Velocity-temperature correlations in high-temperature supersonic turbulent channel flows for two gas models

被引:1
作者
Zhang, Junming [1 ]
Chen, Xiaoping [1 ]
Li, Yi [1 ]
机构
[1] Zhejiang Sci Tech Univ, Natl Prov Joint Engn Lab Fluid Transmiss Syst Tec, Hangzhou 310018, Zhejiang, Peoples R China
来源
MODERN PHYSICS LETTERS B | 2019年 / 33卷 / 21期
基金
中国国家自然科学基金;
关键词
Velocity-temperature correlations; high-temperature; supersonic flow; thermally perfect gas; calorically perfect gas; direct numerical simulation; DIRECT NUMERICAL-SIMULATION; HEAT;
D O I
10.1142/S0217984919502476
中图分类号
O59 [应用物理学];
学科分类号
摘要
Velocity-temperature correlations in a high-temperature supersonic turbulent channel flows, including thermally perfect gas (TPG) and calorically perfect gas (CPG), are investigated based on the direct numerical simulation database [Chen et al., J. Turbul. 19 (2018) 365] to study the gas model effects. The results show that in fully developed turbulent channel flow, the Reynolds analogy factor remains close to 1.2 for both gas models. The "recovery enthalpy" is better than Walz's equation to connect the mean stream-wise velocity with mean static temperature because it is independent with gas models. The modified strong Reynolds analogy for TPG is more accurate scaling than that for CPG, and the turbulent Prandtl number is insensitive to gas models. In addition, the influence of gas model on the probability density functions of stream-wise velocity and static temperature concentrate on the corresponding right tails.
引用
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页数:11
相关论文
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