Effect of self-recirculating casing treatment on the unsteady flow and stability of counter-rotating axial-flow compressor

IF 0.7 4区工程技术 Q4 ENGINEERING, AEROSPACE

International Journal of Turbo & Jet-Engines Pub Date : 2022-08-23 DOI:10.1515/tjj-2022-0016

Yanchao Guo, Limin Gao, X. Mao

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引用次数: 3

Abstract

Abstract Counter-rotating axial-flow compressor (CRAC) is a promising technology to enhance the thrust-to-weight ratio of aero-engines. Self-recirculating casing treatment (SRCT) is an efficient flow control technique for increasing stall margin in conventional compressors. With the purpose of investigating the applicability and mechanism of SRCT in the CRACs, a two-stage CRAC is selected to investigate the stability enhancement mechanism of SRCT and its effect on the unsteady flow near the rotor tip, and the effect of injector location on the stability improvement capacity of SRCT is also studied. Results show that about 7.73% stall margin improvement can be achieved by configuring the SRCT on the near rotor top, and the injector location also has a significant influence on the stability expansion potential of SRCT. The SRCT delays the stall occurrence by weakening the intensity of tip leakage flow (TLF) and restraining the leading-edge spillages of TLF. The SRCT reduces the unsteady interference between the adjacent rotors by receding the disturbance of the upstream wake and inhibiting the potential flow effect of the downstream. Furthermore, the SRCT reduces the self-excited oscillation frequency of TLF and damps its fluctuation amplitude.

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自循环机壳处理对对对旋轴流压缩机非定常流动及稳定性的影响

反向旋转轴流压气机(CRAC)是一种很有前途的提高航空发动机推重比的技术。自循环机匣处理(SRCT)是一种提高常规压缩机失速余量的有效流动控制技术。为了研究SRCT在CRAC中的适用性和机理，选择了两级crc，研究了SRCT的增稳机理及其对转子尖端附近非定常流场的影响，并研究了喷油器位置对SRCT增稳能力的影响。结果表明，在近旋翼顶部配置SRCT可提高约7.73%的失速裕度，喷油器位置对SRCT的稳定膨胀势也有显著影响。SRCT通过减弱叶尖泄漏流强度和抑制叶尖泄漏流的前缘溢出来延缓失速的发生。SRCT通过减弱上游尾迹的扰动和抑制下游的势流效应来减小相邻转子间的非定常干扰。此外，SRCT降低了TLF的自激振荡频率，抑制了其波动幅度。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Turbo & Jet-Engines 工程技术-工程：宇航

CiteScore

1.90

自引率

11.10%

发文量

审稿时长

6 months

期刊介绍： The Main aim and scope of this Journal is to help improve each separate components R&D and superimpose separated results to get integrated systems by striving to reach the overall advanced design and benefits by integrating: (a) Physics, Aero, and Stealth Thermodynamics in simulations by flying unmanned or manned prototypes supported by integrated Computer Simulations based on: (b) Component R&D of: (i) Turbo and Jet-Engines, (ii) Airframe, (iii) Helmet-Aiming-Systems and Ammunition based on: (c) Anticipated New Programs Missions based on (d) IMPROVED RELIABILITY, DURABILITY, ECONOMICS, TACTICS, STRATEGIES and EDUCATION in both the civil and military domains of Turbo and Jet Engines. The　International Journal of Turbo & Jet Engines　is devoted to cutting edge research in theory and design of propagation of jet aircraft. It serves as an international publication organ for new ideas, insights and results from industry and academic research on thermodynamics, combustion, behavior of related materials at high temperatures, turbine and engine design, thrust vectoring and flight control as well as energy and environmental issues.