Visualization of Wave Rotor Inner Flow Dynamics
Visualization of Wave Rotor Inner Flow Dynamics
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DOI：
10.2322/jjsass.54.345
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发表时间：
2007-03
期刊：
影响因子：
--
通讯作者：
K. Okamoto;T. Nagashima;K. Yamaguchi
中科院分区：
文献类型：
--
作者：
K. Okamoto;T. Nagashima;K. Yamaguchi
波转子的设计需要了解转子通道中的压力波动力学。本文介绍了一个二维数值模拟和实验可视化的波转子压缩过程。首先，一个独特的实验装置与固定的细胞和旋转端口的可视化和直接测量，这种安排是相反的传统设置。接下来，将实验结果和数值结果进行比较，以验证模拟建模，特别是关于通道中压力波的传播速度。最后，逐渐打开通道的端口和通过间隙的泄漏，这被认为是在波转子操作的主导因素，对压力波动力学的影响进行了仔细的研究。结果表明，通道逐渐开度对一次冲击波的影响较大，而泄漏对二次冲击波的影响较大。此外，它揭示了泄漏产生额外的压力波在压缩过程中，由于相邻通道之间的相互作用。
The design of a wave rotor requires an understanding of the pressure wave dynamics in the rotor passages. The present paper describes a two-dimensional numerical simulation and an experimental visualization of the wave rotor compression process. First, a unique experimental apparatus with fixed cells and rotating ports was constructed for visualization and direct measurements; this arrangement is opposite to the conventional setup. Next, experimental and numerical results were compared to verify the simulation modelling, particularly with regard to the propagation velocity of pressure waves in the passages. Lastly, the effects of gradually opening the passage to the ports and leakage through the clearance, which are considered to be dominant factors in wave rotor operation, on the pressure wave dynamics were carefully investigated. The results showed that the gradual passage opening greatly influences the primary shock wave, whereas the leakage mostly influences the secondary (reflected) shock wave. Moreover, it was revealed that the leakage generates an extra pressure wave during the compression process due to the interaction between adjacent passages.