CN115292946A - High-pressure turbine efficiency evaluation method and device based on variable specific heat calculation - Google Patents
High-pressure turbine efficiency evaluation method and device based on variable specific heat calculation Download PDFInfo
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Abstract
The application belongs to the technical field of engine tests, and particularly relates to a high-pressure turbine efficiency evaluation method and device based on variable specific heat calculation. The method comprises the steps of S1, calculating a first high-pressure turbine efficiency initial guess value according to a high-pressure turbine efficiency formula; s2, dividing the high-pressure turbine into a plurality of small turbines from an inlet to an outlet, and determining the total inlet temperature and the total outlet temperature of each small turbine; s3, calculating the adiabatic index of each small turbine; s4, determining the total outlet pressure of each small turbine; s5, repeating the steps until the total outlet pressure of the last small turbine is calculated; and S6, determining the change rate of the outlet total pressure of the last small turbine relative to the outlet total pressure of the high-pressure turbine, and if the change rate is greater than a preset value, updating the initial guess value of the efficiency of the first high-pressure turbine until the change rate is smaller than the preset value. The method and the device realize the calculation of the ratio of heat to heat of the high-pressure turbine efficiency, and greatly improve the calculation precision of the high-pressure turbine efficiency.
Description
Technical Field
The application belongs to the technical field of engine tests, and particularly relates to a high-pressure turbine efficiency evaluation method and device based on heat-variable ratio calculation.
Background
In order to evaluate the efficiency of components such as a fan, a compressor, a turbine and the like of an aircraft engine, the total temperature and the total pressure of an inlet and an outlet of the corresponding component are obtained in a measuring or calculating mode, then a constant engine heat insulation index kg (1.33 for gas and 1.4 for air) is given, and the efficiency of the corresponding component is calculated according to the engine principle.
By adopting the method, the efficiency of corresponding parts of the engine can be preliminarily evaluated and calculated, the variation range of the inlet and outlet temperatures of a fan, a gas compressor and the like is small, the calculation accuracy is acceptable, but the variation of the inlet and outlet temperatures of high-pressure turbine parts is large (reduced from thousands of hundreds of K to hundreds of K), the difference between the adiabatic index at the inlet of the high-pressure turbine and the adiabatic index at the outlet is large because the engine adiabatic index kg is related to the gas temperature and the oil-gas ratio, the original technical scheme can only adopt the adiabatic index kg at the inlet or the adiabatic index kg at the outlet, the calculation accuracy is relatively low, the average value of the two is adopted for calculation when the accuracy is slightly high, but the calculation accuracy also has large errors.
Disclosure of Invention
In order to solve one of the problems, the application provides a method and a device for evaluating the efficiency of a high-pressure turbine based on the calculation of the heat-variation ratio, so that the efficiency of the high-pressure turbine can be evaluated more accurately.
The application provides a high-pressure turbine efficiency evaluation method based on heat-to-variable ratio calculation in a first aspect, which mainly comprises the following steps:
step S1, calculating a first high-pressure turbine efficiency initial guess value eta according to a high-pressure turbine efficiency formula TH Calculating an oil-gas ratio according to the air flow at the inlet of the high-pressure turbine and the fuel flow;
s2, enabling the high-pressure turbine to flow from an inlet to an outletDividing the inlet into a plurality of small turbines, and determining the total inlet temperature T of each small turbine according to the total inlet temperature and the total outlet temperature of the high-pressure turbine and the equal-interval cooling principle in (i) And total outlet temperature T out (i)；
S3, according to the total inlet temperature T of the ith small turbine in (i) And the oil-gas ratio determines the adiabatic index k of the ith small turbine g (i)；
Step S4, determining the turbine efficiency eta of the ith small turbine TH(i) And based on the total inlet temperature T of the ith small turbine in (i) Total outlet temperature T out (i) And total pressure at the inlet P in (i) Determining the total outlet pressure P of the ith small turbine out (i) Wherein the total inlet pressure of the first small turbine is the total inlet pressure P of the high-pressure turbine 4 The total outlet pressure of the ith small turbine is the total inlet pressure of the (i + 1) th small turbine;
step S5, repeating the steps S2 to S4 until the total outlet pressure P of the last small turbine is calculated out (num) and assigned to the first variable P 5out ；
S6, determining the total outlet pressure P of the last small turbine out (num) in relation to the total pressure P at the outlet of the high-pressure turbine 5 If the change rate is smaller than the preset value, the first high-pressure turbine efficiency initial guess value given in the step S1 is used as the final value of the high-pressure turbine efficiency, otherwise, the first high-pressure turbine efficiency initial guess value in the step S1 is updated, and the steps are repeated until the change rate is smaller than the preset value.
