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The High Speed Flow of Gas Around Blunt Bodies

Published online by Cambridge University Press:  07 June 2016

Hyman Serbin
Hyman Serbin*
Affiliation:
Hughes Aircraft Company, Culver City, California
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Summary

A number of results derived by the author in earlier reports on the flow of air around blunt bodies moving at high speed are here collected in a unified analysis. The theory predicts in a satisfactory way the shock shape and detachment distance for two blunt bodies, a flat disc and a sphere. It is shown that the density ratio across a normal shock is a useful parameter, combining the effects of both the free stream Mach number and the ratio of specific heats.

Type
Research Article
Information
Aeronautical Quarterly , Volume 9 , Issue 4 , November 1958 , pp. 313 - 330
Copyright
Copyright © Royal Aeronautical Society. 1958

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References

Note on page 313 * These earlier reports were prepared during 1956 under the auspices of the RAND Corporation of Santa Monica, California.

Note on page 313 † This is based on a constant rate of heat transfer. Actually, the rate increases as x decreases, again to the disadvantage of the tip.

Note on page 314 * According to the classical kinetic theory of gases, γ=l+2/n, where n is the number of degrees of freedom of the molecule. It appears that γ is closer to unity the larger n is, a condition which is brought about by suitably high temperatures. However, at still higher temperatures, complete dissociation takes place, leading to the value 5/3 for γ.

Note on page 317 * The results will turn out to be consistent with this assumption.

Note on page 325 * This value coincides with a result obtained by W. Hayes in an informal memorandum Sonic Aspects of Hypersonic Flow, Ramo-Wooldridge Corporation, 1955.

Note on page 326 * The abscissa shown in Fig. 4 is ξ modified by replacing K by K-1 (see Section 6).