CN112432533A - High-low pressure injection atomization enhanced heat exchange device - Google Patents
High-low pressure injection atomization enhanced heat exchange device Download PDFInfo
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- CN112432533A CN112432533A CN202011192673.3A CN202011192673A CN112432533A CN 112432533 A CN112432533 A CN 112432533A CN 202011192673 A CN202011192673 A CN 202011192673A CN 112432533 A CN112432533 A CN 112432533A
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- Prior art keywords
- pressure
- low
- heat exchange
- ram air
- exchange device
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B19/00—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour
- F25B19/02—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam
- F25B19/04—Machines, plants or systems, using evaporation of a refrigerant but without recovery of the vapour using fluid jet, e.g. of steam using liquid jet, e.g. of water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0021—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for aircrafts or cosmonautics
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/56—Heat recovery units
Abstract
The invention relates to the technical field of aircraft environmental control, in particular to a high-pressure and low-pressure injection atomization enhanced heat exchange device which comprises a high-pressure water separator (1), a high-pressure channel (2), a low-pressure water separator (3), a low-pressure channel (4), an injection atomization nozzle (5), a ram air channel (6) and a heat exchanger (7); the high-pressure and low-pressure injection atomization enhanced heat exchange device is adopted, so that the cold edge temperature of a heat exchanger in an aircraft environment control system can be reduced, and the refrigerating capacity of the environment control system is improved; meanwhile, when the environment control system is not in the maximum refrigeration working mode, the required ram air flow can be reduced, the flight resistance of the airplane is reduced, and the fuel consumption of the airplane is reduced; in addition, the high-pressure and low-pressure injection atomization enhanced heat exchange device can save an additional high-pressure bleed air pipeline for atomizing water flow, can reduce bleed air loss required by drainage atomization of the low-pressure water separator, and can reduce the weight of the device.
Description
Technical Field
The invention relates to the technical field of aircraft environmental control, in particular to a high-low pressure injection atomization enhanced heat exchange device.
Background
In the refrigeration subsystem of the aircraft environment control system, in order to enhance the refrigeration performance, water discharged by the water separator needs to be sprayed to the cold edge of the heat exchanger, one path of high-pressure air is introduced to carry out injection atomization, the latent heat of vaporization of the water is used for reducing the temperature of the cold edge of the heat exchanger, and the refrigeration performance is improved. Because need lead a way high-pressure air specially, can cause the bleed loss, increased pipeline weight simultaneously, need carry out technological innovation.
Disclosure of Invention
The purpose of the invention is as follows: the requirement for enhancing the heat exchange performance of a refrigeration subsystem of an aircraft environment control system is met, the problem of extra working medium and weight loss caused by water spraying and atomizing by adopting high-pressure bleed air is solved, and the purposes of reducing the power consumption of the environment control system, reducing the weight of equipment and improving the fuel consumption of the aircraft are achieved.
Technical scheme
The high-pressure and low-pressure injection atomization enhanced heat exchange device comprises a high-pressure water separator (1), a high-pressure channel (2), a low-pressure water separator (3), a low-pressure channel (4), an injection atomization nozzle (5), a ram air channel (6) and a heat exchanger (7);
the injection atomizing nozzle (5) is of a tubular structure, one end of the tubular structure is a high-pressure inlet, the other end of the tubular structure is a liquid mist jet orifice, and a contracted throat is formed between the high-pressure inlet and the liquid mist jet orifice; a low-pressure inlet is formed in the side wall of the tubular structure, and the low-pressure inlet is arranged between the throat and the liquid mist spraying port;
the liquid fog jet orifice of the injection atomizing nozzle is communicated to the ram air channel (6) and is positioned at the upstream of the heat exchanger (7);
the high-pressure inlet of the injection atomizing nozzle is communicated with the high-pressure channel (2);
the low-pressure inlet of the injection atomizing nozzle is communicated with the low-pressure channel (2);
the heat exchanger (7) is arranged between the ram air channel and a bleed air high-temperature pipeline of the environment control system to form heat exchange;
the high-pressure water separator (1) is communicated with a high-pressure inlet of the injection atomizing nozzle through a high-pressure passage (2), and the low-pressure water separator (1) is communicated with a low-pressure inlet of the injection atomizing nozzle through a low-pressure passage (2);
the medium pressure discharged by the high-pressure water separator (1) and the maximum medium pressure in the ram air channel meet a relational expression, Q is more than or equal to 1.89P, Q is the medium pressure discharged by the high-pressure water separator (1), and P is the maximum medium pressure in the ram air channel. The invention can meet the condition that Q is more than or equal to 1.89P, the throat of the injection atomizing nozzle works in the critical state of the circulation capacity, air is accelerated to the sonic speed at the throat, and high-speed airflow collides with water flow from a low-pressure inlet of the injection atomizing nozzle to generate fine water drops, so that water can be quickly gasified to absorb heat, the cold edge temperature of the heat exchanger is reduced, and the heat exchange performance of the heat exchanger is improved.