Preferably, in step S2, the inlet total temperature T of the ith small turbine is in (i) The total outlet temperature of the ith-1 th small turbine and the total outlet temperature T of the ith small turbine out (i) Comprises the following steps:
T out (i)＝T 4 -ΔT*i；
wherein, T 4 Δ T = (T) for total high pressure turbine inlet temperature 5 -T 4 ) ,/num, wherein, T 5 And num is the total outlet temperature of the high-pressure turbine, and the number of the small turbines divided by the high-pressure turbine is num.
Preferably, in step S4, the total outlet pressure P of the ith small turbine is determined out (i) Comprises the following steps:
preferably, in step S6, updating the first high-pressure turbine efficiency initial guess value includes:
step S61, setting a first guess value eta of the second high-pressure turbine efficiency THtmp Setting multiple of the first high-pressure turbine efficiency initial guess value;
step S62, according to the first guess value eta of the second high-pressure turbine efficiency TH Performing an inner loop of steps S2-S5, determining the total outlet pressure of the last small turbine, and assigning a second variable P 5outtmp ；
Step S63, updating the first high-pressure turbine efficiency initial guess value, and executing an outer loop of the steps S2 to S6:
wherein eta is TH(new) The value is guessed for the new first high pressure turbine efficiency.
Preferably, in step S61, the set multiple is 1.01 times.
The second aspect of the present application provides a high-pressure turbine efficiency evaluation device based on heat-to-variable ratio calculation, mainly including:
the efficiency and oil-gas ratio calculation module is used for calculating a first high-pressure turbine efficiency initial guess value eta according to a high-pressure turbine efficiency formula TH Calculating an oil-gas ratio according to the air flow at the inlet of the high-pressure turbine and the fuel flow;
the high-pressure turbine dividing module is used for dividing the high-pressure turbine into a plurality of small turbines from an inlet to an outlet, and determining the total inlet temperature T of each small turbine according to the total inlet temperature and the total outlet temperature of the high-pressure turbine and the equal-interval cooling principle in (i) And total outlet temperature T out (i)；
A small turbine adiabatic index calculation module for calculating the total inlet temperature T of the ith small turbine in (i) And said gas-oil ratio determining the adiabatic index k for the ith small turbine g (i)；
Each small turbine outlet total pressure calculation module is used for determining the turbine efficiency eta of the ith small turbine TH(i) And based on the total inlet temperature T of the ith small turbine in (i) Total outlet temperature T out (i) And inlet total pressure P in (i) Determining the total outlet pressure P of the ith small turbine out (i) Wherein the total inlet pressure of the first small turbine is the total inlet pressure P of the high-pressure turbine 4 The total outlet pressure of the ith small turbine is the total inlet pressure of the (i + 1) th small turbine;
the last small turbine outlet total pressure calculation module is used for repeatedly calling the modules until the outlet total pressure P of the last small turbine is calculated out (num) and assigned to the first variable P 5out ；
A residual-based loop control module for determining the total outlet pressure P of the last small turbine out (num) in relation to the total pressure P at the outlet of the high-pressure turbine 5 If the change rate is smaller than the preset value, the given first high-pressure turbine efficiency initial guess value is used as the final value of the high-pressure turbine efficiency, otherwise, the first high-pressure turbine efficiency initial guess value is updated until the change rate is smaller than the preset value.
Preferably, in the high-pressure turbine division module, the inlet total temperature T of the ith small turbine in (i) The total outlet temperature of the ith-1 th small turbine and the total outlet temperature T of the ith small turbine out (i) Comprises the following steps:
T out (i)＝T 4 -ΔT*i；
wherein, T 4 Δ T = (T) for total high pressure turbine inlet temperature 5 -T 4 ) ,/num, wherein, T 5 And num is the total outlet temperature of the high-pressure turbine, and the number of the small turbines divided by the high-pressure turbine is num.
