CN105631126A - Method for generating operating overall characteristic curve of prototype turbine - Google Patents
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Abstract
The invention relates to the three-dimensional model conversion technology and aims at solving the problems that in the prior art, when an overall characteristic curve of a model turbine is converted into an operating overall characteristic curve of a prototype turbine, an auxiliary line needs to be drawn, the workload is large, man-made influence factors are more, and working efficiency and drawing precision are low. According to a method for generating the operating overall characteristic curve of the prototype turbine, according to the overall characteristic curve of the model turbine, coordinates of points on equivalent efficiency lines of the prototype turbine, coordinates of points on equivalent output lines of the prototype turbine, coordinates of points on equivalent draft height lines of the prototype turbine, coordinates of points on equivalent guide vane opening lines of the prototype turbine and the like are calculated through computer software, on the basis, equivalent efficiency lines, equivalent output lines, equivalent draft height lines, equivalent guide vane opening lines, output limiting lines and the like of prototype turbine are drawn on H-P and Q-P plane coordinate graphs respectively, and then operating region division of the prototype turbine is further realized. The method is suitable for converting the overall characteristic curve of the model turbine the operating overall characteristic curve of the prototype turbine.
Description
Technical field
The present invention relates to three-dimensional model transformation technology, it is converted into the method for prototype turbine running overall characteristic curve in particular to a kind of model hydraulic turbine efficiency hill diagram.
Background technology
Prototype turbine, refer to the mechanical energy that in power station, the mechanical energy of current is changed into runner, the machine making runner and main shaft overcome various resistance and to operate continuously, is called as " heart " in power station, and the performance of hydroelectric power plant's economic benefit is had decisive effect by its safe and highly efficient operation. Prototype turbine is transformed by model water turbine by similarity principle, and therefore prototype turbine running overall characteristic curve is also obtain through similar conversion and correction by model hydraulic turbine efficiency hill diagram.
Prototype turbine running overall characteristic curve is the important evidence of power station Optimization Dispatching. Actual exerting oneself in order to carry out the reasonably each unit of dispensing water power plant such as the water yield and water levels of upstream and downstream according to electrical network load, upstream obtains best economic benefit, scheduling department and hydroelectric power plant need prototype turbine running overall characteristic curve, grasping head, the flow of prototype turbine comprehensively, exert oneself, efficiency, aperture, cavitation, the characteristic such as pressure pulsation and mutual relation thereof and optimized operation region. For this reason, it is necessary to by similarity principle and correction, model hydraulic turbine efficiency hill diagram is converted into prototype turbine running overall characteristic curve.
In currently available technology, the immediate implementation solved the problem is with the present invention: in order to model hydraulic turbine efficiency hill diagram is converted into prototype turbine running overall characteristic curve, it is necessary to first draw the efficiency auxiliary line �� under each head H in planimetric coordinates figureT=f (PP), sucking-off height auxiliary line Hs=f (PP), stator aperture line auxiliary line a0=f (PP) and blade corner auxiliary line ��=f (PP), then it is crossing with auxiliary line to make some sea lines, moves each intersection point to H-PPIn coordinate diagram and smooth be successively linked to be curve, be the efficiency line such as corresponding, etc. sucking-off height line, etc. stator aperture line and etc. blade corner stitch.
In prior art, when model hydraulic turbine efficiency hill diagram is converted into prototype turbine running overall characteristic curve, the way owing to generally adopting at present is the efficiency auxiliary line �� under each head H first drawn by needs in planimetric coordinates figureT=f (PP), sucking-off height auxiliary line Hs=f (PP), stator aperture line auxiliary line a0=f (PP) and blade corner auxiliary line ��=f (PP), then it is crossing with auxiliary line to make some sea lines, moves each intersection point to H-PPIn coordinate diagram and smooth be successively linked to be curve, just can obtain the efficiency line such as required, etc. sucking-off height line, etc. stator aperture line and etc. blade corner stitch. The method workload is big, artifical influence factor is many, working efficiency and plotting accuracy low, fail to give full play to the advantage of computer aided design (CAD), the curve of drafting also cannot meet set optimization scheduling requirement, be unfavorable for the performance of power plant safety and economic benefit.
