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Journal of Thermal Science

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2022 , Vol. 31 >Issue 1: 35 - 46

DOI: https://doi.org/10.1007/s11630-022-1547-3

气动

Calibration of S-duct Swirl Distortion Based on Vortex Identification Methods

  • SUN Dakun ,
  • LI Zhenyu ,
  • DONG Xu ,
  • SUN Xiaofeng
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  • 1. School of Energy and Power Engineering, Beihang University, Beijing 100191, China
    2. Research Institute of Aero-engine, Beihang University, Beijing 100191, China
    3. Beihang Hangzhou Innovation Institute Yuhang, Hangzhou 310023, China
    4. Shen Yuan Honors College, Beihang University, Beijing 100191, China

网络出版日期: 2023-11-30

基金资助

This research is supported by National Natural Science Foundation of China (Nos. 51906004, 51822601 and 51790514) and National Science and Technology Major Project (2017-II-0005-0018).

版权

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022
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Calibration of S-duct Swirl Distortion Based on Vortex Identification Methods

  • SUN Dakun ,
  • LI Zhenyu ,
  • DONG Xu ,
  • SUN Xiaofeng
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  • 1. School of Energy and Power Engineering, Beihang University, Beijing 100191, China
    2. Research Institute of Aero-engine, Beihang University, Beijing 100191, China
    3. Beihang Hangzhou Innovation Institute Yuhang, Hangzhou 310023, China
    4. Shen Yuan Honors College, Beihang University, Beijing 100191, China

Online published: 2023-11-30

Supported by

This research is supported by National Natural Science Foundation of China (Nos. 51906004, 51822601 and 51790514) and National Science and Technology Major Project (2017-II-0005-0018).

Copyright

Science Press, Institute of Engineering Thermophysics, CAS and Springer-Verlag GmbH Germany, part of Springer Nature 2022
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摘要

S型进气道以其隐身性方面的优势，被广泛地应用于现代先进军用飞行器中。然而其大曲率的流道常常在发动机的气动界面（AIP）造成复杂形式的进气畸变。其中旋流畸变是能够严重影响航空发动机工作性能与稳定性的来流畸变形式之一。通用的适应于评价强旋流畸变进气工况下的压气机稳定性评估方法仍然有待发展。作为评价旋流形式与强度的一种途径，涡识别方法可能具有进行辅助稳定性评估的潜力。本文就一系列不同几何特征的S型进气道模型进行了数值与实验研究，并使用轴向涡量分量与Q准则分析AIP旋流特征与S型进气道几何特征的定量关联。结果表明，几何、轴向涡量分量与Q幅值三者之间关联较为显著。基于现有结论，可以以模化S型进气道影响的方式来辅助快速重构接入进气道后的压气机入口流场的关键特征，从而辅助压气机流动稳定性预测。

关键词： S-inlet; swirl distortion; vortex identification

本文引用格式

SUN Dakun , LI Zhenyu , DONG Xu , SUN Xiaofeng . Calibration of S-duct Swirl Distortion Based on Vortex Identification Methods[J]. 热科学学报, 2022 , 31(1) : 35 -46 . DOI: 10.1007/s11630-022-1547-3

Abstract

The S-shape inlet has been widely used in advanced military aircraft due to their advantage of reducing radar signature. However, the curvature of the inlet usually causes different kinds of intake distortion at the aerodynamic interface plane (AIP). Among them, the swirl distortion has been seriously concerned because of its great impact on the performance and stability of aero-engines. There is still no universal criterion for assessing the stability of compressors in the condition of strong swirl distortion. As an approach of assessing the swirl intensity and pattern, vortex identification method may be used as an auxiliary method for stability analysis. In this paper, numerical and experimental investigations on different S-ducts were carried out. The axial vorticity component and Q criterion were used to analyze the quantitative correlation between geometry and swirl intensity. It was found that there is a relatively strong correlation between the geometry, the axial vorticity component and the Q criterion. The present investigation may provide a quick reconstruction method to model the effect of S-ducts for compressor stability prediction.

Key words： S-inlet; swirl distortion; vortex identification

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