Preferably, in the total outlet pressure calculation module of each small turbine, the total outlet pressure P of the ith small turbine is determined out (i) Comprises the following steps:
preferably, the residual-based loop control module includes:
a second high-pressure turbine efficiency initial guess value setting unit for setting a second high-pressure turbine efficiency initial guess value eta THtmp Setting multiple of the first high-pressure turbine efficiency initial guess value;
an internal circulation unit for initially guessing the value eta according to the efficiency of the second high-pressure turbine TH Determining the total outlet pressure of the last small turbine and assigning a second variable P 5outtmp ；
An external circulation unit for updating the first high pressure turbine efficiency initial guess value:
wherein eta is TH(new) And guessing the new first high-pressure turbine efficiency.
Preferably, the set multiple is 1.01 times.
This application decomposes high-pressure turbine into a plurality of "little turbine" according to certain temperature drop interval and calculates, realizes the variable specific heat ratio of high-pressure turbine efficiency and calculates, the computational accuracy of improvement high-pressure turbine efficiency that can be very big.
Drawings
FIG. 1 is a flow chart of a preferred embodiment of the method for estimating the efficiency of a high pressure turbine based on the heat-transfer ratio calculation according to the present application.
Detailed Description
In order to make the implementation objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the drawings in the embodiments of the present application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application. Embodiments of the present application will be described in detail below with reference to the drawings.
Generally, in order to obtain high-pressure turbine efficiency with higher precision, a heat-variable specific heat calculation formula (1) is adopted to calculate an adiabatic index kg according to an oil-gas ratio and a total temperature of gas, and then the efficiency of the high-pressure turbine can be calculated according to a formula (2) according to total temperature and total pressure of an inlet and an outlet of the high-pressure turbine obtained by measurement or calculation.
kg = f (oil-gas ratio, total temperature of 823060, 82308230, 823082308230823082308230823082308260 82308230; \8230; \ 8230; \ 8230;' 8230; (1)
Wherein:
t4 and P4 are total temperature and total pressure of an inlet of the high-pressure turbine;
t5 and P5 are total temperature and total pressure of an outlet of the high-pressure turbine;
kg is the adiabatic index.
In order to calculate the efficiency of the high-pressure turbine more accurately, the calculation process of the high-pressure turbine can be divided into an infinite number of small turbines for calculation. And each small turbine is divided according to a fixed temperature drop, the total outlet temperature and the total pressure of each small turbine are sequentially calculated according to the high-pressure turbine efficiency initial value calculated by the formula (2), finally, a residual error is constructed according to the high-pressure turbine outlet pressure, and the high-pressure turbine efficiency initial value is updated and iterated until the residual error meets the error requirement. Specifically, as shown in fig. 1, a first aspect of the present application provides a method for estimating efficiency of a high-pressure turbine based on heat-variation ratio calculation, which mainly includes:
step S1, calculating a first high-pressure turbine efficiency initial guess value eta according to a high-pressure turbine efficiency formula TH And calculating the oil-gas ratio according to the air flow at the inlet of the high-pressure turbine and the fuel flow.
Step S2, applying the high pressureThe turbine is divided into a plurality of small turbines from an inlet to an outlet, and the total inlet temperature T of each small turbine is determined according to the total inlet temperature and the total outlet temperature of the high-pressure turbine and the equal interval cooling principle in (i) And total outlet temperature T out (i)。
In some alternative embodiments, in step S2, the total inlet temperature T of the ith small turbine in (i) The total outlet temperature of the ith-1 small turbine and the total outlet temperature T of the ith small turbine out (i) Comprises the following steps:
T out (i)＝T 4 -ΔT*i；
wherein, T 4 Δ T = (T) for total high pressure turbine inlet temperature 5 -T 4 ) ,/num, wherein, T 5 And num is the total outlet temperature of the high-pressure turbine, and num is the number of small turbines divided by the high-pressure turbine.
