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Effect of Conical Free Stream on Shock Stand-Off Distance

Hornung, H. G. (2019) Effect of Conical Free Stream on Shock Stand-Off Distance. AIAA Journal, 57 (9). pp. 4115-4116. ISSN 0001-1452.

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In many experimental studies of hypersonic flow in blow-down wind tunnels or shock tunnels, the flow is accelerated from rest through a conical nozzle. While a contoured nozzle is designed for a particular ratio of specific heats or a particular gas, a conical nozzle is more versatile as it can be used for any gas. Examples of such investigations are [1–3]. These were performed in the T5 piston-driven reflected shock tunnel at Caltech. It is important to understand the effect of the conicity of the free stream produced by a conical nozzle. The present work investigates how it affects the shock wave stand-off distance in axisymmetric flow over a convex blunt body. Previous work on the effect of free-stream conicity notably includes a study of its effect on pressure distribution and drag in flow over blunted slender bodies by [4], in which theoretical results based on the Newtonian approximation were compared with experiments.

Item Type:Article
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Hornung, H. G.0000-0002-4903-8419
Additional Information:© 2019 American Institute of Aeronautics and Astronautics, Inc. Received 15 February 2019; revision received 10 May 2019; accepted for publication 13 May 2019; published online 30 May 2019. This work was funded by the Air Force Office of Scientific Research under Contract No. FA9550-15-1-0288, PI J. M. Austin, contract officer I. A. Leyva.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-15-1-0288
Issue or Number:9
Record Number:CaltechAUTHORS:20190806-082809988
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Official Citation:Effect of Conical Free Stream on Shock Stand-Off Distance. H. G. Hornung. AIAA Journal 2019 57:9, 4115-4116.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:97669
Deposited By: Tony Diaz
Deposited On:06 Aug 2019 18:19
Last Modified:03 Oct 2019 21:33

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