Flow instability induced by spiked bodies

Koju Hiraki; Harald Kleine; Hirotaka Maruyama; Tetsuya Hayashida; Kazuya Kitamura; Jun Yonai; Takashi Nakajima; Goji Etoh

doi:10.1117/12.823751

10 February 2009 Flow instability induced by spiked bodies

Koju Hiraki, Harald Kleine, Hirotaka Maruyama, Tetsuya Hayashida, Kazuya Kitamura, Jun Yonai, Takashi Nakajima, Goji Etoh

Author Affiliations +

Proceedings Volume 7126, 28th International Congress on High-Speed Imaging and Photonics; 71260K (2009) https://doi.org/10.1117/12.823751
Event: 28th International Congress on High-Speed Imaging and Photonics, 2008, Canberra, Australia

Abstract

In order to investigate the unsteady flow field around a spiked body in supersonic flow, time-resolved color schlieren visualization was applied using a high-speed video camera which could take up to 1 000 000 frames per second at full frame resolution. Conically and spherically tipped spikes of six different lengths could be attached at the center of the model and their effect on the flow unsteadiness was visually observed. The obtained images revealed in great detail the interaction between the incoming free stream flow and the high-pressure region near the model base, which could make its presence known upstream at the tip of the spike by means of displacing the boundary layer on the spike and subsequently inducing a large-scale instability of the flow.

Citation Download Citation

Koju Hiraki, Harald Kleine, Hirotaka Maruyama, Tetsuya Hayashida, Kazuya Kitamura, Jun Yonai, Takashi Nakajima, and Goji Etoh "Flow instability induced by spiked bodies", Proc. SPIE 7126, 28th International Congress on High-Speed Imaging and Photonics, 71260K (10 February 2009); https://doi.org/10.1117/12.823751

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