风磨流条件下安装对航空发动机排气性能的影响

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-10-30 DOI:10.1115/1.4063939

Ioannis Goulos, david G. MacManus, Josep Hueso Rebassa, Fernando Tejero, Andy Au, Christopher T. J. Sheaf

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引用次数: 0

摘要

摘要本文对典型大型民用航空发动机排气系统在风磨流条件下，机翼整合度对排气系统气动性能的影响进行了数值研究。这项工作基于双流喷气推进(DSJP)试验台，并将在位于英国飞机研究协会(ARA)的跨音速风洞(TWT)中进行测试。DSJP平台的设计是为了测量由于机翼的影响而安装的压力场对分离射流排气的气动性能的影响。该钻机配备了双分离流量参考喷嘴(DSFRN)，安装在后掠翼下。在跑道末端(EOR)起飞、备降和巡航条件下，对“发动机熄火”风磨工况下风扇和核心喷管压力比的代表性范围进行了计算流体动力学模拟。对隔离配置和安装配置进行了分析，以量化安装压力场对风扇和核心喷嘴流量系数的影响。还评估了风机和核心喷管压力比、自由流马赫数和高升力面对安装的抑制效果的影响。结果表明，在EOR风磨工况下，与隔离配置相比，安装压力场可使风机喷嘴排出系数降低16%。这些结果被用来为计划于2023年进行的实验活动的设计和设置提供信息。

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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Impact of Installation on The Performance of An Aero-Engine Exhaust At Wind-Milling Flow Conditions

Abstract This paper presents a numerical investigation of the effect of wing integration on the aerodynamic behaviour of a typical large civil aero-engine exhaust system at wind-milling flow conditions. The work is based on the Dual Stream Jet Propulsion (DSJP) test rig, as will be tested within the Transonic Wind Tunnel (TWT) located at the Aircraft Research Association (ARA) in the UK. The DSJP rig was designed to measure the impact of the installed pressure field due to the effect of the wing on the aerodynamic performance of separate-jet exhausts. The rig is equipped with the Dual Separate Flow Reference Nozzle (DSFRN), installed under a swept wing. Computational fluid dynamic simulations were carried out for representative ranges of fan and core nozzle pressure ratios for “engine-out” wind-milling scenarios at End of Runway (EOR) take-off, diversion, and cruise conditions. Analyses were done for both isolated and installed configurations to quantify the impact of the installed pressure field on the fan and core nozzle discharge coefficients. The impact of fan and core nozzle pressure ratios, as well as free-stream Mach number and high-lift surfaces on the installed suppression effect were also evaluated. It is shown that the installed pressure field can reduce the fan nozzle discharge coefficient by up to 16%, relative to the isolated configuration for EOR wind-milling conditions. The results were used to inform the design and set-up of the experimental activity which is planned for 2023.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.