高雷诺数低温风洞内传热特性数值研究
高鑫宇，聂旭涛，蔡清青，张伟
（中国空气动力研究与发展中心，四川 绵阳 621000）
摘要：低温风洞的超音速及其高雷诺数工况下的换热特性是分析低温风洞组件温度场分布的关键因素。对超音速及高雷诺数工况换热特性进行数值模拟，通过采用恢复温度修正传热系数的方法，并且与Dittus-Boleter（D-B）公式和Gnielinski公式的计算结果进行对比分析。结果显示，采用恢复温度修正后的D-B公式和Gnielinski公式在超音速及其高雷诺数工况下仍然具有较高准确性。最后将喷管段实际模型工况数值模拟结果与理论预测值进行对比分析，进一步验证了在温度分布不均匀时采用D-B公式和Gnielinski公式求得的平均换热系数在工程计算中的可行性，以及使用恢复温度修正传热系数计算公式的有效性。
关键词：低温风洞；高雷诺数；超音速；换热特性；恢复温度
中图分类号：TB69 文献标志码：A doi：10.3969/j.issn.1006-0316.2021.11.005文章编号：1006－0316 (2021) 11－0034－07
Numerical Study of Heat Transfer Characteristics in Cryogenic Wind Tunnel at High Reynolds Number
GAO Xinyu，NIE Xutao，CAI Qingqing，ZHANG Wei
( China Aerodynamics Research and Development Center, Mianyang 621000, China )
Abstract：The heat transfer characteristics of cryogenic wind tunnel under supersonic and high Reynolds number conditions are the key factors to analyze the distribution of the temperature field in cryogenicwind tunnel. The heat transfer characteristics under supersonic and high Reynolds number conditions are simulated by using the recovery temperature correction heat transfer coefficient calculation method, and the results are compared with the calculations by Dittus-Boelter equation and Gnielinski equation. The results show that the application of D-B formula and Gnielinski equation under supersonic and high Reynolds number conditions after the recovery temperature correction still have a high validity. Finally, the numerical simulation results of the spray pipe section are compared with the predicated values and analyzed, which further verifies the applicability of the average heat transfer coefficient obtained by the above two equations and the validity of the recovery temperature correction heat transfer coefficient calculation formula with non-uniform temperature distribution.
Key words：cryogenic wind tunnel；high Reynolds number；supersonic；heat transfer characteristics；recovery temperature
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收稿日期：2021－01－22
作者简介：高鑫宇（1985－），男，四川仁寿人，硕士，工程师，主要研究方向为风洞设备结构设计等，E-mail：gaokerry@126.com；聂旭涛（1979－），男，安徽宿松人，博士，副研究员，主要研究方向为风洞设备结构设计等。
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