CN-121994497-A - Main combustion chamber full-temperature full-pressure performance test heat protection system and operation method

CN121994497ACN 121994497 ACN121994497 ACN 121994497ACN-121994497-A

Abstract

The heat protection system and the operation method for the full-temperature full-pressure performance test of the main combustion chamber can provide adjustable cooling water and cooling gas for a plurality of components such as a measuring section, a rotation control mechanism, an external pipeline of a test piece, a fuel pipeline and the like in the full-temperature full-pressure performance test process of the main combustion chamber, ensure the safe working of a test bed and the test piece, simultaneously reduce the cold source waste, reduce the time after the test, improve the test efficiency and reduce the energy waste.

Inventors

XIAO TIANMING
ZHANG JIFENG
WANG XINYAO
LI JIAAO
ZHAO MINGLONG
GE XIN
HAN YONGYONG
ZHAO YU
ZHANG YUGUANG
ZHANG MENG
XIAO YAO
PENG TAO

Assignees

中国航发沈阳发动机研究所

Dates

Publication Date: 20260508
Application Date: 20260303

Claims (8)

1. The heat protection system for the full-temperature full-pressure performance test of the main combustion chamber is characterized by comprising a cooling gas system; the cooling gas system comprises an air inlet pipeline, other gas inlet pipelines, a measuring section inlet pipeline and a fuel oil pipeline inlet pipeline; The inlet of the air inlet pipeline is connected with an air source, the outlet is divided into two branches, and the branches are respectively connected with the cooling air inlet of the outer pipeline of the test piece and the cooling air inlet of the measuring section rotation control mechanism; An air inlet valve (1), a water-cooled heat exchanger (2), heat exchanger outlet pressure and temperature measuring points (7), an outer pipeline group regulating valve (13) and an outer pipeline group pressure and temperature measuring point (14) are sequentially arranged on the air inlet pipeline; The inlets of other gas inlet pipelines are connected with an inert gas source, and an inert gas cut-off valve (8) and an inert gas electric valve (9) are sequentially arranged on the inert gas inlet pipelines; The inlet of the measuring section air inlet pipeline is connected with the outlets of other gas inlet pipelines, the outlets are connected with the cooling air inlet of the measuring section, and a gas switching valve (3), a main pipe pressure and temperature measuring point (18), a measuring section pipeline regulating valve (11) and a measuring section pipeline pressure and temperature measuring point (12) are sequentially arranged on the cooling air inlet of the measuring section; an air switching electromagnetic valve (10) is arranged between the air inlet pipeline and the air inlet pipeline of the measuring section for connection; The inlet of the gas pipeline is connected with the outlets of other gas inlet pipelines, the outlets are connected with the gas pipeline of the test piece, and an inert gas regulating valve (4), a gas drying filter (5), a cold blowing pressure and temperature measuring point (6) of the gas pipeline, a cold blowing hand valve (15) of the gas pipeline, a cold blowing one-way valve (16) of the gas pipeline and a cold blowing electromagnetic valve (17) of the gas pipeline are sequentially arranged on the gas pipeline.
2. The heat protection system for full temperature and full pressure performance test of a main combustion chamber as set forth in claim 1, wherein two branches of the air intake line outlet are communicated with the air intake line outlet through a three-way valve.
3. The heat protection system for the full-temperature full-pressure performance test of the main combustion chamber according to claim 2, wherein a node of the air switching electromagnetic valve (10) connected with an air inlet pipeline is positioned between a heat exchanger outlet pressure and temperature measuring point (7) and an outer pipeline group adjusting valve (13), and a node of the air switching electromagnetic valve connected with a measuring section inlet pipeline is positioned between a main pipe pressure and temperature measuring point (18) and a measuring section pipeline adjusting valve (11).
4. The heat protection system for the full-temperature full-pressure performance test of the main combustion chamber according to claim 3, wherein an air inlet pipeline outlet of the fuel pipeline is divided into a plurality of branches which are connected with different test piece fuel pipelines, and each branch is sequentially provided with a fuel pipeline cold-blowing hand valve (15), a fuel pipeline cold-blowing one-way valve (16) and a fuel pipeline cold-blowing electromagnetic valve (17).
5. The main combustor full temperature full pressure performance test thermal protection system of claim 4, comprising a cooling water system comprising a low pressure cooling water system; The low-pressure cooling water system comprises a low-pressure cooling water main water inlet pipeline and a low-pressure cooling water main water return pipeline; The inlet of the low-pressure cooling water main inlet pipeline is connected with a low-pressure cooling water source, the outlet is divided into a plurality of branches, the branches are respectively connected with a test piece and a cooling water inlet of an air inlet system of the test piece, a low-pressure cooling water pressure measuring point (19), a low-pressure cooling water electric valve (20) and a low-pressure cooling water filter (21) are sequentially arranged on the pipeline of the low-pressure cooling water main inlet pipeline, and each branch of the outlet of the low-pressure cooling water main inlet pipeline is sequentially provided with a