Summary of the invention
It is an object of the invention to solve in prior art, when model hydraulic turbine efficiency hill diagram is converted into prototype turbine running overall characteristic curve, workload is big, artifical influence factor is many, working efficiency and plotting accuracy low, the curve drawn also cannot meet the requirement of set optimization scheduling, is unfavorable for the problem of the performance of power plant safety and economic benefit.
For achieving the above object, the present invention provides a kind of method generating prototype turbine running overall characteristic curve, comprises the steps:
Coordinate calculates: within the scope of hydraulic turbine operating head, chooses the uniform head in some intervals, calculates the prototype turbine unit speed n that each head is corresponding respectively11pAnd corresponding model unit speed of hydraulic turbine n11m; According to described each model unit speed of hydraulic turbine n11mAnd the efficiency line such as each in model hydraulic turbine efficiency hill diagram figure, etc. aperture line, etc. blade corner stitch, etc. nozzle aperture line, equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape be nascent and development line obtains corresponding model unit speed of hydraulic turbine n11m, unit capacity Q11m, efficiency etam, aperture a0m, corner ��, nozzle aperture S0m; Utilize similarity principle and correction formula, the efficiency eta of prototype turbine corresponding under calculating each headp, flow Qp, exert oneself Pp, aperture a0p, corner ��, nozzle aperture S0p, obtain the coordinate �� of point on the efficiency line such as each of prototype turbinepi=f (Ppij,Hij) and ��pi=f (Hij,Qpij), the coordinate a of point on the stator aperture line such as each0i=f (Ppij,Hij) and a0i=f (Hij,Qpij), the coordinate �� of point in the blade corner stitch such as eachi=f (Ppij,Hij) and ��i=f (Hij,Qpij), the coordinate S of point on the nozzle aperture line such as eachi=f (Ppij,Hij) and Si=f (Hij,Qpij) and equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape are nascent and the coordinate of development line;
The efficiency lines such as prototype turbine are drawn: within the scope of hydraulic turbine operating head, make described each model unit speed of hydraulic turbine n11mThe efficiency line turning point such as each of parallel lines and model overall characteristic graphic representation is tangent, calculates each point of contact coordinate ��pi=f (Ppi,Hi) and ��pi=f (Hi,Qpi), described point of contact coordinate is the efficiency line turning points such as prototype turbine is each; Point on the efficiency line such as each of the described prototype turbine calculated and described turning point are drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and are linked to be smooth curve, described in the smooth curve that is linked to be prototype turbine etc. efficiency line; Calculate the prototype turbine top efficiency point coordinate �� that model water turbine top efficiency point is correspondingpmax=f (Popt,Hd) and ��pmax=f (Hd,Qopt), and be drawn in respectively on H-P, Q-H planimetric coordinates figure, it is the top efficiency working point of prototype turbine;
Prototype turbines etc. go out the line of force and draw: in the H-P planimetric coordinates figure of prototype turbine running overall characteristic curve, make P=Pmax, P=PrAnd P �� 0.9Pr��P��0.8Pr��������P��0.3Pr��P��0.2PrEtc. exert oneself parallel lines and prototype turbine etc. efficiency line crossing, read the head H of each intersection point; Utilize formula Q=P/ (gH ��) to calculate the flow Q of each intersection point, obtain (P, ��, H, Q) value of each intersection point; The point P in the line of force is gone out by each etc.i=f (Qij,Hij) be drawn on Q-H planimetric coordinates figure according to getting order a little and be linked to be smooth curve, it is prototype turbine etc. and goes out the line of force, PrRepresent specified exerting oneself;
The sucking-off height lines such as prototype turbine are drawn: according to hydraulic turbine operating head H scope and model cavitation factor sigmamSize and distribution situation, draft several suitable sucking-off height H every 1��2msValue; Utilize formulaCalculate different HsCorresponding prototype turbine working head H and unit speed n11pAnd corresponding model unit speed of hydraulic turbine n11m; Utilize model unit speed of hydraulic turbine n11mMake parallel lines crossing with cavitation coefficient line each etc. in model hydraulic turbine efficiency hill diagram figure, read the efficiency eta of intersection pointmWith unit capacity Q11m; Calculate the P and flow Q and each wait the coordinate H put on sucking-off height line of exerting oneself of prototype turbinesi=f (Ppij,Hij) and Hsi=f (Hij,Qij); Wait the point on sucking-off height line to be drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and be linked to be smooth curve by each, it is the sucking-offs such as prototype turbine highly line;
