CN110374721A - A kind of diesel exhaust gas infrared inhibition device based on injection falling temperature technique - Google Patents
A kind of diesel exhaust gas infrared inhibition device based on injection falling temperature technique Download PDFInfo
- Publication number
- CN110374721A CN110374721A CN201910499554.3A CN201910499554A CN110374721A CN 110374721 A CN110374721 A CN 110374721A CN 201910499554 A CN201910499554 A CN 201910499554A CN 110374721 A CN110374721 A CN 110374721A
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- China
- Prior art keywords
- inflow entrance
- pipe
- mixing tube
- exhaust gas
- diesel exhaust
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/08—Other arrangements or adaptations of exhaust conduits
- F01N13/082—Other arrangements or adaptations of exhaust conduits of tailpipe, e.g. with means for mixing air with exhaust for exhaust cooling, dilution or evacuation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/20—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having flared outlets, e.g. of fish-tail shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/05—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of air, e.g. by mixing exhaust with air
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
The invention discloses a kind of diesel exhaust gas infrared inhibition devices based on injection falling temperature technique, including convergent nozzle, secondary inflow entrance pipe, mixing tube, vortex generator, expansion pipe, described convergent nozzle one end is connected with diesel exhaust gases mouthful, the other end connects time intermediate main flow inlet of inflow entrance pipe, the external circumferential that the secondary inflow entrance pipe is located therein main flow inlet is provided with time inflow entrance, the mixing tube front end connects time outlet of inflow entrance pipe, the import of rear end connection expansion pipe, the vortex generator is set in the mixing tube, the vortex generator includes that with the mixing tube axis vertically disposed vortex column occurs for multiple be fixed on the mixing inside pipe wall, the outlet of the expansion pipe is connected with atmosphere.Temperature can be effectively reduced after passing through the device in diesel engine vent gas, to achieve the effect that infrared suppressing, the infrared stealth ability of weaponry is effectively improved, to improve weaponry battlefield survival.
Description
Technical field
The invention belongs to infrared stealth technology field, in particular to a kind of diesel exhaust gas based on injection falling temperature technique is red
Outer inhibition device.
Background technique
In modern war, the Stealth Fighter of weaponry largely determines the battlefield existence energy of weaponry
Power, and then can determine outcome of a war.For the equipment of advocating war of ground force, generallys use diesel engine and come as main power
Source, but the higher delivery temperature of diesel engine significantly improves the air themperature around the exhaust outlet of weaponry, is easy
It is found by the infrared detection device of enemy, is unfavorable for the infrared stealth of equipment.
The existing infrared suppressing method for exhaust system mostly uses water cooling and mixing air method, and wherein water cooling needs
A large amount of water is consumed, for the weaponry of land operation and is not suitable for, mixing air method is more applicable, the prior art
Mixing air fado uses the design of lobe nozzle, and structure is excessively complicated and mixing efficiency is not high, is unfavorable for changing for existing weaponry and equipment
Dress.
Summary of the invention
A kind of the purpose of the present invention is to provide structures simple, the high diesel engine based on injection falling temperature technique of mixing efficiency
Exhausted IR inhibits device.
Used technical solution is as follows in order to solve the above problem by the present invention: a kind of diesel engine based on injection falling temperature technique
Exhausted IR inhibits device, including convergent nozzle, secondary inflow entrance pipe, mixing tube, vortex generator, expansion pipe, the tapered spray
Pipe one end is connected with diesel exhaust gases mouthful, and the other end connects time intermediate main flow inlet of inflow entrance pipe, the secondary inflow entrance pipe position
The external circumferential of in-between main flow inlet is provided with time inflow entrance, the mixing tube front end connect time outlet of inflow entrance pipe,
The import of rear end connection expansion pipe, the vortex generator are set in the mixing tube, and the vortex generator includes multiple
It is fixed on the mixing inside pipe wall and column, the outlet of the expansion pipe occurs with the vertically disposed vortex of the mixing tube axis
It is connected with atmosphere.
Further, it is straight line cylinder or waveform cylinder that column, which occurs, for the vortex.
Further, it is 3 that column quantity, which occurs, for the vortex, and 3 vortex occur column and are located on same vertical plane.
Further, the ratio of the convergent nozzle inlet diameter and outlet diameter is 5:1.
Further, the secondary inflow entrance pipe includes the secondary circulation road connecting with the secondary inflow entrance, the secondary circulation road
It is at 45 ° with flow direction of exhaust gases.
Further, the diameter of the mixing tube is greater than the outlet diameter of convergent nozzle.
Further, the inlet diameter of the expansion pipe and the ratio of outlet diameter are 1:2.