low-pressure cooling water branch water inlet electric valve (22), a low-pressure cooling water inlet temperature measuring point (23) and a low-pressure cooling water inlet flow measuring point (24); The inlet of the low-pressure cooling water main return pipeline is divided into a plurality of branches, the branches are respectively connected with a test piece and a cooling return port of an air inlet system of the test piece, an outlet of the test piece is connected with a low-pressure cooling water source, each branch of the low-pressure cooling water main return pipeline inlet is sequentially provided with a low-pressure cooling water return temperature measuring point (25), a low-pressure cooling water branch return electric valve (26), and the pipeline of the outlet is sequentially provided with a low-pressure cooling water return temperature and pressure measuring point (27) and a low-pressure cooling water return main electric valve (28).
6. The main combustor full temperature full pressure performance test thermal protection system of claim 5, wherein the cooling water system comprises a high pressure cooling water system; The high-pressure cooling water system comprises a high-pressure cooling water total water inlet pipeline and a high-pressure cooling water total water return pipeline; The inlet of the high-pressure cooling water main inlet pipeline is connected with a high-pressure cooling water source, the outlet is divided into a plurality of branches, the branches are respectively connected with a test piece measuring section and a cooling water inlet of an exhaust system of the test piece measuring section, a high-pressure cooling water pressure measuring point (29), a high-pressure cooling water electric valve (30) and a high-pressure cooling water filter (31) are sequentially arranged on the pipeline of the high-pressure cooling water main inlet pipeline, and each branch of the outlet of the high-pressure cooling water main inlet pipeline is sequentially provided with a high-pressure cooling water branch water inlet electric valve (32), a high-pressure cooling water inlet temperature measuring point (33) and a high-pressure cooling water inlet flow measuring point (34); The inlet of the high-pressure cooling water main return pipeline is divided into a plurality of branches, the branches are respectively connected with the test piece measuring section and the cooling return port of the exhaust system of the test piece measuring section, the outlet of the test piece measuring section is connected with a high-pressure cooling water source, each branch of the high-pressure cooling water main return pipeline inlet is sequentially provided with a high-pressure cooling water return temperature measuring point (35), a high-pressure cooling water branch return electric valve (36), and the pipeline of the outlet is sequentially provided with a high-pressure cooling water return temperature and pressure measuring point (37) and a high-pressure cooling water return main electric valve (38).
7. The method for operating the heat protection of the full-temperature full-pressure performance test of the main combustion chamber, which is implemented based on the heat protection system of the full-temperature full-pressure performance test of the main combustion chamber according to claim 6, is characterized by comprising the following steps of: Before the test, selectively opening a cold blowing hand valve (15) of the fuel pipeline according to the fuel pipeline used by the test piece; Before the test piece is started, firstly, cooling water supply of the water-cooled heat exchanger (2) is started, then an air inlet valve (1) is completely started, an outer pipeline group adjusting valve (13) is opened and adjusted, so that the air pressure measured by an outer pipeline group pressure and temperature measuring point (14) is not higher than 0.2MPa gauge pressure, an air switching electromagnetic valve (10) is opened, a measuring section pipeline adjusting valve (11) is opened and adjusted, and the air pressure measured by a measuring section pipeline pressure and temperature measuring point (12) is not higher than 0.2MPa gauge pressure; opening an inert gas shut-off valve (8) and an inert gas electric valve (9); After the test piece is stably ventilated, a fuel oil pipeline cold blowing electromagnetic valve (17) is opened, and an inert gas regulating valve (4) is opened and regulated, so that the fuel oil pipeline cold blowing pressure and the gas pressure measured by a temperature measuring point (6) meet the minimum pressure required by purging the fuel oil pipeline when the test piece is flameout; before the ignition of the test piece, closing a fuel oil pipeline cold blowing electromagnetic valve (17); In the test process, a pipeline regulating valve (11) of the measuring section is regulated to ensure that the pressure of cooling air in the pipeline is higher than the inlet pressure of a test piece; after the test piece is cut off and extinguished, a cold blowing electromagnetic valve (17) of the fuel pipeline is opened to blow off the fuel in the fuel pipeline.
8. The method of operating a main combustor full temperature full pressure performance test thermal protection of claim 7, comprising the method of cooling water system operation: Before the test, the low-pressure cooling water electric valve (20) of the low-pressure cooling water total inlet pipeline is fully opened, the low-pressure cooling water total return water (28) electric valve is opened by 70% -100%, and each branch valve is opened; Immediately before air intake of the air intake system, a high-pressure cooling water electric valve (30) and a high-pressure cooling water return main pipe electric valve (38) are opened.

