CN-121994493-A - Mixing device for simulating high-flow high-low temperature gas in air environment

Abstract

The invention provides a mixing device for simulating high-flow high-low temperature gas in an air environment, which comprises a T-shaped pipeline, an airflow layering partition plate and a high-low temperature partition plate, wherein the T-shaped pipeline comprises a first inlet, a second inlet and a converging outlet, the inner space of the T-shaped pipeline is divided into at least two layers of mutually independent gas flow paths along the vertical direction, the high-low temperature partition plate is arranged in the gas flow paths and used for blocking the gas passing through the first inlet or the second inlet in the gas flow paths, and the first inlet and the second inlet in the gas flow paths of two adjacent layers are alternately communicated with the converging outlet through the high-low temperature partition plate. According to the invention, the mixing mechanism of natural flow development of the air supply incoming flow in the long-distance air supply pipeline in the traditional scheme is changed in principle, the heat exchange process is enhanced in space, the mixing efficiency is effectively improved, and the problem of insufficient front-end straight pipe sections caused by space limitation is effectively solved.

Inventors

• Hou Xinzheng
• JI XIAOYU
• DENG YUNZHONG
• YIN JUNYI
• JIA WEI
• LI JIANG
• TIAN JINHU
• ZHANG YA
• LIU DONGGEN
• WANG FEIFEI
• DENG KAI
• MIN HAO
• ZHOU ZHITAO
• CHEN XUESHANG

Assignees

• 中国航发四川燃气涡轮研究院

Dates

Publication Date

20260508

Application Date

20260128

Claims (9)

1. 1. An air environment simulation high-flow high-low temperature gas blending device, which is characterized by comprising: A T-pipe (1) comprising a first inlet, a second inlet and a junction outlet; the air flow layering partition plate (2) divides the inner space of the T-shaped pipeline (1) into at least two layers of mutually independent air flow paths along the vertical direction; And a high-low temperature separator (4) provided in the gas flow path and configured to block the passage of gas at the first inlet or the second inlet in the gas flow path, wherein the first inlet and the second inlet in the gas flow path of two adjacent layers are alternately communicated with the merging outlet by the high-low temperature separator (4).
2. 2. The blending device for simulating high-flow high-low temperature gas in the air environment according to claim 1, wherein the air flow layering partition plate (2) comprises a horizontal partition plate and a vertical partition plate, the horizontal partition plate divides the inner space of the T-shaped pipeline (1) into at least two layers of mutually independent gas flow paths in the vertical direction, and the vertical partition plate divides each layer of gas flow path into a plurality of mutually independent cavities.
3. 3. The air environment simulation high-flow high-low temperature gas mixing device according to claim 2, wherein the internal space of the T-shaped pipeline (1) is divided into a first gas flow path, a second gas flow path and a third gas flow path by a horizontal partition plate, the high-low temperature partition plate (4) is arranged on one side close to the second inlet and used for blocking air inlet at the second inlet, the high-low temperature partition plate (4) is arranged on one side close to the first inlet and used for blocking air inlet at the first inlet in the second gas flow path, and the high-low temperature partition plate (4) is arranged on one side close to the second inlet and used for blocking air inlet at the second inlet in the third gas flow path.
4. 4. The device for mixing high-flow high-low temperature gas simulated in the air environment according to claim 2, wherein the device for mixing high-flow high-low temperature gas simulated in the air environment further comprises a half-moon-shaped inclined baffle plate (3) which is arranged between the outermost vertical partition plate and the inner wall of the T-shaped pipeline (1).
5. 5. The device for mixing high-flow high-low-temperature gas simulated in the air environment according to claim 4, wherein the half-moon-shaped inclined baffle (3) is obliquely arranged between the axes of the corresponding first inlet or second inlet, and the half-moon-shaped inclined baffle (3) forms a gas guiding inclined plane facing the direction of the gas flow layering partition plate (2).
6. 6. The device for simulating high-flow high-low temperature gas mixing in the air environment according to claim 1, wherein the wave plate assembly (5) is arranged at the converging outlet and positioned outside the outlet of the gas flow path.
7. 7. The air environment simulation high-flow high-low-temperature gas mixing device according to claim 6, wherein the wave plate assembly (5) comprises The support plate is fixedly connected with the converging outlet, and the position of the support plate corresponds to the position of the outlet of the gas flow path; the wave plate body is arranged on the supporting plate.
8. 8. The device for simulating the mixing of high-flow high-temperature and low-temperature air environment according to claim 7, wherein the supporting plates are multi-layered, a plurality of wave plate bodies are arranged on each supporting plate, and the wave plate bodies are arranged at intervals.
9. 9. The device for simulating the mixing of high-flow high-low-temperature gas in the air environment according to claim 6, wherein the wave plate assemblies (5) are arranged in a plurality of groups in sequence along the air outlet direction.