Prototype turbine restraining line of exerting oneself is drawn: the point sending out specified by rated head to exert oneself and be linked to be a straight line in the force that goes out of minimum head, maximum stator aperture, is output of hydraulic turbine restraining line;
By each coordinate a waiting point on stator aperture line of prototype turbine0i=f (Ppij,Hij) and a0i=f (Hij,Qpij), the coordinate �� of point in the blade corner stitch such as eachi=f (Ppij,Hij) and ��i=f (Hij,Qpij), the coordinate S of point on the nozzle aperture line such as eachi=f (Ppij,Hij) and Si=f (Hij,Qpij) and equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape are nascent and the coordinate of development line etc. is drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and is linked to be smooth curve, namely obtain the aperture lines such as prototype turbine is corresponding, etc. blade corner stitch, etc. nozzle aperture line, the nascent cavitation line of equipressure pulsation line and the blade water inlet positive back side, limit or separation of flow line, vortex tape is nascent and develops line.
Further, exert oneself in the drafting of restraining line, for the unit being provided with maximum output, the method for drafting of its restraining line of exerting oneself is as follows: by sending out the point of minimum head of maximum output, the rated head point sending out specified to exert oneself and be linked to be straight line in the force that goes out of minimum head, maximum stator aperture, is output of hydraulic turbine restraining line.
Specifically, for Francis turbine, also comprise operation area to draw, described operation area comprises steady running district, overload district, does not recommend region of operation, allows region of operation, forbids region of operation and vortex rope district, according to prototype turbine, each operation area described waits that sucking-off height line, restraining line of exerting oneself, equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape be nascent and development line generalization is determined.
Preferably, when choosing the uniform head in some intervals, the head number chosen is 8 to 12, comprises minimum head, rated head and maximum head in selected head. The quantity of a kind of preferred head number is 10.
The invention has the beneficial effects as follows:
Adopt the model hydraulic turbine efficiency hill diagram of the present invention to be converted into the method for prototype turbine running overall characteristic curve, eliminate and make efficiency auxiliary line ��T=f (PP), etc. sucking-off height auxiliary line Hs=f (PP), etc. stator aperture line auxiliary line a0=f (PP) and etc. blade corner auxiliary line ��=f (PP) etc. middle-chain, fully saved the time making prototype turbine overall characteristic curve, it is to increase drawing efficiency;
When coordinate calculates, give full play to the powerful calculating of computer EXCEL software, drawing advantage, by model unit speed of hydraulic turbine n corresponding for each head11m, unit capacity Q11m, efficiency etam, aperture a0m, corner ��, nozzle aperture S0mEtc. inserting in EXCEL table, correlation formula can be utilized, EXCEL table calculates the efficiency eta of prototype turbine automaticallyp, flow Qp, exert oneself Pp, aperture a0p, corner ��, nozzle aperture S0pDeng and be depicted as corresponding contour curve;
Specify that the method drawing prototype turbine running overall characteristic curve on Q-H planimetric coordinates figure and etc. go out calculating, the method for drafting of the line of force, actual the exerting oneself utilizing prototype turbine running overall characteristic curve reasonably to distribute each unit for scheduling department and hydroelectric power plant provides technical support;
Specify that the efficiency line turning point such as each of model overall characteristic graphic representation (i.e. vertex or (with) lower-most point) the method choosing and being converted into the efficiency line turning point such as prototype turbine is each, for rationally determine the efficiency lines such as prototype turbine is each vertex or (with) scope and the shape of lower-most point and curve provide foundation;
Specify that model water turbine top efficiency point is converted into the method for prototype turbine top efficiency point, provide foundation for rationally determining the top efficiency working point of prototype turbine.