Furthermore, a flow rate regulating device is arranged in the ram air channel, and a ram air flow rate regulating device is arranged at the upstream of the liquid fog jet orifice and can regulate the flow rate in the ram air channel. When the environment control system is in the maximum refrigeration working mode, the ram air flow adjusting device is in a full-open state, and when the environment control system is not in the maximum refrigeration working mode, the opening degree of the ram air flow adjusting device is reduced, so that the flight resistance of the airplane can be reduced, and the fuel consumption of the airplane is reduced.
Furthermore, the opening direction of the low-pressure inlet and the jet direction of the throat outlet form an included angle, and the included angle is more than 60 degrees. Preferably 90. The injection atomizing nozzle atomizes water flow by using a high-speed air flow loader, when an included angle is too small, the atomizing effect is poor, when the included angle is 90 degrees, the atomizing effect is good, if the included angle exceeds 90 degrees, the flowing medium is easy to generate large flowing resistance.
Furthermore, the injection atomizing nozzle is simultaneously used as a flow limiting device of the high-pressure water separator. Since the pressure of the medium in the high-pressure channel connected with the high-pressure water separator is usually above 300kPa (A), if no flow limiting device is arranged, a large amount of high-pressure air is lost, and the performance of an airplane environment control system is reduced. When the injection atomizing nozzle is in an adjacent state, the throat is in a flow limiting state, the flow limiting function of the air medium in the drainage pipeline of the high-pressure water separator can be achieved, and an additional flow limiting device is not required to be added.
Furthermore, the throat is made of a high-hardness material, and the hardness of the high-hardness material is higher than HRC 38. The high-hardness material can ensure that the throat of the injection atomizing nozzle is not abraded and enlarged after being used for a long time, and the flow limiting characteristic is changed.
Furthermore, the diameter of the throat is 1 mm-3 mm.
Furthermore, the included angle between the spraying direction of the liquid fog spraying opening of the injection atomizing nozzle and the flow direction of the ram air channel (6) is smaller than 90 degrees, so that the media are converged and do not interfere with each other.
By adopting the high-low pressure injection atomization enhanced heat exchange device, the cold side temperature of a heat exchanger in an aircraft environment control system can be reduced, and the refrigerating capacity of the environment control system is improved; meanwhile, when the environment control system is not in the maximum refrigeration working mode, the required ram air flow can be reduced, the flight resistance of the airplane is reduced, and the fuel consumption of the airplane is reduced; in addition, the high-pressure and low-pressure injection atomization enhanced heat exchange device can save an additional high-pressure air-entraining pipeline for atomizing water flow, can reduce air-entraining loss required by drainage atomization of the low-pressure water separator, and can reduce the weight of the device.
