Holographic Interferometric Observation Of Shock Tube Flows

K. Takayama; M. Izumi; K Itoh; H. Sugiyama

doi:10.1117/12.948685

1 February 1989 Holographic Interferometric Observation Of Shock Tube Flows

K. Takayama, M. Izumi, K Itoh, H. Sugiyama

Proceedings Volume 0981, High Speed Photography, Videography, and Photonics VI; (1989) https://doi.org/10.1117/12.948685
Event: 32nd Annual International Technical Symposium on Optical and Optoelectronic Applied Science and Engineering, 1988, San Diego, CA, United States

Abstract

It is shown that holographic interferometry has an enormous versatility for gasdynamics applicationsl, 2 especially for the shock tube research. The present paper reports recent results of the holographic interferometric shock tube experiment which was conducted in the Institute of High Speed Mechanics, Tohoku University. The experiment was conducted in 60 mm X 150 mm and 30 mm X 40 mm shock tubes equipped with a pulsed laser holographic interferometry. Two topics were presented here, (1) existence of the dust free region and vortex generation over a circular cylinder in a dusty gas shock tube for shock Mach number of 1.3 and 2.2 in air, and (2) interaction of shock waves with vortices which were generated over a 20 mm circular cylinder and at the leading edge of a splitter plate. These models were placed in the 60 mm X 150 mm shock tube for shock Mach number of 1.5 and 2.5. In the dusty gas shock tube flow, the generation of the the dust free region over the cylinder was clarified. The experimental results of shock propagation over cylinders were also compared with the numerical simulation using the TVD finite difference scheme3 applied to the Navier-Stokes equations. Very good agreement was obtained between the interferogram and the numerical simulation. Unsteady shock boundary-layer interaction processes and the formation of the vortices were clearly observable. Consequently, it is emphasized that only hologarphic interferograms can give a direct validations for the recently developing numerical schemes by comparing them with the experimental isopycnics.

Citation Download Citation

K. Takayama, M. Izumi, K Itoh, and H. Sugiyama "Holographic Interferometric Observation Of Shock Tube Flows", Proc. SPIE 0981, High Speed Photography, Videography, and Photonics VI, (1 February 1989); https://doi.org/10.1117/12.948685

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