| 带轴对称台阶的圆锥高超声速边界层转捩试验 |
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| 引用本文： | 徐席旺,易仕和,张锋,熊浩西,石洋.带轴对称台阶的圆锥高超声速边界层转捩试验[J].宇航学报,2019,40(8):908-917. |
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| 作者姓名： | 徐席旺 易仕和 张锋 熊浩西 石洋 |
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| 作者单位： | 国防科技大学空天科学学院，长沙 410005 |
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| 基金项目： | 国家重大科研仪器研制项目（11527802）;国家自然科学基金重点项目（11832018） |
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| 摘 要： | 在Ma 6风洞内，通过高频脉动压力测试技术和基于纳米粒子示踪的平面激光散射(NPLS)技术，分别对带前向、后向轴对称台阶的圆锥高超声速边界层转捩进行了试验研究。采用功率谱密度分析和互相关计算等方法对脉动压力数据进行分析，得到了边界层中扰动波的发展规律，定量分析了第二模态波的相关参数。结果显示：两种模型中第二模态波在沿流向向下游发展的过程中，其幅值均先增大再衰减、特征频率均逐渐减小；特征频率和传播速度整体上均随雷诺数的增大而增加(后台阶模型中特征频率由100 kHz增至196 kHz，前台阶中则由 97 kHz 增至174 kHz)、波长变化规律则与之相反(后台阶中由6.35 mm降至4.54 mm，前台阶由7.35 mm降至 4.66 mm )；后台阶模型中第二模态波初次出现位置比前台阶中更靠近上游，边界层转捩位置较前台阶前移。将NPLS结果与高频脉动压力测试结果进行对比，两者吻合较好。
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| 关 键 词： | 圆锥 轴对称台阶 第二模态 高超声速边界层 高频脉动压力 |
| 收稿时间： | 2019-01-17 |
Experiment of Hypersonic Boundary Layer Transition on a Cone with Axisymmetric Step |
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| XU Xi wang,YI Shi he,ZHANG Feng,XIONG Hao xi,SHI Yang.Experiment of Hypersonic Boundary Layer Transition on a Cone with Axisymmetric Step[J].Journal of Astronautics,2019,40(8):908-917. |
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| Authors: | XU Xi wang YI Shi he ZHANG Feng XIONG Hao xi SHI Yang |
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| Affiliation: | College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410005, China |
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| Abstract: | The problem of boundary layer transition on a cone with forward or backward axisymmetric step is investigated in the hypersonic wind tunnel, through the high frequency fluctuation pressure test technique and the nanoparticle-tracer planar laser scattering (NPLS) technique. The fluctuation pressure data is analyzed by the analysis of power spectrum density and cross-correlation calculation. The development of the disturbance waves in the boundary layer is obtained, and the relevant parameters of the second-mode wave are analyzed quantitatively. The results show that, the amplitude of the second-mode wave increases first and then decays downstream along the flow direction. But the characteristic frequency of the second-mode waves are gradually reduced. The characteristic frequency and propagation velocity of the second-mode wave increase with the increase of the Reynolds number (the characteristic frequency in the backward-step model increases from 100 kHz to 196 kHz, and it increases from 97 kHz to 174 kHz in the forward-step model). However, the wavelength is reversed (the wavelength in the backward-step model reduces from 6.35 mm to 4.54 mm , and it reduces from 7.35 mm to 4.66 mm in the forward-step model). The second-mode wave in the backward-step model appears closer to the upstream than in the forward-step model, and the boundary layer transition position is forwarder than the forward-step model. The NPLS results are compared with the fluctuation pressure results, which leads to a good agreement. |
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| Keywords: | Cone Axisymmetric step Second mode Hypersonic boundary layer High frequency fluctuation pressure |
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