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Journal of Applied Fluid Mechanics، جلد ۱۶، شماره ۱۲، صفحات ۲۳۹۶-۲۴۱۰
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عنوان انگلیسی Freestream Temperature Effects on the Receptivity of Hypersonic Boundary Layer Induced by Finite-Amplitude Pulse Entropy Waves
چکیده انگلیسی مقاله The unsteady hypersonic flow under finite amplitude pulse entropy perturbation at different freestream temperatures was calculated by direct numerical simulation. The flow response characteristics under the perturbation of entropy waves in freestreaming are analyzed. The temperature effect of freestreaming is studied based on the sensitivity of the boundary layer caused by pulse entropy perturbation. The results show that the higher freestream temperature promotes the first growth of the above third-order modes after leaving the head region, and strongly inhibits the first attenuation. The influence of the freestream temperature on the evolution of the induced disturbance wave is more significant than that on the development of the main flow disturbance waves. Low freestream temperature can suppress the attenuation of the modes below the second order. As the disturbance wave evolves downstream, the frequency band of the finite frequency disturbance wave gradually narrows, and the frequency band narrows faster when the temperature of freestreaming is low than when the temperature of freestreaming is high.
کلیدواژه‌های انگلیسی مقاله Freestream temperature effect, pulse entropy wave, Boundary layer receptivity, Disturbance mode, Hypersonic boundary layer
نویسندگان مقاله X. Tang |
School of Materials Science and Engineering, Yantai Nanshan University, Yantai, 265713, China

D. Chen |
Beijing Spacecrafts, China Academy of Space Technology, Beijing 100094, China

L. Liu |
Beijing Spacecrafts, China Academy of Space Technology, Beijing 100094, China

P. Zhu |
School of Materials Science and Engineering, Yantai Nanshan University, Yantai, 265713, China

L. Xin |
Beijing Spacecrafts, China Academy of Space Technology, Beijing 100094, China

M. Shi |
School of Civil Engineering, Inner Mongolia University of Science and Technology, Baotou, 014010, China

نشانی اینترنتی https://www.jafmonline.net/article_2310_3a3e094ee204a34af7fa29937c99434b.pdf
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