流体力学与飞行力学

进气畸变下航空发动机失速/喘振适航审定方法

  • 李志平 ,
  • 王孟琦
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  • 北京航空航天大学 能源与动力工程学院, 北京 100191

收稿日期: 2014-09-22

  修回日期: 2014-12-01

  网络出版日期: 2014-12-30

Airworthiness certification method for aeroengine on stall and surge with inlet distortion

  • LI Zhiping ,
  • WANG Mengqi
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  • School of Energy and Power Engineering, Beihang University, Beijing 100191, China

Received date: 2014-09-22

  Revised date: 2014-12-01

  Online published: 2014-12-30

摘要

航空发动机失速/喘振问题是适航审定的重要内容之一,针对失速/喘振适航审定方法开展研究具有重要的工程价值。根据中国民用航空规章(CCAR)《航空发动机适航规定》中关于航空发动机失速/喘振的基本要求,从进气畸变对发动机失速/喘振裕度的影响角度出发,以平行压气机模型为基础对某型航空发动机通用特性及失速裕度进行预估,计算结果与实验值仅相差不到1.5%;然后采用三维数值方法计算了进气迎角以及畸变范围变化下多种工况的进口畸变流场,对比分析后总结出航空发动机喘振裕度-进气畸变-飞行状态(迎角)三者之间的变化规律,发展了极限飞行姿态的判定方法;最后,结合中国民用航空规章的相关文件,制订了针对航空发动机失速/喘振的适航审定流程。

本文引用格式

李志平 , 王孟琦 . 进气畸变下航空发动机失速/喘振适航审定方法[J]. 航空学报, 2015 , 36(9) : 2947 -2957 . DOI: 10.7527/S1000-6893.2014.0329

Abstract

Aeroengine on stall and surge is an important part of airworthiness certification, and the development of airworthiness certification methods for civil engine on stall and surge is of great engineering value.Based on the basic requirement of the stall and surge of the aeroengine in the "Aero Engines Airworthiness Regulation", in view of the effect of inlet distortion on stall and surge and using the parallel compressor model, the common characteristics and the surge margin of an aeroengine are estimated and there is only a difference of less than 1.5% between the calculating results and experimental data. Then a three-dimensional numerical method is used to calculate the distortion of the flow field including a variety of conditions of changes in intake angle of attack and distortion range, and the change rule is summed up between the surge margin, inlet distortion and angle of attack, and the judgment method of limit attack of angle is developed. Finally, we develop a method of airworthiness certification for aeroengine on stall and surge by combining the relevant documents in China Civil Aviation Regulations.

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