CN109738192B - Control system for wall surface temperature of spray collision experiment in constant-volume combustion bomb - Google Patents
Control system for wall surface temperature of spray collision experiment in constant-volume combustion bomb Download PDFInfo
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- CN109738192B CN109738192B CN201811589844.9A CN201811589844A CN109738192B CN 109738192 B CN109738192 B CN 109738192B CN 201811589844 A CN201811589844 A CN 201811589844A CN 109738192 B CN109738192 B CN 109738192B
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Abstract
The invention discloses a control system for wall surface temperature in a wall-collision experiment of spray in a constant-volume combustion bomb, which relates to the field of power machinery spray combustion and comprises high-temperature-resistant glass, a wall surface cooling jacket, a cooling liquid pump, a throttle valve, a cooling liquid pipeline and a temperature sensor; the high-temperature resistant glass flat wall is arranged on the wall surface cooling jacket, the temperature sensor is arranged on an inlet and outlet pipeline of the wall surface cooling jacket to measure the temperature of the cooling liquid in the pipeline, the temperature sensor is connected with the ECU, and the temperature of the cooling liquid at the inlet and outlet of the wall surface cooling jacket is fed back to the ECU; a cooling liquid pipeline at the inlet of the wall surface cooling jacket is provided with a flow sensor and a throttle valve, and the other end of the cooling liquid pipeline is connected with a cooling liquid pump; and the cooling liquid in the cooling liquid pipeline at the outlet of the wall surface cooling jacket flows back to the cooling liquid storage tank. The cooling system is simple to control, and can adjust the circulating flow of the cooling liquid according to the temperature feedback of the cooling liquid at the inlet and the outlet of the wall surface cooling jacket, thereby realizing the accurate control of the temperature of the wall surface of the high-temperature resistant glass.
Description
Technical Field
The invention relates to the research fields of basic combustion, combustion of power machinery and the like, in particular to a cooling system for a high-temperature-resistant glass wall surface in a constant-volume combustion bomb inner spray wall collision experimental device.
Background
With the global energy crisis and the aggravated influence of environmental pollution, it is particularly important to strengthen the understanding of the engine spray combustion process, improve the engine combustion and reduce the pollutant emission; because the spray combustion in the engine is difficult to research due to the complex shape of the combustion chamber and the dynamic working condition environment, many researchers first develop the research on the spray combustion characteristic in the static environment through a constant volume combustion bomb, and therefore the spray impact wall research becomes one of the research hotspots.
Most of the wall surfaces applied in the current research can not control the temperature, but the high-temperature environment in the constant volume bomb and the heat conduction of spray combustion can lead the temperature of the wall surface collided by the spray to change violently, and the temperature of the wall surface has important influence on the spray combustion process, particularly the soot generation process, so that the effective control on the temperature of the wall surface is very important.
Disclosure of Invention
In order to solve the problem that the wall surface temperature is uncontrollable in the process of carrying out a spraying wall-collision experiment based on a constant-volume combustion bomb, the invention provides a system which can regulate the circulation flow of cooling liquid according to the temperature feedback of the cooling liquid at the inlet and the outlet of a wall surface cooling jacket, thereby realizing the accurate control of the wall surface temperature, and meanwhile, the invention can realize the visualization of the combustion process by arranging high-temperature resistant glass.
The technical purpose is realized by the following technical means:
a control system for the wall temperature of a spray wall-collision experiment in a constant-volume combustion bomb comprises a flat plate, a wall cooling jacket, a cooling liquid pipeline and a temperature sensor; the wall cooling jacket is arranged below the constant volume cylinder cover through a fixing support, cooling liquid is led into the wall cooling jacket through a cooling liquid pipeline, and a flat plate is arranged on the wall cooling jacket.
Further, the flat plate is made of high-temperature-resistant glass.
Furthermore, the wall surface cooling jacket is arranged in the constant volume bomb, and the whole spraying wall collision experiment is carried out in a closed environment in the constant volume combustion bomb.