Embodiment
Below to the present invention according to model hydraulic turbine efficiency hill diagram be converted into prototype turbine running overall characteristic curve method be further elaborated.
The present invention is for solving in prior art, when model hydraulic turbine efficiency hill diagram is converted into prototype turbine running overall characteristic curve, workload is big, artifical influence factor is many, working efficiency and plotting accuracy are low, the curve drawn also cannot meet the requirement of set optimization scheduling, it is unfavorable for the problem of the performance of power plant safety and economic benefit, provide one both to have saved and make auxiliary line obviously to reduce workload and artifical influence factor, the advantage of computer aided design (CAD) can also be given full play to, to increase work efficiency and plotting accuracy, meet the requirement of set optimization scheduling, and it is simple, it is convenient to the technical solution implemented. the idiographic flow of the program is as follows.
1, list calculates: 1) within the scope of hydraulic turbine operating head, gets the uniform head in some intervals, generally gets 8��12, and comprise minimum head, rated head and maximum head. Calculate the prototype turbine unit speed n that each head is corresponding respectively11pAnd corresponding model unit speed of hydraulic turbine n11m, with each n11mValue do parallel lines and efficiency line each etc. in model hydraulic turbine efficiency hill diagram figure, etc. aperture line, etc. blade corner stitch, etc. nozzle aperture line, the nascent cavitation line of equipressure pulsation line and the blade water inlet positive back side, limit or separation of flow line, vortex tape be nascent and development line etc. is crossing, by model unit speed of hydraulic turbine n corresponding for each intersection point11m, unit capacity Q11m, efficiency etam, aperture a0m, corner ��, nozzle aperture S0mEtc. inserting in EXCEL table; 2) similarity principle and correction formula is utilized, the efficiency eta of the prototype turbine that row EXCEL table is corresponding under calculating each headp, flow Qp, exert oneself Pp, aperture a0p, corner ��, nozzle aperture S0pDeng, obtain the coordinate �� of point on the efficiency line such as each of prototype turbinepi=f (Ppij,Hij) and ��pi=f (Hij,Qpij), the coordinate a of point on the stator aperture line such as each0i=f (Ppij,Hij) and a0i=f (Hij,Qpij), the coordinate �� of point in the blade corner stitch such as eachi=f (Ppij,Hij) and ��i=f (Hij,Qpij), the coordinate S of point on the nozzle aperture line such as eachi=f (Ppij,Hij) and Si=f (Hij,Qpij) and equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape are nascent and the coordinate of development line etc.
2, etc. efficiency line is drawn:
1) within the scope of hydraulic turbine operating head, described each model unit speed of hydraulic turbine n is made11mThe efficiency line turning point such as each of parallel lines and model overall characteristic graphic representation is tangent, is vertex and/or the lower-most point of model hydraulic turbine efficiency hill diagram etc. efficiency line turning point, calculates each point of contact coordinate ��pi=f (Ppi,Hi) and ��pi=f (Hi,Qpi), described point of contact coordinate is the efficiency line turning points such as prototype turbine is each;
2) point on the efficiency line such as each of the prototype turbine calculated and described turning point are drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and are linked to be smooth curve, described in the smooth curve that is linked to be prototype turbine etc. efficiency line;
3) the prototype turbine top efficiency point coordinate �� that model water turbine top efficiency point is corresponding is calculatedpmax=f (Popt,Hd) and ��pmax=f (Hd,Qopt), and be drawn in respectively on H-P, Q-H planimetric coordinates figure, it is the top efficiency working point of prototype turbine.