Compared with prior art, the invention has the following advantages:
(1) after diesel exhaust gas enters convergent nozzle, with the reduction of nozzle section product, gas flow rate is gradually increased, by
Bernoulli equation it is found that with gas flow rate increase, gas-static constantly reduces, and is conducive in the intermediate main of secondary inflow entrance pipe
Negative pressuren zone is formed at inflow entrance, aspirates cool ambient air, while being conducive to gas and being turned to twist from laminar flow to turbulent flow, promotion and low temperature
The mixing of air；
(2) secondary inflow entrance pipe can the Cryogenic air in atmosphere enter in mixing tube to be mixed with high-temperature tail gas,
To reduce the temperature of diesel engine vent gas；
(3) vortex generator is vortexed using fluid flow-disturbing occurs trailing vortex caused by column to promote high-temperature tail gas and low temperature empty
The energy exchange of gas, momentum-exchange enhance mixed effect, further decrease high-temperature tail gas temperature；
(4) area for expanding tube inlet is less than the area of outlet, and when fluid flows through expansion pipe, hydrostatic pressure is increased, stream
Speed reduces, and is conducive to high-temperature gas and mixes with the further of tail gas.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to figure, the present invention is described in further detail.
Detailed description of the invention
Fig. 1 is the cross-sectional view of the diesel exhaust gas infrared inhibition device the present invention is based on injection falling temperature technique.
Fig. 2 is the main view of vortex generator.
In figure: 1. convergent nozzles, 2. inflow entrance pipes, 3. mixing tubes, 4. vortex generators, 4-1. vortex generation column, 5.
Expansion pipe.
Specific embodiment
In order to be better understood by technology contents of the invention, spy lifts specific embodiment and institute's attached drawing is cooperated to be described as follows.
As shown in Figure 1, a kind of diesel exhaust gas infrared inhibition device based on injection falling temperature technique, including convergent nozzle 1,
Secondary inflow entrance pipe 2, mixing tube 3, vortex generator 4, expansion pipe 5, described 1 one end of convergent nozzle are connected with diesel exhaust gases mouthful,
The other end connects time intermediate main flow inlet of inflow entrance pipe 2, and the secondary inflow entrance pipe 2 is located therein the outside week of main flow inlet
To being provided with time inflow entrance, secondary inflow entrance pipe 2 can make the Cryogenic air in atmosphere enter in mixing tube 3 and high-temperature tail gas into
Row mixing, to reduce the temperature of diesel engine vent gas, 3 front end of mixing tube connects time outlet of inflow entrance pipe 2, rear end connection
The import of pipe 5 is expanded, the vortex generator 4 is set in the mixing tube 3, and the vortex generator 4 includes multiple fixations
In column 4-1 occurs with the vertically disposed vortex of 3 axis of mixing tube on 3 inner wall of mixing tube, the expansion pipe 5 goes out
Mouth is connected with atmosphere.
In conjunction with Fig. 2, it is straight line cylinder that column 4-1, which occurs, for the vortex, is also possible to waveform cylinder and further promotes to be vortexed
Formation, it is 3 that column 4-1 quantity, which occurs, for the vortex, and 3 vortex generation column 4-1 are located on same vertical plane symmetrical cloth arranged side by side
It sets, vortex generator 4 is vortexed using fluid flow-disturbing occurs trailing vortex caused by column 4-1 to promote high-temperature tail gas and Cryogenic air
Energy exchange, momentum-exchange enhance mixed effect, further decrease high-temperature tail gas temperature.
Further, the ratio of 1 inlet diameter of convergent nozzle and outlet diameter is 5:1, and diesel exhaust gas, which enters, to be subtracted
After contracting jet pipe, with the reduction of nozzle section product, gas flow rate is gradually increased, by Bernoulli equation it is found that with gas flow rate
Increase, gas-static constantly reduces, and is conducive to form negative pressuren zone at secondary inflow entrance, aspirates cool ambient air, while advantageous
There is laminar flow to turn to twist to turbulent flow in gas, promotes the mixing with Cryogenic air；The inlet diameter and outlet diameter of the expansion pipe 5
Ratio be 1:2, when fluid flows through expansion pipe 5, hydrostatic pressure is increased, and flow velocity reduces, and is conducive to high-temperature gas and tail gas
Further mixing.
Further, the secondary inflow entrance pipe 2 includes the secondary circulation road connecting with the secondary inflow entrance, the secondary circulation road
It is at 45 ° with flow direction of exhaust gases.