Furthermore, the wall surface cooling jacket is of a hollow groove structure, and a circular through hole is formed in the center of the groove.
Furthermore, the inlet section and the outlet section of the cooling liquid pipeline are both provided with temperature sensors.
Furthermore, a flow sensor is arranged at the inlet section of the cooling liquid pipeline, and is used for monitoring the flow of the cooling liquid entering the wall surface cooling jacket in real time and feeding the flow back to the ECU.
Further, the cooling liquid pipeline is connected with a cooling liquid pump.
Further, the ECU is characterized in that the ECU receives and analyzes a temperature signal of the temperature sensor so as to adjust the flow speed of the cooling liquid pump.
Furthermore, the wall surface cooling jacket is made of an aluminum alloy material.
Furthermore, a reflector of 45 degrees is arranged at the bottom of the constant volume bomb cylinder, and images on the front side of the constant volume bomb spray can be reflected to an externally arranged camera through the reflector.
The invention has the beneficial effects that:
1. the cooling system for the high-temperature-resistant glass wall surface in the constant-volume combustion bomb spraying wall-collision experimental device is simple to control, the circulation flow of the cooling liquid can be adjusted according to the temperature feedback of the cooling liquid of the inlet and the outlet of the wall surface cooling jacket, so that the accurate control of the temperature of the flat plate wall surface is realized, the static error of the flat plate temperature is controlled within the reasonable range of 2 ℃, and the control accuracy is high.
2. The high-temperature-resistant glass is adopted, so that a visual angle can be provided for convenient observation and combustion observation, and the experimental process can be presented in real time.
Drawings
FIG. 1 is a sectional view of the general structure of a high temperature resistant glass wall surface cooling system used in a constant volume combustion bomb inner spray wall collision experimental apparatus according to the present invention;
FIG. 2 is a cross-sectional view of the wall cooling jacket of FIG. 1 in accordance with the present invention;
FIG. 3 is a cross-sectional view of the refractory glass of FIG. 1 mounted in a wall cooling jacket according to the present invention.
The reference numbers are as follows:
1. a flat plate; 2. a wall surface cooling jacket; 3. a coolant storage tank; 4. a coolant pump; 5. a throttle valve; 6. a coolant line; 7. a flow sensor; 8. a temperature sensor; 9. an ECU electronic control unit; 10. and fixing the bracket.
Detailed Description
For a further understanding of the present invention, reference is made to the following description taken in conjunction with the accompanying drawings.
An exemplary embodiment of the present invention is described with reference to fig. 1, 2, and 3. The size, material, shape, relative arrangement, and the like of the respective constituent elements described in the exemplary embodiments of the present invention are not intended to limit the technical scope of the present invention to them unless otherwise specified. It will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles of the invention, the scope of which is defined in the appended claims.
A cooling system for a high-temperature-resistant glass wall surface in a constant-volume combustion bomb inner spray wall-collision experimental device comprises high-temperature-resistant glass 1, a wall surface cooling jacket 2, a cooling liquid pipeline 6 and a temperature sensor 8; wall cooling jacket 2 sets up in constant volume cylinder cap below through fixed bolster 10, it has the coolant liquid to lead to through coolant liquid pipeline 6 in the wall cooling jacket 2, and wall cooling jacket 2 is overhead to have dull and stereotyped 1, and this dull and stereotyped 1's material is high temperature resistant glass.
The wall surface cooling jacket 2 is arranged in the constant volume bomb, and is closer to the actual working state in a closed environment, so that the experimental result is more reliable.
The wall surface cooling jacket 2 is of a hollow groove structure, and a circular through hole is formed in the center of the groove. This hollow recess type structure does benefit to high temperature resistant glass 1's stability on the one hand, and on the other hand coolant liquid is full of whole hollow recess for cooling to high temperature resistant glass 1 is swift more, has seted up the through-hole in the recess center in addition, makes things convenient for follow-up observation to the burning condition.