3, etc. go out the line of force to draw:
In the H-P planimetric coordinates figure of prototype turbine running overall characteristic curve, make P=Pmax, P=PrAnd P �� 0.9Pr��P��0.8Pr��������P��0.3Pr��P��0.2PrEtc. exert oneself parallel lines and prototype turbine etc. efficiency line crossing, read the head H of each intersection point; Utilize formula Q=P/ (gH ��) to calculate the flow Q of each intersection point, obtain (P, ��, H, Q) value of each intersection point; The point P in the line of force is gone out by each etc.i=f (Qij,Hij) be drawn on Q-H planimetric coordinates figure according to getting order a little and be linked to be smooth curve, it is prototype turbine etc. and goes out the line of force.
4, etc. sucking-off is highly drawn:
1) according to hydraulic turbine operating head H scope and model cavitation factor sigmamSize and distribution situation, draft several suitable sucking-off height H every 1��2msValue;
2) formula is utilizedCalculate different HsCorresponding prototype turbine working head H and unit speed n11pAnd corresponding model unit speed of hydraulic turbine n11m;
3) model unit speed of hydraulic turbine n is utilized11mMake parallel lines crossing with cavitation coefficient line each etc. in model hydraulic turbine efficiency hill diagram figure, read the efficiency eta of intersection pointmWith unit capacity Q11m;
4) P and flow Q and each wait the coordinate H put on sucking-off height line of exerting oneself of prototype turbine is calculatedsi=f (Ppij,Hij) and Hsi=f (Hij,Qij);
5) wait the point on sucking-off height line to be drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and be linked to be smooth curve by each, it is the sucking-offs such as prototype turbine highly line.
5, exert oneself restraining line draw:
Restraining line of exerting oneself is made up of generator output restraining line and output of hydraulic turbine restraining line two portions. Limit by the specified wattful power of generator at the above unit output of rated head, it is a straight line; Limit by the maximum stator aperture of water turbine or cavitation corrosion below rated head. Easy method for drafting is the point sending out specified by rated head to exert oneself and is linked to be a straight line in the force that goes out of minimum head, maximum stator aperture, is output of hydraulic turbine restraining line. For the unit being provided with maximum output, limit by the maximum wattful power of generator at the minimum head and above unit output sending out maximum output, it is a straight line; Limit by the maximum stator aperture of water turbine or cavitation corrosion below the minimum head sending out maximum output. Easy method for drafting is the point of the minimum head by sending out maximum output, the rated head point sending out specified to exert oneself and is linked to be straight line in the force that goes out of minimum head, maximum stator aperture, is output of hydraulic turbine restraining line. When output of hydraulic turbine limits by cavitation corrosion condition, sucking-off height limitation line should be drawn simultaneously.
6, etc. aperture line, etc. blade corner stitch, etc. nozzle aperture line, the nascent cavitation line of equipressure pulsation line and the blade water inlet positive back side, limit or separation of flow line, vortex tape be nascent and development line is drawn: each isopleth point coordinate calculated is drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and is linked to be smooth curve, namely obtains the corresponding isopleth of prototype turbine.
For Francis turbine, generally also be painted with steady running district, overload district, do not recommend region of operation, allow region of operation, forbid region of operation, vortex rope district etc., these region of operation can according to prototype turbine wait that sucking-off height line, restraining line of exerting oneself, equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape be nascent and development line etc. is comprehensively determined, to instruct and to optimize operation and the scheduling of water turbine.
