激波风洞7°尖锥边界层转捩实验研究

doi:10.13700/j.bh.1001-5965.2019.0577

北京航空航天大学学报 ›› 2020, Vol. 46 ›› Issue (11): 2087-2093.doi: 10.13700/j.bh.1001-5965.2019.0577

激波风洞7°尖锥边界层转捩实验研究

栗继伟¹, 卢盼^1,2, 汪球^1,2, 赵伟^1,2

1. 中国科学院力学研究所高温气体动力学国家重点实验室, 北京 100190;
2. 中国科学院大学工程科学学院, 北京 100049

收稿日期:2019-11-11 发布日期:2020-12-01
通讯作者: 汪球 E-mail:wangqiu@imech.ac.cn
作者简介:栗继伟,男,硕士,工程师。主要研究方向:高超声速边界层转捩、风洞测试技术;汪球,男,博士,副研究员。主要研究方向:高焓流动气动热。
基金资助:
国家自然科学基金（11402275，11727901）；国家重点研发计划（2016YFA0401201）

Experimental study of boundary-layer transition on a 7° sharp cone in shock tunnel

LI Jiwei¹, LU Pan^1,2, WANG Qiu^1,2, ZHAO Wei^1,2

1. State Key Laboratory of High-temperature Gas Dynamics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100190, China;
2. School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China

Received:2019-11-11 Published:2020-12-01

摘要/Abstract

摘要： 高超声速边界层转捩对摩阻、传热等有重要影响，飞行器的研制迫切希望能精确预测和控制边界层转捩。在JF8A激波风洞中开展了7°半锥角的高超声速尖锥边界层转捩实验研究，利用响应频率达到1 MHz量级的高频压力传感器对尖锥壁面脉动压力进行了测量，并结合热流测量结果，研究了高超声速尖锥边界层中扰动波的发展过程。实验结果表明：JF8A激波风洞在雷诺数为6.4×10⁶/m状态下核心流的自由流噪声为2.8%；高频脉动压力测量技术能清晰地捕捉转捩过程中的第二模态波及其发展历程，试验状态下模型的第二模态波频率范围为165~206 kHz。当前研究结果能够为高超声速数值方法验证提供数据支撑。

关键词: 激波风洞, 高超声速, 边界层转捩, 尖锥, 第二模态波

Abstract: Hypersonic boundary layer transition has an important influence on friction drag and heat transfer, and thus accurate prediction and control of boundary layer transition are critical to the development of hypersonic vehicles. In this paper, experimental study on a 7° half-angle sharp cone was conducted in the JF8A shock tunnel to investigate the hypersonic boundary layer transition. The wall fluctuation pressure was measured by the pressure transducer with the response frequency as high as 1 MHz, and the development process of the disturbance wave in hypersonic sharp cone boundary layer was also investigated together with the results of heat flux measurement. The experimental results show that the pressure fluctuation in the free flow is 2.8% under the test condition of Reynolds number equals to 6.4×10⁶/m. Structures and development of the second mode waves in the process of transition can be obtained by the high-frequency fluctuation pressure measurement technique. The characteristic frequency of the second mode wave changes from 165 kHz to 206 kHz under the present test condition. The current research results can provide data support for hypersonic numerical method validation.

Key words: shock tunnel, hypersonic, boundary layer transition, sharp cone, the second mode wave

中图分类号:

V411.7

栗继伟, 卢盼, 汪球, 赵伟. 激波风洞7°尖锥边界层转捩实验研究[J]. 北京航空航天大学学报, 2020, 46(11): 2087-2093.

LI Jiwei, LU Pan, WANG Qiu, ZHAO Wei. Experimental study of boundary-layer transition on a 7° sharp cone in shock tunnel[J]. Journal of Beijing University of Aeronautics and Astronautics, 2020, 46(11): 2087-2093.

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激波风洞7°尖锥边界层转捩实验研究

Experimental study of boundary-layer transition on a 7° sharp cone in shock tunnel

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