Further, the diameter of the mixing tube 3 is greater than the outlet diameter of convergent nozzle 1, when gas has decrement jet pipe spray
When out, the pressure loss is can be effectively reduced in biggish mixed tube diameter, while being conducive to the suction of air.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of diesel exhaust gas infrared inhibition device based on injection falling temperature technique, which is characterized in that including convergent nozzle
(1), secondary inflow entrance pipe (2), mixing tube (3), vortex generator (4), expansion pipe (5), described convergent nozzle (1) one end and diesel oil
Machine exhaust outlet is connected, and the other end connects the intermediate main flow inlet of time inflow entrance pipe (2), and the secondary inflow entrance pipe (2) is located therein
Between the external circumferential of main flow inlet be provided with time inflow entrance, mixing tube (3) front end connect time inflow entrance pipe (2) outlet,
The import of rear end connection expansion pipe (5), the vortex generator (4) are set in the mixing tube (3), the vortex generator
It (4) include that with the mixing tube (3) axis vertically disposed vortex column occurs for multiple be fixed on the mixing tube (3) inner wall
The outlet of (4-1), the expansion pipe (5) are connected with atmosphere.
2. the diesel exhaust gas infrared inhibition device according to claim 1 based on injection falling temperature technique, which is characterized in that
It is straight line cylinder or waveform cylinder that column (4-1), which occurs, for the vortex.
3. the diesel exhaust gas infrared inhibition device according to claim 2 based on injection falling temperature technique, which is characterized in that
It is 3 that column (4-1) quantity, which occurs, for the vortex, and 3 vortex occur column (4-1) and are located on same vertical plane.
4. the diesel exhaust gas infrared inhibition device according to claim 1-3 based on injection falling temperature technique,
It is characterized in that, the ratio of convergent nozzle (1) inlet diameter and outlet diameter is 5:1.
5. the diesel exhaust gas infrared inhibition device according to claim 1 based on injection falling temperature technique, which is characterized in that
The secondary inflow entrance pipe (2) includes the secondary circulation road connecting with the secondary inflow entrance, the secondary circulation road and flow direction of exhaust gases
It is at 45 °.
6. the diesel exhaust gas infrared inhibition device according to claim 1 based on injection falling temperature technique, which is characterized in that
The diameter of the mixing tube (3) is greater than the outlet diameter of convergent nozzle (1).
7. the diesel exhaust gas infrared inhibition device according to claim 4 based on injection falling temperature technique, which is characterized in that
The inlet diameter of the expansion pipe (5) and the ratio of outlet diameter are 1:2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499554.3A CN110374721A (en) | 2019-06-11 | 2019-06-11 | A kind of diesel exhaust gas infrared inhibition device based on injection falling temperature technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910499554.3A CN110374721A (en) | 2019-06-11 | 2019-06-11 | A kind of diesel exhaust gas infrared inhibition device based on injection falling temperature technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110374721A true CN110374721A (en) | 2019-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910499554.3A Pending CN110374721A (en) | 2019-06-11 | 2019-06-11 | A kind of diesel exhaust gas infrared inhibition device based on injection falling temperature technique |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340559A (en) * | 2021-06-10 | 2021-09-03 | 中山大学 | Supersonic velocity spray pipe aerodynamic force measurement system |
| CN114215984A (en) * | 2021-12-14 | 2022-03-22 | 拓荆科技股份有限公司 | Semiconductor equipment and gas conveying structure thereof |
Citations (4)
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|---|---|---|---|---|
| CN206054048U (en) * | 2016-05-23 | 2017-03-29 | 中国人民解放军装甲兵工程学院 | A kind of exhaust cooling device |
| CN106640285A (en) * | 2016-12-06 | 2017-05-10 | 济南吉美乐电源技术有限公司 | Air-discharging, flow-mixing and cooling infrared stealth device for electric power plant with internal combustion engine |
| CN108317010A (en) * | 2018-03-30 | 2018-07-24 | 常州蓝森环保设备有限公司 | A kind of exhaust injection device |
| WO2018234027A1 (en) * | 2017-06-19 | 2018-12-27 | Volkswagen Aktiengesellschaft | Exhaust pipe, internal combustion engine, and motor vehicle |
-
2019
- 2019-06-11 CN CN201910499554.3A patent/CN110374721A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN206054048U (en) * | 2016-05-23 | 2017-03-29 | 中国人民解放军装甲兵工程学院 | A kind of exhaust cooling device |
| CN106640285A (en) * | 2016-12-06 | 2017-05-10 | 济南吉美乐电源技术有限公司 | Air-discharging, flow-mixing and cooling infrared stealth device for electric power plant with internal combustion engine |
| WO2018234027A1 (en) * | 2017-06-19 | 2018-12-27 | Volkswagen Aktiengesellschaft | Exhaust pipe, internal combustion engine, and motor vehicle |
| CN108317010A (en) * | 2018-03-30 | 2018-07-24 | 常州蓝森环保设备有限公司 | A kind of exhaust injection device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113340559A (en) * | 2021-06-10 | 2021-09-03 | 中山大学 | Supersonic velocity spray pipe aerodynamic force measurement system |
| CN114215984A (en) * | 2021-12-14 | 2022-03-22 | 拓荆科技股份有限公司 | Semiconductor equipment and gas conveying structure thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191025 |
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| RJ01 | Rejection of invention patent application after publication |