Advantageous effects
The high-pressure and low-pressure injection atomization enhanced heat exchange device is adopted, so that the cold edge temperature of a heat exchanger in an aircraft environment control system can be reduced, and the refrigerating capacity of the environment control system is improved; meanwhile, when the environment control system is not in the maximum refrigeration working mode, the required ram air flow can be reduced, the flight resistance of the airplane is reduced, and the fuel consumption of the airplane is reduced; in addition, the high-pressure and low-pressure injection atomization enhanced heat exchange device can save an additional high-pressure bleed air pipeline for atomizing water flow, can reduce bleed air loss required by drainage atomization of the low-pressure water separator, and can reduce the weight of the device.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of embodiment 1;
FIG. 3 is a schematic view of an injection atomizing nozzle in accordance with example 1;
FIG. 4 is a schematic structural view of embodiment 2;
FIG. 5 is a schematic view of an injection atomizing nozzle in accordance with example 2;
wherein: the device comprises a high-pressure water separator 1, a high-pressure channel 2, a low-pressure water separator 3, a low-pressure channel 4, an injection atomizing nozzle 5, a ram air channel 6, a heat exchanger 7 and a ram air flow adjusting device 8.
Detailed Description
the injection atomizing nozzle (5) is of a tubular structure, one end of the tubular structure is a high-pressure inlet, the other end of the tubular structure is a liquid mist jet orifice, and a contracted throat is formed between the high-pressure inlet and the liquid mist jet orifice; a low-pressure inlet is formed in the side wall of the tubular structure, and the low-pressure inlet is arranged between the throat and the liquid mist spraying port;
the liquid fog jet orifice of the injection atomizing nozzle is communicated to the ram air channel (6) and is positioned at the upstream of the heat exchanger (7);
the high-pressure inlet of the injection atomizing nozzle is communicated with the high-pressure channel (2);
the low-pressure inlet of the injection atomizing nozzle is communicated with the low-pressure channel (2);
the heat exchanger (7) is arranged between the ram air channel and a bleed air high-temperature pipeline of the environment control system to form heat exchange;
the high-pressure water separator (1) is communicated with a high-pressure inlet of the injection atomizing nozzle through a high-pressure passage (2), and the low-pressure water separator (1) is communicated with a low-pressure inlet of the injection atomizing nozzle through a low-pressure passage (2);
the medium pressure discharged by the high-pressure water separator (1) and the maximum medium pressure in the ram air channel meet a relational expression, Q is more than or equal to 1.89P, Q is the medium pressure discharged by the high-pressure water separator (1), and P is the maximum medium pressure in the ram air channel. The invention can meet the condition that Q is more than or equal to 1.89P, the throat of the injection atomizing nozzle works in the critical state of the circulation capacity, air is accelerated to the sonic speed at the throat, and high-speed airflow collides with water flow from a low-pressure inlet of the injection atomizing nozzle to generate fine water drops, so that water can be quickly gasified to absorb heat, the cold edge temperature of the heat exchanger is reduced, and the heat exchange performance of the heat exchanger is improved.
The opening direction of the low-pressure inlet and the jet direction of the throat outlet form an included angle, and the included angle is 90 degrees. The injection atomizing nozzle is simultaneously used as a flow limiting device of the high-pressure water separator. The throat is made of a high-hardness material, and the hardness of the high-hardness material is higher than HRC 38. The diameter of the throat is 1.9 mm.
The included angle between the spraying direction of the liquid fog spraying opening of the injection atomizing nozzle and the flow direction of the ram air channel (6) is 90 degrees, so that the media are converged and do not interfere with each other.