Description

Mixing device for simulating high-flow high-low temperature gas in air environment Technical Field The invention relates to the technical field of aeroengines, in particular to a mixing device for simulating high-flow high-low temperature gas in an air environment. Background The aero-engine air simulation test can simulate parameters such as air inlet temperature, pressure, speed and the like of the engine when the aircraft flies, and can simulate the working state of the aero-engine in the whole flight envelope on the ground. During the test, accurate and rapid warming and cooling of the engine intake is required. In order to realize rapid switching of the engine air inlet temperature conditions under different flight conditions, the high-temperature air flow and the low-temperature air flow are often required to be regulated, and finally mixed by a mixer. The uneven incoming flow field can cause stall or surge of an aeroengine, so that the air simulation test has strict requirements on uniformity of inlet temperature of the engine, air supply is required to be precisely heated and cooled, the flow rate of high-temperature and low-temperature air flow is regulated through an air supply regulating valve, the non-uniformity (less than or equal to 1%) of the inlet temperature of the engine is finally ensured by mixing the high-temperature and low-temperature air flow through a mixer, meanwhile, the pressure non-uniformity (less than or equal to 1%) and the turbulence level (less than or equal to +/-1%) are also required to be ensured, the influence of the air supply environment of a test bed on the performance parameters of the engine in the process of testing the engine can be ensured to be minimized, and accurate test data can be obtained. Meanwhile, the mixer for the air simulation test has higher requirements on pressure loss and scale. For civil aero-engine air simulation tests with flow demands on the order of hundreds or even thousands of kilograms per second, excessive pressure loss means high costs of air supply fans and operation, and even makes it difficult for the test bed to provide the operating points required for engine test runs. In the design and construction scheme of the existing in-house or in-use air environment simulation test equipment at home and abroad, the main structure of the mixing device is a layered partition plate, and two or more air flows with different temperatures enter the mixing device and are mixed by diversion. The traditional scheme has the defects that 1, the mixing device mainly depends on turbulent diffusion, high-temperature and low-temperature gases are required to flow for a long distance to realize uniform temperature mixing, so that pipelines are too long, 2, the traditional mixing device is generally smaller in flow, large-flow and high-temperature and low-temperature gas mixing is extremely easy to separate cold and hot gases, the temperature non-uniformity of an outlet section is larger, the temperature non-uniformity of an inlet of an engine cannot be met (less than or equal to 1 percent), the reality of an air simulation test is affected, 3, the pressure loss caused by air flow resistance of the traditional mixing device is larger, for large-flow mixing, the operation cost is increased due to excessively high pressure loss, and even the condition that the air source capacity cannot meet the requirement of required working conditions is generated. The existing or building equipment is limited by a building space, the gas supply pipe network is compact in arrangement, the length of a straight pipe section at the front end of the blending device is short, so that the gas flow entering the blending device is separated or vortexed, the gas inlet flow field is extremely uneven, the blending effect of the blending device is poor, the gas flow field after blending can not meet the requirement of an air environment simulation test, and the performance of the air environment simulation test of an engine is affected. Therefore, it is necessary to design a device capable of realizing high-efficiency and uniform mixing of high-temperature gas and low-temperature gas under the conditions of short distance and low flow resistance so as to meet the strict requirements of air simulation test under compact space arrangement. Disclosure of Invention In view of the above, the invention provides a mixing device for simulating high-flow high-low temperature gas in an air environment, which aims to solve the problems of poor temperature uniformity, overlarge pressure loss, poor mixing effect and the like in the mixing of high-flow high-low temperature gas in the construction state of the existing test equipment. The invention provides a high-flow high-low temperature gas mixing device for simulating an air environment, which comprises a T-shaped pipeline, an airflow layering partition plate and a high-low temperature partition plate, wherein the T-shaped pipeline comprises a f