S3, according to the total inlet temperature T of the ith small turbine in (i) And the oil-gas ratio determines the adiabatic index k of the ith small turbine g (i)。
Step S4, determining the turbine efficiency eta of the ith small turbine TH(i) And based on the total inlet temperature T of the ith small turbine in (i) Total outlet temperature T out (i) And inlet total pressure P in (i) Determining the total outlet pressure P of the ith small turbine out (i) Wherein the inlet total pressure of the first small turbine is the inlet total pressure P of the high-pressure turbine 4 And the total outlet pressure of the ith small turbine is the total inlet pressure of the (i + 1) th small turbine.
In some alternative embodiments, in step S4, the total outlet pressure P of the ith small turbine is determined out (i) Comprises the following steps:
step S5, repeating the steps S2-S4 until the total outlet pressure P of the last small turbine is calculated out (num) and assigned to the first variable P 5out (ii) a I.e. P 5out ＝P out (num)。
S6, determining the total outlet pressure P of the last small turbine out Relative height of (num)Total pressure P at outlet of pressure turbine 5 If the change rate is smaller than the preset value, the first high-pressure turbine efficiency initial guess value given in the step S1 is used as the final value of the high-pressure turbine efficiency, otherwise, the first high-pressure turbine efficiency initial guess value in the step S1 is updated, and the steps are repeated until the change rate is smaller than the preset value.
In some alternative embodiments, updating the first high-pressure turbine efficiency preliminary guess value in step S6 includes:
step S61, setting the initial guess value eta of the efficiency of the second high-pressure turbine THtmp Setting multiple of the first high-pressure turbine efficiency initial guess value;
step S62, according to the first guess value eta of the second high-pressure turbine efficiency TH Performing an inner loop of steps S2-S5, determining the total outlet pressure of the last small turbine, and assigning a second variable P 5outtmp ；
Step S63, updating the first high-pressure turbine efficiency initial guess value, and executing an outer loop of the steps S2 to S6:
wherein eta is TH(new) The value is guessed for the new first high pressure turbine efficiency.
In some alternative embodiments, in step S61, the set multiple is 1.01 times.
In this example, P is compared 5out And P 5 Error of (2), e.g.
The calculation is terminated; such as
Then set η THtmp ＝η TH *1.01, the total outlet pressure P of the last small turbine is resumed out (num) is calculated and assigned to P 5outtmp (ii) a Then press against
Updating eta TH . Finally, the process is repeated until the new eta is obtained TH The calculated turbine outlet pressure residual meets the error requirement of step S6.
The second aspect of the present application provides a high-pressure turbine efficiency evaluation device based on the heat-variation ratio calculation corresponding to the above method, which mainly includes:
an efficiency and gas-oil ratio calculation module for calculating the first high-pressure turbine efficiency initial guess value eta according to the high-pressure turbine efficiency formula TH Calculating the oil-gas ratio according to the air flow at the inlet of the high-pressure turbine and the fuel flow;
the high-pressure turbine dividing module is used for dividing the high-pressure turbine into a plurality of small turbines from an inlet to an outlet, and determining the total inlet temperature T of each small turbine according to the total inlet temperature and the total outlet temperature of the high-pressure turbine and the equal-interval cooling principle in (i) And total outlet temperature T out (i)；
A small turbine adiabatic index calculation module for calculating the total inlet temperature T of the ith small turbine in (i) And the oil-gas ratio determines the adiabatic index k of the ith small turbine g (i)；
Each small turbine outlet total pressure calculation module is used for determining the turbine efficiency eta of the ith small turbine TH(i) And based on the total inlet temperature T of the ith small turbine in (i) Total outlet temperature T out (i) And inlet total pressure P in (i) Determining the total outlet pressure P of the ith small turbine out (i) Wherein the total inlet pressure of the first small turbine is the total inlet pressure P of the high-pressure turbine 4 The total outlet pressure of the ith small turbine is the total inlet pressure of the (i + 1) th small turbine;
the last small turbine outlet total pressure calculation module is used for repeatedly calling the modules until the outlet total pressure P of the last small turbine is calculated out (num) and assigned to the first variable P 5out ；
A residual-based loop control module for determining the total outlet pressure P of the last small turbine out (num) in relation to the total pressure P at the outlet of the high-pressure turbine 5 If the change rate is less than the predetermined valueAnd if not, updating the first high-pressure turbine efficiency initial guess value until the change rate is smaller than a preset value.
