Experimental Investigation of the Hypersonic Boundary-Layer Transition Induced by the Wall-Mounted Cylinder

IF 1.1 4区工程技术 Q4 ENGINEERING, MECHANICAL

Journal of Thermophysics and Heat Transfer Pub Date : 2023-03-17 DOI:10.2514/1.t6682

Haoxi Xiong, Xiwang Xu, S. Yi, Liangtao Nie, Yu Li

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Abstract

The flowfield structure, heat flux distribution, and pressure fluctuations of the wall-mounted cylinder-induced hypersonic boundary-layer transition are investigated at a 10 deg angle of attack. Experiments are conducted in a Mach 6 low-noise wind tunnel using the nanotracer-based planar laser scattering (NPLS) technique, temperature-sensitive paints (TSP), and high-frequency pressure sensors. First, the streamwise and spanwise NPLS images, TSP results, and power spectral density results of isolated cylinders at different heights show that with the increase of the cylinder height [Formula: see text], the size of the separated region and the spanwise width of the horseshoe vortex increase, and the transition moves forward. Second, the flowfield structure and wall heat flux distribution around the streamwise cylinder arrays are investigated. The results demonstrate that the downstream cylinder will destroy the development of the hairpin vortex in the upstream cylinder wake but will expand the horseshoe vortex to both sides, increasing the influence area of the cylinder.

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壁装圆筒诱导高超音速边界层过渡的实验研究

研究了10°攻角下壁装圆柱诱导高超音速边界层过渡的流场结构、热通量分布和压力波动。实验在马赫数为6的低噪声风洞中进行，使用基于纳米示踪剂的平面激光散射（NPLS）技术、温度敏感涂料（TSP）和高频压力传感器。首先，不同高度孤立圆柱体的流向和展向NPLS图像、TSP结果和功率谱密度结果表明，随着圆柱体高度[公式：见正文]的增加，分离区域的大小和马蹄涡的展向宽度增加，过渡向前移动。其次，研究了绕流圆柱阵列的流场结构和壁面热通量分布。结果表明，下游圆柱会破坏上游圆柱尾流中发夹涡的发展，但会使马蹄涡向两侧扩展，增加圆柱的影响面积。

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来源期刊

Journal of Thermophysics and Heat Transfer 工程技术-工程：机械

CiteScore

3.50

自引率

19.00%

发文量

审稿时长

3 months

期刊介绍： This Journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. The Journal publishes qualified papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include aerothermodynamics; conductive, convective, radiative, and multiphase modes of heat transfer; micro- and nano-scale heat transfer; nonintrusive diagnostics; numerical and experimental techniques; plasma excitation and flow interactions; thermal systems; and thermophysical properties. Papers that review recent research developments in any of the prior topics are also solicited.