Abstract
Micro shock tubes have been widely used in many engineering and industrial applications, but their performance and detailed flow characteristics are not well known. Compared to macro shock tubes, unsteady flows related to the moving shock waves in micro shock tubes are highly complicated due to more active viscous dissipation and rarefaction effects. This makes shock wave dynamics significantly different from theoretical predictions. One of the major flow behaviors related to the shock wave propagation in micro shock tube is that the boundary layer growth leads to stronger dissipative shock wave. Due to effects of the scale, more shock wave attenuation happens in micro shock tubes. We used a CFD approach to understand the flow characteristics in a micro shock tube with finite diameter. A fully implicit finite volume scheme has been employed to solve the unsteady compressible Navier-Stokes equations. The diaphragm pressure ratio and diameter of the shock tube were varied to investigate their effects on micro shock tube flows. Based on the predicted results, some wave diagrams were built to characterize the micro shock tube flows. Detailed flow structures between the contact surface and moving shock wave were analyzed during the present study.
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Recommended by Associate Editor Hyoung-gwon Choi
Heuy Dong Kim received his B.S. degree and M.S. degrees in Mechanical Engineering from Kyungpook National University, Korea, in 1986 and 1988 respectively. He then received his Ph.D. from Kyushu University, Japan, in 1991. Currently, he is a professor at the Andong National University, Korea. His research interests include high-speed trains, ramjet and scramjet, shock tube and technology, shock wave dynamics, explosions and blast waves, flow measurement, aerodynamic noise, and supersonic wind tunnels.
Guang Zhang received his B.S. degree in Mechanical Engineering from Three Gorges University, China, in 2012. Currently, he is pursuing his Master’s in Andong National University. His research interests include micro shock tube and PIV measurement.
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Zhang, G., Kim, H.D. Numerical simulation of shock wave and contact surface propagation in micro shock tubes. J Mech Sci Technol 29, 1689–1696 (2015). https://doi.org/10.1007/s12206-015-0341-5
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DOI: https://doi.org/10.1007/s12206-015-0341-5