Blunt cones in rarefied hypersonic flow: Experiments and Monte-Carlo simulations

Dahlen, G. A., Macrossan, M. N., Brundin, C. L. and Harvey, J. K. (1984). Blunt cones in rarefied hypersonic flow: Experiments and Monte-Carlo simulations. In: 14th International Symposium on Rarefied Gas Dynamics, Tskuba, Japan, (229-240). August, 1984.

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Author Dahlen, G. A.
Macrossan, M. N.
Brundin, C. L.
Harvey, J. K.
Title of paper Blunt cones in rarefied hypersonic flow: Experiments and Monte-Carlo simulations
Conference Paper Type Fully Published Paper
Conference name 14th International Symposium on Rarefied Gas Dynamics
Conference location Tskuba, Japan
Conference dates August, 1984
Publication date 1984-12
Volume number I
Start page 229
End page 240
Abstract/Summary The drag coefficients for cones with hot and cold walls and different bluntness ratios have been found experimentally. There is a small wall temperature effect which can be accounted for by the change in the pressure drag that occurs in the free molecular limiting flow. The results from the Monte-Carlo calculations agree well with the experiments and they show that the flow field is characterised by the free molecular behaviour at least as far as Knudsen = 0.02 (based on bade diameter) and that the shear drag is the predominant force. From the experimental results it seems reasonable to conclude that the flow fields are characterised by the free molecular behaviour down to the lowest value of Knudsen number tested, which was 0.006. The nose bluntness effect on the measured drag can be correlated by normalising the coefficient by the value in the free molecular limit and by defining a Knudsen number based on the cone length
Subjects 240502 Fluid Physics
290201 Aerodynamics
Keyword DSMC
rarefied flow
blunt cone
DSMC
variable rotation relaxation
Morse potential
magnetic suspension
References Haslam-Jones, T. F. "Measurements of the drag of slender cones in hypersonic flow at low Reynolds numbers using a magnetic suspension and balance" Oxford University Department of Engineering Science Report 1235/78, (1978). Dahlen, G. A. and C. L. Brundin "Wall temperature effects on rarefied hypersonic cone drag", Rarefied Gas Dynamics, 13th Symposium, Novosibirsk, USSR, (ed. Rebrov). Hirschfelder, J. O., C. F. Cutiss and R. B. Bird "Molecular theory of gases and liquids", 2nd ed., John Wiley and Sons, New York (1965). Davis, J., R. G. Dominy, M. N. Macrossan and J. K. Harvey "An evaluation of some collision models used for the Monte Carlo calculations of diatomic rarefied hypersonic flows", J. Fluid Mechanics, v135, p 355 (1983). Larsen, P. 1. and C. Borgnakke `Statistical collision model for simulating polyatomic gas with restricted energy exchange' Rarefied Gas Dynamics, 9th Symposium, (ed. Becker and Fiebig), paper A7, DFVLR Press (1974).
Q-Index Code E1
Q-Index Status Provisional Code
Institutional Status Unknown
Additional Notes Author's copy of: G. A. Dahlen, M. N. Macrossan, C. L. Brundin and J. K. Harvey, "Blunt cones in rarefied hypersonic flow: experiments and Monte-Carlo simulations", Proceedings of the 14th International Symposium on Rarefied Gas Dynamics, ed. H. Oguchi. University of Tokyo Press (1984), vol. I, pp. 229-240. ISBN 4-13-068109-5 (UTP 69092)

Document type: Conference Paper
Sub-type: Fully Published Paper
Collection: School of Mechanical & Mining Engineering Publications
 
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Created: Fri, 22 Dec 2006, 12:21:06 EST by Michael N Macrossan