the injection atomizing nozzle (5) is of a tubular structure, one end of the tubular structure is a high-pressure inlet, the other end of the tubular structure is a liquid mist jet orifice, and a contracted throat is formed between the high-pressure inlet and the liquid mist jet orifice; a low-pressure inlet is formed in the side wall of the tubular structure, and the low-pressure inlet is arranged between the throat and the liquid mist spraying port;
the liquid fog jet orifice of the injection atomizing nozzle is communicated to the ram air channel (6) and is positioned at the upstream of the heat exchanger (7);
the high-pressure inlet of the injection atomizing nozzle is communicated with the high-pressure channel (2);
the low-pressure inlet of the injection atomizing nozzle is communicated with the low-pressure channel (2);
the heat exchanger (7) is arranged between the ram air channel and a bleed air high-temperature pipeline of the environment control system to form heat exchange;
the high-pressure water separator (1) is communicated with a high-pressure inlet of the injection atomizing nozzle through a high-pressure passage (2), and the low-pressure water separator (1) is communicated with a low-pressure inlet of the injection atomizing nozzle through a low-pressure passage (2);
the medium pressure discharged by the high-pressure water separator (1) and the maximum medium pressure in the ram air channel meet a relational expression, Q is more than or equal to 1.89P, Q is the medium pressure discharged by the high-pressure water separator (1), and P is the maximum medium pressure in the ram air channel. The invention can meet the condition that Q is more than or equal to 1.89P, the throat of the injection atomizing nozzle works in the critical state of the circulation capacity, air is accelerated to the sonic speed at the throat, and high-speed airflow collides with water flow from a low-pressure inlet of the injection atomizing nozzle to generate fine water drops, so that water can be quickly gasified to absorb heat, the cold edge temperature of the heat exchanger is reduced, and the heat exchange performance of the heat exchanger is improved.
A flow regulating device is arranged in the ram air channel, and a ram air flow regulating device is arranged upstream of the liquid mist spray opening and can regulate the flow in the ram air channel. The opening direction of the low-pressure inlet and the spraying direction of the throat outlet form an included angle, the included angle is 80 degrees, and the injection atomizing nozzle is used as a flow limiting device of the high-pressure water separator.
The diameter of the throat is 2.5 mm.
The included angle between the spraying direction of the liquid fog spraying opening of the injection atomizing nozzle and the flow direction of the ram air channel (6) is smaller than 60 degrees, so that the media are converged and do not interfere with each other.
Claims (9)
1. A high-low pressure injection atomization enhanced heat exchange device comprises a high-pressure water separator (1), a high-pressure channel (2), a low-pressure water separator (3), a low-pressure channel (4), an injection atomization nozzle (5), a ram air channel (6) and a heat exchanger (7);
the injection atomizing nozzle (5) is of a tubular structure, one end of the tubular structure is a high-pressure inlet, the other end of the tubular structure is a liquid mist jet orifice, and a contracted throat is formed between the high-pressure inlet and the liquid mist jet orifice; a low-pressure inlet is formed in the side wall of the tubular structure, and the low-pressure inlet is arranged between the throat and the liquid mist jet orifice;
the liquid fog jet orifice of the injection atomizing nozzle is communicated to the ram air channel (6) and is positioned at the upstream of the heat exchanger (7);
the high-pressure inlet of the injection atomizing nozzle is communicated with the high-pressure channel (2);
the low-pressure inlet of the injection atomizing nozzle is communicated with the low-pressure channel (2);
the heat exchanger (7) is arranged between the ram air channel and a bleed air high-temperature pipeline of the environment control system to form heat exchange;
the high-pressure water separator (1) is communicated with a high-pressure inlet of the injection atomizing nozzle through a high-pressure passage (2), and the low-pressure water separator (1) is communicated with a low-pressure inlet of the injection atomizing nozzle through a low-pressure passage (2);
the medium pressure discharged by the high-pressure water separator (1) and the maximum medium pressure in the ram air channel meet a relational expression, Q is more than or equal to 1.89P, Q is the medium pressure discharged by the high-pressure water separator (1), and P is the maximum medium pressure in the ram air channel.
2. The high-low pressure ejection atomization enhanced heat exchange device of claim 1, which is characterized in that: a flow regulating device is arranged in the ram air channel, and a ram air flow regulating device is arranged upstream of the liquid mist spray opening and can regulate the flow in the ram air channel.
3. The high-low pressure ejection atomization enhanced heat exchange device of claim 1, which is characterized in that: the opening direction of the low-pressure inlet and the spraying direction of the throat outlet form an included angle, and the included angle is more than 60 degrees.
4. The high-low pressure ejection atomization enhanced heat exchange device of claim 3, which is characterized in that: the opening direction of the low-pressure inlet and the jet direction of the throat outlet form an included angle, and the included angle is 90 degrees.