In some alternative embodiments, in the high pressure turbine division module, the inlet total temperature T of the ith small turbine in (i) The total outlet temperature of the ith-1 th small turbine and the total outlet temperature T of the ith small turbine out (i) Comprises the following steps:
T out (i)＝T 4 -ΔT*i；
wherein, T 4 Δ T = (T) for total high pressure turbine inlet temperature 5 -T 4 ) ,/num, wherein, T 5 And num is the total outlet temperature of the high-pressure turbine, and num is the number of small turbines divided by the high-pressure turbine.
In some alternative embodiments, in the total outlet pressure calculation module of each small turbine, the total outlet pressure P of the ith small turbine is determined out (i) Comprises the following steps:
in some optional embodiments, the residual based loop control module comprises:
a second high-pressure turbine efficiency initial guess value setting unit for setting a second high-pressure turbine efficiency initial guess value eta THtmp Setting multiple of the first high-pressure turbine efficiency initial guess value;
an internal circulation unit for initially guessing the value eta according to the efficiency of the second high-pressure turbine TH Determining the total outlet pressure of the last small turbine and assigning a second variable P 5outtmp ；
An outer loop unit for updating the first high pressure turbine efficiency initial guess value:
wherein eta is TH(new) Initial guess value for first high pressure turbine efficiency。
In some alternative embodiments, the set multiple is 1.01 times.
This application decomposes high-pressure turbine into a plurality of "little turbine" according to certain temperature drop interval and calculates, realizes the variable specific heat ratio of high-pressure turbine efficiency and calculates, the computational accuracy of improvement high-pressure turbine efficiency that can be very big.
Although the present application has been described in detail with respect to the general description and specific embodiments, it will be apparent to those skilled in the art that certain modifications or improvements may be made based on the present application. Accordingly, such modifications and improvements are intended to be within the scope of this invention as claimed.
Claims (10)
1. A high-pressure turbine efficiency evaluation method based on heat of variation calculation is characterized by comprising the following steps:
step S1, calculating a first high-pressure turbine efficiency initial guess value eta according to a high-pressure turbine efficiency formula TH Calculating an oil-gas ratio according to the air flow at the inlet of the high-pressure turbine and the fuel flow;
s2, dividing the high-pressure turbine into a plurality of small turbines from an inlet to an outlet, and determining the total inlet temperature T of each small turbine according to the equal interval cooling principle according to the total inlet temperature and the total outlet temperature of the high-pressure turbine in (i) And total outlet temperature T out (i)；
S3, according to the total inlet temperature T of the ith small turbine in (i) And said gas-oil ratio determining the adiabatic index k for the ith small turbine g (i)；
Step S4, determining the turbine efficiency eta of the ith small turbine TH(i) And based on the total inlet temperature T of the ith small turbine in (i) Total outlet temperature T out (i) And total pressure at the inlet P in (i) Determining the total outlet pressure P of the ith small turbine out (i) Wherein the inlet total pressure of the first small turbine is the inlet total pressure P of the high-pressure turbine 4 The total outlet pressure of the ith small turbine is the total inlet pressure of the (i + 1) th small turbine;
step S5, repeating the stepS2-S4, until the total outlet pressure P of the last small turbine is calculated out (num) and assigned to the first variable P 5out ；
S6, determining the total outlet pressure P of the last small turbine out (num) relative to the total pressure at the outlet of the high-pressure turbine P 5 If the change rate is smaller than the preset value, the first high-pressure turbine efficiency initial guess value given in the step S1 is used as the final value of the high-pressure turbine efficiency, otherwise, the first high-pressure turbine efficiency initial guess value in the step S1 is updated, and the steps are repeated until the change rate is smaller than the preset value.
2. The method for evaluating the efficiency of a high-pressure turbine based on the calculation of the specific heat capacity according to claim 1, wherein in step S2, the total inlet temperature T of the ith small turbine is in (i) The total outlet temperature of the ith-1 small turbine and the total outlet temperature T of the ith small turbine out (i) Comprises the following steps:
T out (i)＝T 4 -ΔT*i；
wherein, T 4 Δ T = (T) for total high pressure turbine inlet temperature 5 -T 4 ) ,/num, wherein, T 5 And num is the total outlet temperature of the high-pressure turbine, and num is the number of small turbines divided by the high-pressure turbine.