Claims (4)
1. one kind generates the method for prototype turbine running overall characteristic curve, it is characterised in that, comprise the steps:
Coordinate calculates: within the scope of hydraulic turbine operating head, chooses the uniform head in some intervals, calculates the prototype turbine unit speed n that each head is corresponding respectively11pAnd corresponding model unit speed of hydraulic turbine n11m; According to described each model unit speed of hydraulic turbine n11mAnd the efficiency line such as each in model hydraulic turbine efficiency hill diagram figure, etc. aperture line, etc. blade corner stitch, etc. nozzle aperture line, equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape be nascent and development line obtains corresponding model unit speed of hydraulic turbine n11m, unit capacity Q11m, efficiency etam, aperture a0m, corner ��, nozzle aperture S0m; Utilize similarity principle and correction formula, the efficiency eta of prototype turbine corresponding under calculating each headp, flow Qp, exert oneself Pp, aperture a0p, corner ��, nozzle aperture S0p, obtain the coordinate �� of point on the efficiency line such as each of prototype turbinepi=f (Ppij,Hij) and ��pi=f (Hij,Qpij), the coordinate a of point on the stator aperture line such as each0i=f (Ppij,Hij) and a0i=f (Hij,Qpij), the coordinate �� of point in the blade corner stitch such as eachi=f (Ppij,Hij) and ��i=f (Hij,Qpij), the coordinate S of point on the nozzle aperture line such as eachi=f (Ppij,Hij) and Si=f (Hij,Qpij) and equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape are nascent and the coordinate of development line;
The efficiency lines such as prototype turbine are drawn: within the scope of hydraulic turbine operating head, make described each model unit speed of hydraulic turbine n11mThe efficiency line turning point such as each of parallel lines and model overall characteristic graphic representation is tangent, calculates each point of contact coordinate ��pi=f (Ppi,Hi) and ��pi=f (Hi,Qpi), described point of contact coordinate is the efficiency line turning points such as prototype turbine is each; Point on the efficiency line such as each of the described prototype turbine calculated and described turning point are drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and are linked to be smooth curve, described in the smooth curve that is linked to be prototype turbine etc. efficiency line; Calculate the prototype turbine top efficiency point coordinate �� that model water turbine top efficiency point is correspondingpmax=f (Popt,Hd) and ��pmax=f (Hd,Qopt), and be drawn in respectively on H-P, Q-H planimetric coordinates figure, it is the top efficiency working point of prototype turbine;
Prototype turbines etc. go out the line of force and draw: in the H-P planimetric coordinates figure of prototype turbine running overall characteristic curve, make P=Pmax, P=PrAnd P �� 0.9Pr��P��0.8Pr��������P��0.3Pr��P��0.2PrEtc. exert oneself parallel lines and prototype turbine etc. efficiency line crossing, read the head H of each intersection point; Utilize formula Q=P/ (gH ��) to calculate the flow Q of each intersection point, obtain (P, ��, H, Q) value of each intersection point; The point P in the line of force is gone out by each etc.i=f (Qij,Hij) be drawn on Q-H planimetric coordinates figure according to getting order a little and be linked to be smooth curve, it is prototype turbine etc. and goes out the line of force, wherein PmaxRepresent maximum output, PrRepresent specified exerting oneself;
The sucking-offs such as prototype turbine are highly drawn: according to hydraulic turbine operating head H scope and model cavitation factor sigmamSize and distribution situation, draft several suitable sucking-off height H every 1��2msValue; Utilize formulaCalculate different HsCorresponding prototype turbine working head H and unit speed n11pAnd corresponding model unit speed of hydraulic turbine n11m; Utilize model unit speed of hydraulic turbine n11mMake parallel lines crossing with cavitation coefficient line each etc. in model hydraulic turbine efficiency hill diagram figure, read the efficiency eta of intersection pointmWith unit capacity Q11m; Calculate the P and flow Q and each wait the coordinate H put on sucking-off height line of exerting oneself of prototype turbinesi=f (Ppij,Hij) and Hsi=f (Hij,Qij); Wait the point on sucking-off height line to be drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and be linked to be smooth curve by each, it is the sucking-offs such as prototype turbine highly line;
Prototype turbine restraining line of exerting oneself is drawn: the point sending out specified by rated head to exert oneself and be linked to be a straight line in the force that goes out of minimum head, maximum stator aperture, is output of hydraulic turbine restraining line;
By each coordinate a waiting point on stator aperture line of prototype turbine0i=f (Ppij,Hij) and a0i=f (Hij,Qpij), the coordinate �� of point in the blade corner stitch such as eachi=f (Ppij,Hij) and ��i=f (Hij,Qpij), the coordinate S of point on the nozzle aperture line such as eachi=f (Ppij,Hij) and Si=f (Hij,Qpij) and equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape are nascent and the coordinate of development line etc. is drawn on H-P, Q-H planimetric coordinates figure respectively according to getting order a little and is linked to be smooth curve, namely obtain the aperture lines such as prototype turbine is corresponding, etc. blade corner stitch, etc. nozzle aperture line, the nascent cavitation line of equipressure pulsation line and the blade water inlet positive back side, limit or separation of flow line, vortex tape is nascent and develops line.
