顺排圆台通道流动与传热性能的数值研究  

Numerical study of the flow and heat transfer performance of channels with sequentially arranged frustum of a cone

作　　者：赵振[1] 席雷 高建民[1] 徐亮[1] 李云龙[1] ZAHO Zhen;XI Lei;GAO Jianmin;XU Liang;LI Yunlong(State Key Laboratory for Manufacturing Systems Engineering,Xi′an Jiaotong University,Xi′an 710049,China)

机构地区：[1]西安交通大学机械制造系统工程国家重点实验室,西安710049

出　　处：《压力容器》2023年第6期40-49,71,共11页Pressure Vessel Technology

基　　金：国家自然科学基金项目(51876157);陕西省自然科学基础研究计划青年项目(2022JQ-545);中国博士后科学基金项目(2021M702573)。

摘　　要：为了探究新型顺排圆台结构对板式换热器流动与传热性能的影响,对顺排圆台扰流通道的流动与传热性能进行了详细的数值研究,分析了雷诺数、圆台角度、流向间距比和展向间距比对顺排圆台通道的流动与传热性能的影响规律,并在研究参数范围内采用幂函数拟合得到了圆台通道的流动、传热和综合热力性能关联式。研究结果表明:在不同雷诺数下,当圆台角度从0°增大到30°时,圆台通道的努塞尔数比增大了14.06%~18.45%,摩擦系数比降低了32.89%~34.64%,综合热力性能增大了31.42%~35.29%;当流向间距比和展向间距比均从1.5增大到2.5时,圆台通道的努塞尔数比分别增大了12.09%~15.46%和12.09%~15.46%,摩擦系数比分别降低了13.09%~14.69%和13.09%~14.69%,综合热力性能分别增大了14.83%~19.13%和14.83%~19.13%。拟合得到的流动、传热和综合热力性能关联式的误差分别分布在±12%,±8%和±10%以内,可以准确地预测圆台通道的流动与传热性能。In order to investigate the effect of the new sequentially arranged frustum of a cone structure on the flow and heat transfer performance of the plate heat exchanger,a specific numerical study of the flow and heat transfer performance of the channels was conducted.The influence of Reynolds number,frustum of a cone angle,flow spacing ratio and spanwise spacing ratio on the flow and heat transfer performance of the channels with sequentially arranged frustum of a cone was analyzed.The correlation equations for the flow,heat transfer and comprehensive thermal coefficient performance of the channels were obtained by using power function fitting within the studied parameters.The results show that at different Reynolds number(Re),the Nusselt number(Nu)ratio of the channel increases by 14.06%~18.45%,the friction coefficient(f)ratio decreases by 32.89%~34.64%,and the comprehensive thermal coefficient performance(PF)increases by 31.42%~35.29%when the angle increases from 0°to 30°.When the flow spacing ratio and the spanwise spacing ratio increase from 1.5 to 2.5,respectively,the Nu number ratios of the channels increase by 12.09%~15.46%and 12.09%~15.46%,respectively.The f ratios decrease by 13.09%~14.69%and 13.09%~14.69%,respectively.The comprehensive thermal coefficient performance increase by 14.83%~19.13%and 14.83%~19.13%,respectively.The errors of the fitted correlation equations for flow,heat transfer and comprehensive thermal coefficient performance are distributed within±12%,±8%and±10%,respectively,which can accurately predict the flow and heat transfer performance of the channels with sequentially arranged frustum of a cone.

关 键 词：板式换热器 圆台结构 数值模拟 关联式拟合 

分 类 号：TH49[机械工程—机械制造及自动化] TK47[动力工程及工程热物理—动力机械及工程]