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Effect of a shoulder modification on turbulent supersonic base flow

Roshko, Anatol and Thomke, Gerald J. (1967) Effect of a shoulder modification on turbulent supersonic base flow. AIAA Journal, 5 (4). pp. 827-829. ISSN 0001-1452. http://resolver.caltech.edu/CaltechAUTHORS:20141202-143708545

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Abstract

It has been observed experimentally by Hama and discussed theoretically by Weinbaum that effects of the fast expansion and consequent lip shock at the shoulder of a supersonic base or downstream-facing step can be quite appreciable at high Mach number. Hama found that the lip shock can be much stronger than has been assumed. He also drew attention to characteristic humps or peaks in the pressure distribution on the reattachment surface; these, he showed, could be attributed to secondary waves directed toward the surface from the point of interaction of the lip shock with the main recompression shock. Scherberg and Smith have also drawn attention to the possible strong effects connected with a lip shock. In this note, we report some further observations of the occurrence of this phenomenon, and its elimination by a small modification at the shoulder to alleviate the fast expansion there.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.2514/3.4084DOIArticle
http://arc.aiaa.org/doi/abs/10.2514/3.4084PublisherArticle
Additional Information:© 1967 AIAA. Received November 2, 1966. This study was sponsored by the Douglas Aircraft Company Independent Research and Development Program, Account 81301-026, and was conducted at the Douglas Aerophysics Laboratory, El Segundo, Calif. This note has benefited very much from a free exchange of ideas with Professors L. Lees and T. Kubota, and F. R. Hama.
Group:GALCIT
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Funding AgencyGrant Number
Douglas Aircraft Company Independent Research and Development Program81301-026
Record Number:CaltechAUTHORS:20141202-143708545
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141202-143708545
Official Citation:A. ROSHKO and G. J. THOMKE. "Effect of a shoulder modification on turbulent supersonic base flow." AIAA Journal, Vol. 5, No. 4 (1967), pp. 827-829. doi: 10.2514/3.4084
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52290
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:02 Dec 2014 23:34
Last Modified:13 Feb 2019 18:04

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