Description

Main combustion chamber full-temperature full-pressure performance test heat protection system and operation method Technical Field The application belongs to the field of heat protection of full-temperature full-pressure performance tests of a main combustion chamber of a gas turbine, and particularly relates to a heat protection system of the full-temperature full-pressure performance test of the main combustion chamber and an operation method. Background The main combustion chamber is the power source of the gas turbine, and the working performance of the main combustion chamber seriously affects the performance of the whole machine. The complete design process of the main combustion chamber requires multiple test verification from component level to component level, and finally the main combustion chamber can be shaped after the performance test verification of full ring level. The outer quick-witted casket temperature is higher in the main combustion chamber test process, can lead to the fact higher heat load to the outside pipeline of part test piece, need the test bench to possess special cooling pipeline, in order to guarantee the thermal protection demand of all kinds of outside pipelines, various auxiliary pipeline on the test bench also need use cooling gas and cooling water to carry out thermal protection simultaneously, in addition, the measuring section to test demand design need bear combustion chamber export high temperature high pressure environment, the measurement receptor portion of its inside setting and rotating device etc. need utilize high pressure cooling gas and cooling water to satisfy the thermal protection demand in the course of the work, consequently, the test bench needs to possess special thermal protection system and be used for guaranteeing equipment and test piece safe and stable operation. The main combustion chamber test bed is mainly aimed at a component-level main combustion chamber test, a measuring section of the main combustion chamber test bed mainly adopts a water cooling mode, the complexity of the cooling structure of the measuring section and an air pipeline is lower than that of a full-temperature full-pressure test due to lower air flow, the whole equipment has no special requirement on the cooling water regulation and control capability, the cooling air is auxiliary air for the measuring section and a sensing part, the cooling air requirement is lower than 1kg/s, the air is supplied by an independent air source, a double-layer water cooling structure is arranged on an edge pipeline to cool the air to meet the use requirement, and the two positions are coordinated and controlled together in the matching work of the air flow condition inside the test piece in the test process. Aiming at a medium-pressure medium-flow (air pressure is not more than 1MPa, air flow is not more than 30 kg/s) test bed for a component-level main combustion chamber test, as the air pressure in a test piece is relatively low, a cooling water system does not need to consider the problem of balance between the supply pressure of the system and the pressure in a pipeline, and for a cooling gas system, the cooling gas using pressure adjustment requirements of the test piece and peripheral pipelines are relatively low, and meanwhile, the total heat load is relatively low, and gas is led out from an upstream gas source pipeline and can be used after heat exchange and cooling are carried out through a simple double-wall water cooling pipeline. However, neither of these two solutions can be directly applied to the main chamber full Wen Quanya (pressure not lower than 3.5MPa, air flow not lower than 100 kg/s) performance test stand, mainly with the following drawbacks: The double-wall water-cooling pipeline has better comprehensive effect on the air cooling capacity and cost control of smaller flow, but cannot meet the requirement of large-flow cooling air of the full-temperature full-pressure test bed, namely, the full-temperature full-pressure test needs cooling air with higher pressure, the air temperature output by an air source is higher, the thermal load of the full-temperature full-pressure test is larger, the large-flow cooling air supply capacity is needed, and the high-temperature large-flow air cannot be cooled to a lower temperature in time along the water-cooling pipeline; The component level and the component level test use simulation parts, so that part structures are simplified, different from the components on a real gas turbine, the requirements on heat protection are relatively low, and the full-temperature full-pressure test adopts all combustion chamber components which are the same as the real gas turbine, so that the manufacturing cost is high and the heat protection requirements are high; on the assembly and component-level test bed, because the cooling water and cooling air pressure requirements of different components are simpler, the independent adjusting function is