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Pre-rotation system for engine

A pre-swirl system and engine technology, applied in the direction of engine components, engine functions, machines/engines, etc., can solve the problems of poor cooling effect of airflow channels and difficult manufacturing, so as to avoid flow separation, reduce incoming flow angle of attack, Effect of reducing flow loss

Active Publication Date: 2019-08-20
AECC COMML AIRCRAFT ENGINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to provide an engine pre-rotation system in order to overcome the disadvantages of poor cooling effect of the airflow channel of the pre-rotation system in the prior art and great manufacturing difficulty.

Method used

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  • Pre-rotation system for engine
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  • Pre-rotation system for engine

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Embodiment 1

[0041] Figure 5 It is a schematic diagram of the first embodiment of the engine pre-swirl system of the present invention after being divided along the circumferential surface of revolution. Figure 6 It is an axonometric view of the rotary plane in Embodiment 1 of the engine pre-swirl system of the present invention. Figure 7 It is a forward projection view of the outlet axial section of the rectifying vane in Embodiment 1 of the engine pre-swirl system of the present invention. Figure 8 It is a rear projection view of the axial section at the inlet of the downstream channel in Embodiment 1 of the engine pre-swirl system of the present invention.

[0042] Such as Figure 5 to Figure 8As shown, the present invention discloses a kind of engine pre-swirl system, the upstream of the pre-swirl nozzle 10 is provided with a plurality of rectifying blades 20, according to the needs of the original through-flow pillar to circulate cold air, the rectifying blades 20 are provided w...

Embodiment 2

[0048] Figure 9 It is an axonometric view of the rotary plane in Embodiment 2 of the engine pre-swirl system of the present invention. Such as Figure 9 As shown, the structure of this embodiment is basically the same as that of Embodiment 1, and the difference is that a plurality of vane-shaped nozzle cascades 30 are arranged downstream of the rectifying vane 20 for rectifying the incoming flow, and the rectifying vane 20 and the nozzle The deflection directions of the cascades 30 are the same, and the airflow deflection angle ranges from 0° to 80°. A rectifying vane channel 40 is formed between two adjacent rectifying vanes 20 , and a nozzle channel 50 is formed between two adjacent nozzle cascades 30 . Preferably, the deflection angle of the air flow from the inlet of the rectifying blade 20 to the outlet of the nozzle cascade 30 is in the range of 70°-80°. The direction of the air outlet angle of the rectifying blade 20 deviates from the inlet angle of the blade of the...

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Abstract

The invention provides a pre-rotation system for an engine. A plurality of flow adjusting blades are arranged on the upstream portion of a pre-rotation nozzle of the pre-rotation system. Air holes areformed in the flow adjusting blades. A flow channel is formed by the flow adjusting blades and the inner and outer ring surfaces of the pre-rotation nozzle and is used for accelerating and deflectingan incoming flow. According to the pre-rotation system for the engine, the cylindrical air holes in the front portion of the pre-rotation system are designed in the flow adjusting blades, and the airflow is deflected by the flow adjusting blades before entering the pre-rotation nozzle, so that the flow loss caused after the air flow passes through original cylindrical air holes is reduced, and the problem of an excessively large air flow turning angle at an inlet of an existing straight-cylindrical-hole pre-rotation nozzle is effectively solved. After the air flow is adjusted by the flow adjusting blades, the attack angle of the incoming flow at an inlet of the round hole type nozzle is reduced, and flow separation of the air flow beside an incoming flow from the back can be avoided.

Description

technical field [0001] The invention relates to the field of aero-engines, in particular to an engine pre-swirl system. Background technique [0002] With the continuous improvement of aero-engine performance, the gas temperature before the turbine gradually increases. The temperature before the turbine of the early turbojet engine is only 1000K-1200K. At present, the temperature in front of the turbine has reached 2100K, which poses a serious challenge to the material, process and cooling technology of the turbine components. Most of the existing materials cannot withstand such a high temperature for a long time, so the high-pressure turbine blades in a high-temperature and high-pressure environment need to be cooled by cooling air. However, the existing turbine blade cooling technology has obvious limitations, and its potential exploitation is close to the limit, which prompts people to turn more and more to tap the cooling potential by improving the characteristics of t...

Claims

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Application Information

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IPC IPC(8): F01D9/04
CPCF01D9/041F05D2260/14
Inventor 潘贤德范宜龙李蓓罗华玲吕剑波
Owner AECC COMML AIRCRAFT ENGINE CO LTD
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