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Flow fields of a large-angle, spiked blunt cone at hypersonic Mach numbers

Gopalan, J and Menezes, V and Reddy, KPJ and Hashimoto, T and Sun, M and Saito, T and Takayama, K (2005) Flow fields of a large-angle, spiked blunt cone at hypersonic Mach numbers. In: Transactions Of The Japan Society For Aeronautical And Space Sciences, 48 (160). pp. 110-116.

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Official URL: http://sciencelinks.jp/j-east/article/200519/00002...

Abstract

The flow fields around a large apex angle. spiked blunt cone have been analyzed at a hypersonic Mach number through experiments in a free piston-driven shock tunnel and the results, are compared with that of a laminar 2-dimensional axisymmetric unsteady Navier-Stokes Solver developed in-house. The model geometry is a 120 apex angle blunt cone equipped with two types of spikes - a disc-tipped spike and it conical-tipped spike, The ratio of total length of the spike to model base diameter was kept at 1.00. The free-stream Mach number and Reynolds number (per unit length) in the free piston shock tunnel were 6.99 and 2.46 x 10(6). respectively. After Measuring the aerodynamic force on this model. time resolved visualization of the flow was attempted using it high-speed video camera in order to understand the characteristic features of the high-speed flow over the spiked body and to check if any unsteadiness existed in the flow fields. The experimental results indicate slight shock oscillations near the edge of the cone model when it is equipped with a disc spike, and the shock oscillations appear lobe more pronounced when the model is equipped with a conical spike. However, the pulsation flow mode is not observed in the experimental results, The numerical results agree with the experimental results on the unsteadiness of the flow fields. The experimental result, obtained in this case also serve as a database for the in-house CFD code validation for such high-speed spiked body flows.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Japan Soc Aeronaut Space Sci.
Keywords: Bodies;Oscillations
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 21 Jul 2009 13:08
Last Modified: 21 Jul 2009 13:08
URI: http://eprints.iisc.ernet.in/id/eprint/17037

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