3. The method for estimating the efficiency of a high-pressure turbine based on a variable specific heat calculation as claimed in claim 1, wherein in step S4, the total outlet pressure P of the ith small turbine is determined out (i) Comprises the following steps:
4. a method for estimating the efficiency of a high pressure turbine based on the calculation of the specific heat variation according to claim 1, wherein the updating the first initial guess value of the efficiency of the high pressure turbine in step S6 includes:
step S61, setting a first guess value eta of the second high-pressure turbine efficiency THtmp Is the first high pressure vortexSetting multiple of the initial guess value of the wheel efficiency;
step S62, according to the first guess value eta of the second high-pressure turbine efficiency TH Performing an inner loop of steps S2-S5, determining the total outlet pressure of the last small turbine, and assigning a second variable P 5outtmp ；
Step S63, updating the first high-pressure turbine efficiency initial guess value, and executing an outer loop of the steps S2 to S6:
wherein eta is TH(new) The value is guessed for the new first high pressure turbine efficiency.
5. The method for evaluating a high-pressure turbine efficiency based on a calculation of a specific heat capacity according to claim 1, wherein in step S61, the set multiple is 1.01 times.
6. A high-pressure turbine efficiency evaluation device based on a variable specific heat calculation, characterized by comprising:
the efficiency and oil-gas ratio calculation module is used for calculating a first high-pressure turbine efficiency initial guess value eta according to a high-pressure turbine efficiency formula TH Calculating an oil-gas ratio according to the air flow at the inlet of the high-pressure turbine and the fuel flow;
the high-pressure turbine dividing module is used for dividing the high-pressure turbine into a plurality of small turbines from an inlet to an outlet, and determining the total inlet temperature T of each small turbine according to the total inlet temperature and the total outlet temperature of the high-pressure turbine and the equal-interval cooling principle in (i) And total outlet temperature T out (i)；
A small turbine adiabatic index calculation module for calculating the total inlet temperature T of the ith small turbine in (i) And said gas-oil ratio determining the adiabatic index k for the ith small turbine g (i)；
Each small turbine outlet total pressure calculation module is used for determining the turbine efficiency eta of the ith small turbine TH(i) And based on the total inlet temperature T of the ith small turbine in (i) Total outlet temperature T out (i) And total pressure at the inlet P in (i) Determining the total outlet pressure P of the ith small turbine out (i) Wherein the total inlet pressure of the first small turbine is the total inlet pressure P of the high-pressure turbine 4 The total outlet pressure of the ith small turbine is the total inlet pressure of the (i + 1) th small turbine;
the last small turbine outlet total pressure calculation module is used for repeatedly calling the modules until the outlet total pressure P of the last small turbine is calculated out (num) and assigned to the first variable P 5out ；
A residual-based loop control module for determining the total outlet pressure P of the last small turbine out (num) relative to the total pressure at the outlet of the high-pressure turbine P 5 If the change rate is smaller than the preset value, the given first high-pressure turbine efficiency initial guess value is used as the final value of the high-pressure turbine efficiency, otherwise, the first high-pressure turbine efficiency initial guess value is updated until the change rate is smaller than the preset value.
7. A high-pressure turbine efficiency evaluation device based on specific heat variation calculation as claimed in claim 6, wherein in the high-pressure turbine division module, the inlet total temperature T of the ith small turbine in (i) The total outlet temperature of the ith-1 th small turbine and the total outlet temperature T of the ith small turbine out (i) Comprises the following steps:
T out (i)＝T 4 -ΔT*i；
wherein, T 4 Δ T = (T) for total high pressure turbine inlet temperature 5 -T 4 ) ,/num, wherein, T 5 And num is the total outlet temperature of the high-pressure turbine, and num is the number of small turbines divided by the high-pressure turbine.