The inlet section and the outlet section of the cooling liquid pipeline 6 are both provided with temperature sensors 8, the inlet section of the cooling liquid pipeline 6 is also provided with a flow sensor 7, and the flow of the cooling liquid entering the wall surface cooling jacket 2 is monitored in real time and fed back to an ECU (electronic control unit) 9. The coolant line 6 is connected to the coolant pump 4. The ECU electronic control unit 9 receives the temperature signal from the temperature sensor 8 and analyzes it, thereby adjusting the flow rate of the coolant pump 4. The wall surface cooling jacket 2 is made of an aluminum alloy material. A reflector arranged at an angle of 45 degrees is arranged at the bottom of the constant volume bomb cylinder, and an image on the front side of the constant volume bomb spray is reflected to an externally placed camera through the reflector. Through set up the reflector at constant volume bullet cylinder bottom, the combustion condition in the reflection jar body that can be fine, the convenient control to the combustion condition.
The general structure section of the cooling system for the high-temperature-resistant glass wall surface in the constant-volume combustion bomb inner spray wall-collision experimental device is shown in the attached drawing 1.
The periphery of the high-temperature resistant glass 1 is wrapped by a wall surface cooling jacket 2 made of an aluminum alloy material; the wall surface cooling jacket 2 is fixed below the constant volume bomb by a fixing bracket 10; temperature sensors 8 are arranged on the inlet pipeline and the outlet pipeline of the wall surface cooling jacket 2 to measure the temperature of cooling liquid in the pipelines; the temperature sensor 8 is connected with the ECU (electronic control unit) 9 and feeds back the temperature of the cooling liquid at the inlet and the outlet of the wall surface cooling jacket 2 to the ECU 9; a cooling liquid pipeline 6 at the inlet of the wall surface cooling jacket 2 is provided with a flow sensor 7 and a throttle valve 5, the outlet of the cooling liquid pipeline 6 is connected with a cooling liquid pump 4, the flow sensor 7 is arranged at the inlet pipeline of the wall surface cooling jacket 2, and the flow sensor is used for monitoring and feeding back the flow of the cooling liquid supplied to the wall surface cooling jacket 2 to an ECU (electronic control unit) 9 in real time; the coolant pump 4 supplies a constant flow rate of coolant from the coolant storage tank 3 to the coolant line 6. The coolant pump 4 and the throttle valve 5 are connected to an ECU electronic control unit 9. The cooling liquid in the cooling liquid pipeline 6 at the outlet of the wall surface cooling jacket 2 flows back to the cooling liquid storage tank 3; when the temperature shown by the outlet temperature sensor 8 is far higher than the temperature shown by the inlet temperature sensor 8, the ECU (electronic control unit) 9 controls the rotation speed of the cooling liquid pump and the throttle valve to be increased so as to increase the flow rate of the cooling liquid and accelerate the wall surface cooling speed; when the temperature of the high-temperature resistant glass 1 rises, the ECU electronic control element 9 controls the throttle valve 5 to open, the flow of the cooling liquid supplied by the cooling liquid pump 4 from the cooling liquid storage tank 3 to the wall surface cooling jacket 2 is increased, the static error of temperature control is ensured to be less than 2 ℃, and when the temperature difference of the inlet and outlet temperature sensors is less than 2 degrees, the average value of the inlet and outlet cooling liquid temperature is calculated, and the wall surface temperature can be considered as the time.
And the structure of the cooling sleeve in the high-temperature-resistant glass wall surface cooling system used in the constant-volume combustion bomb inner spray wall-collision experimental device is shown in the sectional view in combination with the attached figure 2. The wall surface cooling jacket 2 is fixed on the constant volume combustion bomb experimental device through a fixing support 10; two sides of the wall surface cooling jacket 2 are connected with a cooling liquid pipeline 6, and the cooling liquid is conveyed to cool the high-temperature resistant glass wall surface 1; a round hole is opened at 2 centers of wall cooling overcoat, and the light path is unobstructed when being convenient for carry out the experiment of constant volume burning bullet spraying wall, and the shooting system of being convenient for openly shoots the experiment condition of wall of bumping in the spraying.
