Effect of Conical Free Stream on Shock Stand-Off Distance
Abstract
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.
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.Additional details
Identifiers
- Eprint ID
- 97669
- Resolver ID
- CaltechAUTHORS:20190806-082809988
Funding
- Air Force Office of Scientific Research (AFOSR)
- FA9550-15-1-0288
Dates
- Created
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2019-08-06Created from EPrint's datestamp field
- Updated
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2021-11-16Created from EPrint's last_modified field
Caltech Custom Metadata
- Caltech groups
- GALCIT