Heat transfer characteristics of square wave impinging jets with different duty cycles

WANG Jiansheng; WANG Zhenchuan; LI Meijun

doi:10.3969/j.issn.0438-1157.2013.07.017

您当前的位置：

首页 >

文章列表页 >

Heat transfer characteristics of square wave impinging jets with different duty cycles

更新时间：2025-12-10

- Heat transfer characteristics of square wave impinging jets with different duty cycles
- CIESC Journal Issue 7, Pages: 2428-2435(2013)
- 作者机构：
  
  1. 天津大学机械工程学院, 中低温热能高效利用教育部重点实验室,天津,300072
  2. 中国科学院工程热物理研究所,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2013.07.017
  CLC： 357
- Online First：05 July 2013，
  
  Published：05 July 2013
- 稿件说明：
移动端阅览
WANG Jiansheng, WANG Zhenchuan, LI Meijun. Heat transfer characteristics of square wave impinging jets with different duty cycles[J]. CIESC Journal, 2013, (7): 2428-2435.
DOI：

WANG Jiansheng, WANG Zhenchuan, LI Meijun. Heat transfer characteristics of square wave impinging jets with different duty cycles[J]. CIESC Journal, 2013, (7): 2428-2435. DOI： 10.3969/j.issn.0438-1157.2013.07.017.

摘要

应用数值模拟方法研究了不同工作因数下方波冲击射流的换热及流动特性

并分析了冲击靶面换热特性的变化规律。研究了冲击靶面换热特性随Reynolds数、脉冲频率、喷嘴距冲击靶面距离与喷嘴直径之比等参数的变化规律

重点分析了不同工作因数对冲击射流滞止区域换热与流动特性的影响

并将数值计算结果与连续冲击射流、脉动冲击射流实验结果进行对比验证。计算结果表明:当工作因数为0.5与0.7时

冲击靶面滞止区域Nusselt数非常接近;当工作因数为0.5时

壁面射流区域Nusselt数比工作因数为0.7时提高了10%;工作因数为0.9时

冲击靶面Nusselt数比连续冲击射流提高3%;工作因数为0.7时

相对于工作因数为0.5、0.9及连续冲击射流时

冲击靶面滞止区域存在强烈的涡结构变化。

Abstract

The heat transfer and flow characteristics of square wave impinging jets under different duty cycles are studied by numerical simulation method.This paper presents the heat transfer characteristics of target varied with traditional variables such as Reynolds number

pulse frequency and jet to plate spacing.The heat transfer and flow characteristics in the stagnation area with different duty cycles are analyzed emphatically.The numerical result is verified with the experimental result of impinging jet and pulsating jet.The results show that in the stagnation area

with the duty cycles of 0.5 and 0.7

the Nusselt numbers are very closed to each other.In the wall jet region

the Nusselt number with duty cycle of 0.5 is improved by 10% than that with duty cycle of 0.7.The Nusselt number with duty cycle of 0.9 is improved by 3% than that of steady jet in the whole jet region.Under duty cycle of 0.7

the vortex structure movement is much stronger in the stagnation area

compared to that under duty cycles of 0.5 and 0.9

and steady jet.

关键词

Keywords

references

Views

291

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Numerical study on flow boiling heat transfer in asymmetric serrated microchannel structures

Numerical simulation of power-law fluid flow characteristics in impinging stream reactor

Analysis of the gas-solid fluid dynamic interaction on fine powder discharge

Measurement of flow characteristics of settler in mixer-settler

Study on performance of serrated spiral finned tube banks under wet flue gas condition

Related Author

MA Jiaxuan

TANG Dawei

CUI Shuo

XU Langtao

FENG Ying

ZHANG Jianwei

LI Baoshuai

DONG Xin

Related Institution

School of Energy and Power Engineering, Dalian University of Technology

School of Mechanical and Power Engineering， Shenyang University of Chemical Technology

Shanghai Engineering Research Center of Coal Gasification, East China University of Science and Technology

Sinopec Research Institute of Petroleum Processing

State Key Laboratory of Chemical Engineering, Department of Chemical Engineering, Tsinghua University

⁰