And the attached figure 3 is a structural sectional view of the high-temperature-resistant glass in the high-temperature-resistant glass wall surface cooling system in the constant-volume combustion bomb inner spray wall collision experimental device installed on the cooling sleeve. The high-temperature-resistant glass 1 is of a circular sheet structure, and the periphery of the high-temperature-resistant glass is wrapped by a wall surface cooling jacket 2 made of an aluminum alloy material; the wall surface cooling jacket 2 is fixed on the constant volume combustion bomb experimental device through a wall surface cooling jacket fixing support 10; two sides of the wall surface cooling jacket 2 are connected with a cooling liquid pipeline 6, and the cooling liquid is conveyed to cool the high-temperature resistant glass wall surface 1; a round hole is opened to 2 lower extremes of wall cooling overcoat, and the light path is unobstructed when being convenient for carry out the experiment of constant volume burning bullet spraying wall, and the shooting system of being convenient for openly shoots the experiment condition of wall collision spraying.
The working principle is as follows: comparing the temperature T1 and the temperature T2 respectively measured by temperature sensors arranged at the inlet and the outlet of the cooling jacket by adopting a method of comparing a sampling value with a key set value, wherein when the temperature on the high-temperature resistant glass flat plate is equal to or less than the lower limit of a preset temperature, namely the static error of temperature control at the inlet and the outlet of the wall surface cooling jacket is less than 2 ℃, the ECU electronic control element 9 maintains the current flow of the cooling liquid supplied from the cooling liquid storage tank 3 to the wall surface cooling jacket 2; if the difference between the two is more than 2 ℃, the ECU controls the increase of the rotating speed of the cooling liquid pump and the expansion of the throttle valve so as to increase the flow of the cooling liquid and accelerate the wall surface cooling speed. If the difference between the two is less than or equal to 2 ℃, the average value of the temperatures of the inlet and outlet cooling liquids can be regarded as the wall temperature at the moment, and the ECU feeds back the cooling liquid pump to continuously maintain the flow rate of the cooling liquid output by the current cooling liquid pump, so that the static error of the temperature of the wall surface of the high-temperature resistant glass is controlled within a reasonable range of 2 ℃.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
The present invention is not limited to the above-described embodiments, and any obvious improvements, substitutions or modifications can be made by those skilled in the art without departing from the spirit of the present invention.
Claims (7)
1. A control system for the wall temperature of a spray wall-collision experiment in a constant-volume combustion bomb is characterized by comprising a flat plate (1), a wall cooling jacket (2), a cooling liquid pipeline (6) and a temperature sensor (8); the wall surface cooling jacket (2) is arranged below the constant volume combustion bomb cover through a fixing support (10), cooling liquid is introduced into the wall surface cooling jacket (2) through a cooling liquid pipeline (6), and a flat plate (1) is arranged on the wall surface cooling jacket (2); the flat plate (1) is made of high-temperature-resistant glass; the wall surface cooling jacket (2) is arranged in the constant volume combustion bomb, and the whole spraying wall collision experiment is carried out in a closed environment in the constant volume combustion bomb; the wall surface cooling jacket (2) is of a hollow groove structure, and a circular through hole is formed in the center of the groove; the periphery of the flat plate (1) is coated in the groove structure.
2. The control system for the wall-collision experiment wall temperature of the spray in the constant-volume combustion bomb according to claim 1, wherein the inlet section and the outlet section of the cooling liquid pipeline (6) are provided with temperature sensors (8).