5. The high-low pressure ejection atomization enhanced heat exchange device of claim 1, which is characterized in that: the injection atomizing nozzle is simultaneously used as a flow limiting device of the high-pressure water separator.
6. The high-low pressure ejection atomization enhanced heat exchange device of claim 1, which is characterized in that: the throat is made of a high-hardness material, and the hardness of the high-hardness material is higher than HRC 38.
7. The high-low pressure ejection atomization enhanced heat exchange device of claim 1, which is characterized in that: the diameter of the throat is 1 mm-3 mm.
8. The high-low pressure ejection atomization enhanced heat exchange device of claim 1, which is characterized in that: the included angle between the spraying direction of the liquid fog spraying opening of the injection atomizing nozzle and the flow direction of the ram air channel (6) is smaller than 90 degrees, so that the media are converged and do not interfere with each other.
9. The high-low pressure ejection atomization enhanced heat exchange device of claim 1, which is characterized in that: also included is a ram air flow regulating device (8) arranged upstream of the ram air channel (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192673.3A CN112432533A (en) | 2020-10-30 | 2020-10-30 | High-low pressure injection atomization enhanced heat exchange device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011192673.3A CN112432533A (en) | 2020-10-30 | 2020-10-30 | High-low pressure injection atomization enhanced heat exchange device |
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| CN112432533A true CN112432533A (en) | 2021-03-02 |
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| CN202011192673.3A Pending CN112432533A (en) | 2020-10-30 | 2020-10-30 | High-low pressure injection atomization enhanced heat exchange device |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1797937A1 (en) * | 2005-12-16 | 2007-06-20 | EADS Space Transportation GmbH | Device for temporarily storing condensed water |
| CN101881490A (en) * | 2009-05-05 | 2010-11-10 | 北京航空航天大学 | Novel aircraft environmental control system using high-pressure dehumidifying membrane component |
| CN105620761A (en) * | 2014-10-31 | 2016-06-01 | 中国航空工业集团公司西安飞机设计研究所 | Temperature and humidity integrated control device of small cabin |
| TW201720538A (en) * | 2015-12-10 | 2017-06-16 | 北京七星華創電子股份有限公司 | Cleaning device for atomizing and spraying liquid in two-phase flow |
| CN109246991A (en) * | 2018-10-12 | 2019-01-18 | 北京航空航天大学 | A kind of spray cooling system of aircraft periodicity high power density thermal force |
| CN209362206U (en) * | 2018-12-12 | 2019-09-10 | 中国华能集团清洁能源技术研究院有限公司 | A kind of efficient liquid atomization jetting device |
| CN110386253A (en) * | 2018-04-20 | 2019-10-29 | 空中客车作业有限公司 | Aircraft cooling system and aircraft with aircraft cooling system |
-
2020
- 2020-10-30 CN CN202011192673.3A patent/CN112432533A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1797937A1 (en) * | 2005-12-16 | 2007-06-20 | EADS Space Transportation GmbH | Device for temporarily storing condensed water |
| CN101881490A (en) * | 2009-05-05 | 2010-11-10 | 北京航空航天大学 | Novel aircraft environmental control system using high-pressure dehumidifying membrane component |
| CN105620761A (en) * | 2014-10-31 | 2016-06-01 | 中国航空工业集团公司西安飞机设计研究所 | Temperature and humidity integrated control device of small cabin |
| TW201720538A (en) * | 2015-12-10 | 2017-06-16 | 北京七星華創電子股份有限公司 | Cleaning device for atomizing and spraying liquid in two-phase flow |
| CN110386253A (en) * | 2018-04-20 | 2019-10-29 | 空中客车作业有限公司 | Aircraft cooling system and aircraft with aircraft cooling system |
| CN109246991A (en) * | 2018-10-12 | 2019-01-18 | 北京航空航天大学 | A kind of spray cooling system of aircraft periodicity high power density thermal force |
| CN209362206U (en) * | 2018-12-12 | 2019-09-10 | 中国华能集团清洁能源技术研究院有限公司 | A kind of efficient liquid atomization jetting device |
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