Experimental study on forced convection heat transfer from a flat plate by a transverse jet

ZHONG Huadong; LI Guoneng; ZHENG Youqu; YANG Huawen

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Experimental study on forced convection heat transfer from a flat plate by a transverse jet

更新时间：2025-09-28

- Experimental study on forced convection heat transfer from a flat plate by a transverse jet
- Thermal Power Generation Vol. 45, Issue 6, Pages: 11-18(2016)
- 作者机构：
  
  浙江科技学院能源与环境系统工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK124
- Published：2016
- 稿件说明：
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ZHONG Huadong, LI Guoneng, ZHENG Youqu, et al. Experimental study on forced convection heat transfer from a flat plate by a transverse jet[J]. Thermal power generation, 2016, 45(6): 11-18.
DOI：

ZHONG Huadong, LI Guoneng, ZHENG Youqu, et al. Experimental study on forced convection heat transfer from a flat plate by a transverse jet[J]. Thermal power generation, 2016, 45(6): 11-18. DOI：

摘要

为研究横向射流对平板传热特性的影响

搭建了横向射流强化传热的实验台

研究了不同射流比r(0≤r≤6.69)下横向射流对加热平板对流换热效率的影响

通过加热平板表面温度的分布云图

分析了对流换热系数h的变化规律

讨论了横向射流强化传热的物理机理。结果表明:当r较小时

增加横向射流有利于强化对流换热(r=0.57时

强化传热因子Φ=8.85%);随着r的继续增大

强化传热效果不断下降(r=1.12时Φ=5.14%

r=2.23时Φ=2.34%);继续增大r值

将恶化对流换热(r=4.46时

Φ=-1.97%);随r的增大

最高温度点先后移再前移。

Abstract

In order to study the influence of a transverse jet on heat transfer performance of a flat plate

an experimental setup was built up.Different jet-to-cross flow ratios(0≤r≤6.69)were explored.The temperature distributions on the heated flat plate were measured to analyze the change trend of the convective heat transfer coefficient

aiming to reveal the physical mechanism of heat transfer enhancement by a transverse jet.The results show that

the heat transfer from the flat plate was enhanced by the transverse jet when the jet-to-cross flow ratio was relatively small(the enhancing heat transfer ratioΦreached 8.85%when r was 0.57).Increasing the jet-to-cross flow ratio resulted in lower enhancing heat transfer ratio(Φreached 5.14% when r was 1.12

andΦ was 2.34% when r was 2.23).Further increasing the jet-to-cross flow ratio will downgrade the heat transfer effect(Φ was-1.97% when r was 4.46).On the other hand

the location of the highest temperature point shifted to the downstream side

then shifted back to upstream side as the jet-to-cross flow ratio increased.

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