| 高速流动PIV示踪粒子跟随响应特性实验研究 |
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| 引用本文： | 王彦植,陈方,刘洪,沙莎,逯雪铃,张庆兵,岳连捷.高速流动PIV示踪粒子跟随响应特性实验研究[J].实验流体力学,2018,32(3):94-99. |
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| 作者姓名： | 王彦植 陈方 刘洪 沙莎 逯雪铃 张庆兵 岳连捷 |
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| 作者单位： | 1.上海交通大学 航空航天学院, 上海 200240 |
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| 摘 要： | 示踪粒子的跟随响应能力是影响高速流动PIV测量精度的重要因素。针对法向马赫数大于1.4的高速流动所提出粒子松弛特性分析模型，结合理论分析与数值模拟方法，发展了高速流动下的示踪粒子布撒技术，提高了PIV技术定量化测量能力。基于上海交通大学多马赫数风洞，以不同粒径的氧化钛颗粒作为示踪粒子，利用PIV技术观测Ma4的高速流动诱导的一道22°激波，结果显示30nm粒径的示踪粒子有更优秀的跟随响应能力；并以该粒子进行了不同条件下（包括斜激波与脱体激波）的跟随性实验验证，为高速流动PIV示踪粒子选择提供了实验支撑。
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| 关 键 词： | 超声速风洞 PIV实验 示踪粒子 随流能力 理论验证 |
| 收稿时间： | 2017-12-13 |
Experimental investigation on response characteristics of PIV tracer particles in high speed flow |
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| Affiliation: | 1.School of Aeronautics and Astronautics, Shanghai Jiao Tong University, Shanghai 200240, China2.Beijing Institute of Electronic System Engineering, Beijing 100854, China3.Institute of Mechanics, Chinese Academy of Sciences, Beijing 100089, China |
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| Abstract: | The tracer's tracking ability is the key factor affecting the measurement accuracy of high speed PIV. Particle relaxation modeling is presented for high speed flow with the normal mach number over 1.4. Based on the combination of theoretical analysis and numerical simulations, high speed PIV and the tracer particle seeding technology are developed, and the quantificational measurement ability of PIV is improved. Recent experimental results were obtained by the Multi-Mach number high-speed wind tunnel in Shanghai JiaoTong university where titanium dioxides of various sizes were used as tracers in the Mach 4 wind tunnel to induce a 22° shock wave. The results reveal that the 30nm titanium dioxide particle is the most qualified option. Meanwhile, various shock wave experiments (including oblique shock wave and detached shock wave) were carried out to validate the particle tracing ability. In this paper, multiple experimental results are put forward to support the selection of tracer particles of high speed PIV. |
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