EFFECTS OF EXTERNAL EXCITAION ON THE LEADING-EDGE SEPARATION FLOWFIELD

Xu Cheng; Zhang Shiying; Zhou Mingde

Chinese

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EFFECTS OF EXTERNAL EXCITAION ON THE LEADING-EDGE SEPARATION FLOWFIELD

更新时间：2026-07-07

- EFFECTS OF EXTERNAL EXCITAION ON THE LEADING-EDGE SEPARATION FLOWFIELD
- Vol. 8, Issue 3, (1993)
- 作者机构：
  
  1. 南京市华东工学院105教研室
  2. 南京航空航天大学,210014
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：1993
- 稿件说明：
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Xu Cheng, Zhang Shiying, Zhou Mingde. EFFECTS OF EXTERNAL EXCITAION ON THE LEADING-EDGE SEPARATION FLOWFIELD[J]. 1993, 8(3).
DOI：

Xu Cheng, Zhang Shiying, Zhou Mingde. EFFECTS OF EXTERNAL EXCITAION ON THE LEADING-EDGE SEPARATION FLOWFIELD[J]. 1993, 8(3). DOI：

摘要

本文对激振与未激振锐缘分离流场细节进行了比较。结果表明

作用于分离点的适当频率的激振对分离流场产生了 6种互相耦合的作用效应

它们是:(1)从整体上减弱或抑制分离流动;(2)改变分离区湍流结构

加剧湍流运动

加快混合和剪切层增长;(3)增强局部区域的回流流动现象;(4)使分离剪切层再附

改变分离流态和分离涡分布;(5)减弱下游流场湍流脉动;(6)增强尾流下弯程度。本文工作为激振控制分离流动技术的工程应用提供了物理基础与指导。

Abstract

This paper presents the comparison of the leading edge separation flow without and with the excitation of select frequency.A variety of excitation effects on the separation flowfield are revealed as(1)delaying separation flow or decreasing separation flow area

(2)modifying turbulence structure

intensifying turbulent activity and enhancing growth rate of separated shear layer

(3)enhancing backflow activity of local region

(4)promoting reattachment and changing separation patterns and vortex distribution

(5)weakening turbulence fluctuation of wake flow

and(6)increasing inclination of wake flow.

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