2. the method generating prototype turbine running overall characteristic curve as claimed in claim 1, it is characterized in that, exert oneself in the drafting of restraining line, for the unit being provided with maximum output, the method for drafting of its restraining line of exerting oneself is as follows: by sending out the point of minimum head of maximum output, the rated head point sending out specified to exert oneself and be linked to be straight line in the force that goes out of minimum head, maximum stator aperture, is output of hydraulic turbine restraining line.
3. the method generating prototype turbine running overall characteristic curve as claimed in claim 1, it is characterized in that, for Francis turbine, also comprise operation area to draw, described operation area comprises steady running district, overload district, does not recommend region of operation, allows region of operation, forbids region of operation and vortex rope district, according to prototype turbine, each operation area described waits that sucking-off height line, restraining line of exerting oneself, equipressure pulsation line, the nascent cavitation line in the blade water inlet positive back side, limit or separation of flow line, vortex tape be nascent and development line generalization is determined.
4. a kind of method generating prototype turbine running overall characteristic curve as claimed in claim 1, it is characterized in that, when choosing the uniform head in some intervals, the head number chosen is 8 to 12, comprises minimum head, rated head and maximum head in selected head.
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| CN105824989A (en) * | 2016-03-09 | 2016-08-03 | 西华大学 | Method for generating integrated operation characteristic curve of movable-blade propeller type prototype water turbine |
| CN105824989B (en) * | 2016-03-09 | 2018-10-19 | 西华大学 | A method of it generating rotary propeller type prototype water turbine and operates combined characteristic |
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| CN107153753B (en) * | 2017-06-26 | 2020-10-09 | 中国电建集团成都勘测设计研究院有限公司 | Method for estimating basic parameters of mixed-flow water turbine |
| CN107153753A (en) * | 2017-06-26 | 2017-09-12 | 中国电建集团成都勘测设计研究院有限公司 | A kind of method of Francis turbine basic parameter estimation |
| CN108959699A (en) * | 2018-05-21 | 2018-12-07 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for reading efficiency value of operating characteristic curve of water turbine |
| CN108959699B (en) * | 2018-05-21 | 2023-04-25 | 中国电建集团贵阳勘测设计研究院有限公司 | Method for reading efficiency value of operation characteristic curve of water turbine |
| CN109143893A (en) * | 2018-09-19 | 2019-01-04 | 国网湖南省电力有限公司 | A kind of Turbine Behavior acquisition methods based on protype measurement |
| CN109143893B (en) * | 2018-09-19 | 2021-06-15 | 国网湖南省电力有限公司 | Water turbine characteristic acquisition method based on real machine actual measurement |
| CN110516321A (en) * | 2019-08-06 | 2019-11-29 | 西安理工大学 | A kind of speed turbine runner calculation for condenser selection |
| CN110889223A (en) * | 2019-11-27 | 2020-03-17 | 西安理工大学 | Efficiency optimization method of Kaplan turbine by taking rotating speed and paddle opening as variables |
| CN113849936A (en) * | 2021-09-30 | 2021-12-28 | 武汉大学 | Method for determining optimal rotating speed of water pump in large-range speed reduction operation |
| CN113849936B (en) * | 2021-09-30 | 2023-11-10 | 武汉大学 | Method for determining optimal rotation speed of water pump in large-range speed-reducing operation |
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