PIV Measurements of Shock/Cooling-Film Interaction at Varying Shock Impingement Position

PIV Measurements of Shock/Cooling-Film Interaction at Varying Shock Impingement Position
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不同冲击冲击位置处冲击/冷却膜相互作用的 PIV 测量

DOI:
10.1007/978-3-319-64519-3_12
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
W. Schröder
W. Schröder
中科院分区:
--
文献类型:
--
作者:
P. Marquardt;M. Klaas;W. Schröder

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利用高速粒子图像测速仪对具有激波干扰的超音速气膜冷却结构进行了实验研究。在自由流马赫数为时,层流冷却气膜被注入到湍流边界层下方。气流偏转会产生冲击冷却油膜的冲击波。利用时均速度场和雷诺剪应力分布分析了激波冲击位置对冷却油膜的影响。结果表明,激波引起的湍流输运显著增加。靠近喷嘴的冲击同样增加了剪切层和底壁边界层中的雷诺剪应力。撞击位置越远,边界层中的湍流输送越明显,而在剪切层中,湍流输送的增加幅度较小。
A supersonic film-cooling configuration with shock interaction is investigated experimentally by means of high-speed particle-image velocimetry. A laminar cooling film is injected at an injection Mach number ofbeneath a turbulent boundary layer at a freestream Mach number of. A flow deflection ofgenerates a shock wave which impinges upon the cooling film. The influence of the impingement position of the incident shock on the cooling film is analyzed by the time-averaged velocity fields and Reynolds shear stress distributions. The results show a significantly, shock-induced increase of the turbulent transport. Shock impingement close to the injection nozzle equally increases the Reynolds shear stress in the shear layer and in the boundary layer on the bottom wall. An impingement position further downstream drastically increases the turbulent transport in the boundary layer, however, in the shear layer the increase in turbulent transport is lower.
具有冲击/冷却膜相互作用的超音速槽膜冷却的 PIV 测量
DOI: --
发表时间: 2016
期刊:
影响因子: --
作者:
Pascal Marquardt;F. Michaux;M. Klaas
通讯作者: M. Klaas
DOI: 10.1115/1.3684292
发表时间: 1962-02
影响因子: --
作者:
R. A. Seban;L. Back
通讯作者: R. A. Seban;L. Back
DOI: 10.1063/1.4792164
发表时间: 2013-02
期刊: Physics of Fluids
影响因子: 4.6
作者:
S. Pirozzoli;M. Bernardini
通讯作者: S. Pirozzoli;M. Bernardini