Investigation on heat transfer mechanism of impinging jet with cross-flow

ZHANG Chuan-jie; SUN Ji-ning; LI Hao; MAO Hong-xia

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Investigation on heat transfer mechanism of impinging jet with cross-flow

更新时间：2026-07-07

- Investigation on heat transfer mechanism of impinging jet with cross-flow
- Vol. 26, Issue 8, (2011)
- 作者机构：
  
  1. 北京航空航天大学能源与动力工程学院航空发动机气动热力国家级重点实验室,北京,100191
  2. 中国航天科工集团公司北京环境特性研究所,北京,100854
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published：2011
- 稿件说明：
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ZHANG Chuan-jie, SUN Ji-ning, LI Hao, et al. Investigation on heat transfer mechanism of impinging jet with cross-flow[J]. 2011, 26(8).
DOI：

ZHANG Chuan-jie, SUN Ji-ning, LI Hao, et al. Investigation on heat transfer mechanism of impinging jet with cross-flow[J]. 2011, 26(8). DOI：

摘要

用实验和数值计算的方法研究了横流对单孔短距冲击换热特性的影响规律.结果表明:①在实验研究范围内

冲击靶面平均努塞尔数Nuav

is随横流的增大而增大;②冲击靶面前区努塞尔数Nufia随横流的增大而减小

这是因为壁面附近x负向流动的气流流速绝对值变小

换热削弱;③靶面冲击点附近及冲击靶面后区努塞尔数Nubia随横流的增大而增大

原因是在冲击点上游出现的马蹄涡的旋涡方向和冲击射流自身形成的卷吸涡拉伸涡对方向相同

这两种涡的叠加使该区域冲击靶面的换热得到增强.

Abstract

Experimental and numerical investigations were made to simulate heat transfer characteristics of a single impinging hole and short impinging distance with cross-flow. The results show that:(1)in the experiment

the average Nusselt number of the impingement surface increases with the increase of cross-flow; (2)the Nusselt number in the front impact area decreases with the increase of cross-flow

because the flow velocity near the wall decreases

weakening the heat transfer effect; (3)the Nusselt number behind impact area near the impact point increases with the increase of cross-flow

because the vortexes directions between the horseshoe vortex in the upstream near the impact point and the stretching vortex produced by impinging jet are the same

and these two vortexes enhance the heat transfer in the impact surface.

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Related Author

TAN Ping

SUN Ji-ning

ZHANG Chuan-jie

LIU Fangyuan

MAO Junkui

SHEN Xinyao

TIAN Yong

JI Lu-cheng

Related Institution

National Key Laboratory of Science and Technology on Aero-Engines, School of Jet Propulsion, Beijing University of Aeronautics and Astronautics

Key Laboratory of Advanced Energy and Power, Institute of Engineering Thermophysics, Chinese Academy of Science

Research Center for Clean Energy and Power, Chinese Academy of Sciences

School of Physical Sciences, University of Chinese Academy of Sciences

School of Aerospace Engineering, Beijing Institute of Technology

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