8. The variable specific heat calculation-based high-pressure turbine efficiency evaluation device according to claim 6, wherein in each small turbine outlet total pressure calculation module, the outlet total pressure P of the ith small turbine is determined out (i) Comprises the following steps:
9. a high-pressure turbine efficiency estimation apparatus based on heat-of-variation calculation as described in claim 6 wherein said residual based loop control module comprises:
a second high-pressure turbine efficiency initial guess value setting unit for setting a second high-pressure turbine efficiency initial guess value eta THtmp Setting multiple of the first high-pressure turbine efficiency initial guess value;
an internal circulation unit for initially guessing the value eta according to the efficiency of the second high-pressure turbine TH Determining the total outlet pressure of the last small turbine and assigning a second variable P 5outtmp ；
An outer loop unit for updating the first high pressure turbine efficiency initial guess value:
wherein eta is TH(new) The value is guessed for the new first high pressure turbine efficiency.
10. A high-pressure turbine efficiency evaluation device based on a specific heat change calculation as set forth in claim 9, wherein said set multiple is 1.01 times.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060196182A1 (en) * | 2005-03-02 | 2006-09-07 | Denso Corporation | Controller for internal combustion engine with supercharger |
| CN102356222A (en) * | 2009-01-22 | 2012-02-15 | 雷诺股份公司 | Method and device for determining the pressure upstream from the turbine of supercharging turbocharger of thermal engine |
| US20150275753A1 (en) * | 2012-09-13 | 2015-10-01 | Avl List Gmbh | Method for Monitoring at Least One Exhaust Gas Turbocharger |
| CN108931379A (en) * | 2018-05-24 | 2018-12-04 | 北京理工大学 | A kind of turbine efficiency measurement method |
| JP2019094854A (en) * | 2017-11-24 | 2019-06-20 | トヨタ自動車株式会社 | Control device of internal combustion engine |
| CN109948231A (en) * | 2019-03-14 | 2019-06-28 | 中国航发湖南动力机械研究所 | Engine cycle parameters analysis method and device |
| US20200033229A1 (en) * | 2017-02-16 | 2020-01-30 | Hino Motors, Ltd. | State quantity estimating device |
| CN112100862A (en) * | 2020-09-24 | 2020-12-18 | 南京航空航天大学 | Novel turbine isentropic efficiency fast solving method based on variable specific heat capacity |
| CN112507586A (en) * | 2020-12-02 | 2021-03-16 | 中国航发沈阳发动机研究所 | Rapid assessment method for two-dimensional temperature and strength of turbine air cooling blade |
-
2022
- 2022-08-15 CN CN202210977690.0A patent/CN115292946B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060196182A1 (en) * | 2005-03-02 | 2006-09-07 | Denso Corporation | Controller for internal combustion engine with supercharger |
| CN102356222A (en) * | 2009-01-22 | 2012-02-15 | 雷诺股份公司 | Method and device for determining the pressure upstream from the turbine of supercharging turbocharger of thermal engine |
| US20150275753A1 (en) * | 2012-09-13 | 2015-10-01 | Avl List Gmbh | Method for Monitoring at Least One Exhaust Gas Turbocharger |
| US20200033229A1 (en) * | 2017-02-16 | 2020-01-30 | Hino Motors, Ltd. | State quantity estimating device |
| JP2019094854A (en) * | 2017-11-24 | 2019-06-20 | トヨタ自動車株式会社 | Control device of internal combustion engine |
| CN108931379A (en) * | 2018-05-24 | 2018-12-04 | 北京理工大学 | A kind of turbine efficiency measurement method |
| CN109948231A (en) * | 2019-03-14 | 2019-06-28 | 中国航发湖南动力机械研究所 | Engine cycle parameters analysis method and device |
| CN112100862A (en) * | 2020-09-24 | 2020-12-18 | 南京航空航天大学 | Novel turbine isentropic efficiency fast solving method based on variable specific heat capacity |
| CN112507586A (en) * | 2020-12-02 | 2021-03-16 | 中国航发沈阳发动机研究所 | Rapid assessment method for two-dimensional temperature and strength of turbine air cooling blade |
Non-Patent Citations (1)
| Title |
|---|
| 王华: "影响涡轮增压器涡轮端效率的几个因素", 《内燃机及配件》, no. 5, pages 9 - 10 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116087613A (en) * | 2023-04-07 | 2023-05-09 | 沃德传动（天津）股份有限公司 | Reciprocating compressor energy efficiency calculation system |
| CN116087613B (en) * | 2023-04-07 | 2023-06-30 | 沃德传动（天津）股份有限公司 | Reciprocating compressor energy efficiency calculation system |
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