3. The control system for the wall temperature in the wall collision experiment of the spray in the constant volume combustion bomb according to claim 1, characterized in that the inlet section of the cooling liquid pipeline (6) is further provided with a flow sensor (7) for monitoring in real time and feeding back the flow of the cooling liquid entering the wall cooling jacket (2) to the ECU (9).
4. The control system for the wall-collision experiment wall temperature of the spray in the constant-volume combustion bomb according to claim 1, wherein the cooling liquid pipeline (6) is connected with a cooling liquid pump (4).
5. The control system for the wall temperature of the spray impact experiment in the constant volume combustion bomb according to claim 4, wherein the ECU (9) receives and analyzes the temperature signal of the temperature sensor (8), so as to adjust the cooling liquid pump (4) to control the flow speed of the cooling liquid.
6. The system for controlling the wall surface temperature in the spray wall-collision experiment in the constant volume combustion bomb according to any one of claims 1 to 4, wherein the wall surface cooling jacket (2) is made of aluminum alloy material.
7. The system for controlling the temperature of the inner spray wall-collision experiment wall surface of the constant volume combustion bomb according to claim 1, wherein a reflector of 45 degrees is arranged at the bottom of the cylinder of the constant volume combustion bomb, and an image of the front spray surface of the constant volume bomb can be reflected to an externally placed camera through the reflector.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811589844.9A CN109738192B (en) | 2018-12-25 | 2018-12-25 | Control system for wall surface temperature of spray collision experiment in constant-volume combustion bomb |
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| CN201811589844.9A CN109738192B (en) | 2018-12-25 | 2018-12-25 | Control system for wall surface temperature of spray collision experiment in constant-volume combustion bomb |
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| CN109738192B true CN109738192B (en) | 2021-02-12 |
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| CN110737292B (en) * | 2019-09-20 | 2021-01-15 | 江苏大学 | Wall surface temperature control system arranged in high-temperature and high-pressure container |
| CN116704846B (en) * | 2023-08-01 | 2023-10-31 | 应急管理部四川消防研究所 | Fire simulation experiment platform and application thereof |
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| CN106198027A (en) * | 2016-08-25 | 2016-12-07 | 广西大学 | A kind of constant volume bullet system of simulated engine spray burning |
| CN106932202A (en) * | 2017-05-19 | 2017-07-07 | 堀场仪器（上海）有限公司 | A kind of Temperature-controlled appliance for being applied to engine test |
| CN108827640A (en) * | 2018-06-26 | 2018-11-16 | 北京理工大学 | A kind of rebuffed experimental provision of gas-powered drop high speed |
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| CN2559951Y (en) * | 2002-08-20 | 2003-07-09 | 东北大学 | Metal sampler low-heat inertial acceleration heating device |
| CN106645283B (en) * | 2016-11-09 | 2023-04-07 | 吉林大学 | Temperature gradient controllable combustion bomb |
| CN107677480A (en) * | 2017-11-14 | 2018-02-09 | 吉林大学 | A kind of temperature can active control constant volume bullet heat-insulation system and its control method |
| CN108426453A (en) * | 2018-03-29 | 2018-08-21 | 广东盛达穗南环保科技有限公司 | Integrated combustion type perlite bloating plant based on spiral tube heat exchange |
| CN108413771A (en) * | 2018-04-27 | 2018-08-17 | 浙江凯盈新材料有限公司 | A kind of silver paste sintering furnace |
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Patent Citations (3)
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|---|---|---|---|---|
| CN106198027A (en) * | 2016-08-25 | 2016-12-07 | 广西大学 | A kind of constant volume bullet system of simulated engine spray burning |
| CN106932202A (en) * | 2017-05-19 | 2017-07-07 | 堀场仪器（上海）有限公司 | A kind of Temperature-controlled appliance for being applied to engine test |
| CN108827640A (en) * | 2018-06-26 | 2018-11-16 | 北京理工大学 | A kind of rebuffed experimental provision of gas-powered drop high speed |
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