Hypersonic Rarefied Flow Over Sharp Slender Cones

Hypersonic Rarefied Flow Over Sharp Slender Cones
Author: Marvin I. Kussoy
Publisher:
Total Pages: 36
Release: 1972
Genre: Aerodynamics, Hypersonic
ISBN:
GET BOOK

Download Hypersonic Rarefied Flow Over Sharp Slender Cones Book in PDF, Epub and Kindle

Drag, heat transfer, and number flux were measured on sharp cones in the near free, molecule flow regime, and the results were compared with available Monte Carlo calculations. In general, the calculations predicted the magnitude of the data; however, the heat transfer and drag increased with increasing Knudsen number at a faster rate than predicted. Also the drag coefficients measured for the slender cones at high Knudsen number were higher than predicted for free molecule flow. These disagreements between theory and experiment could possibly be attributed to the simplicity of the surface interaction laws assumed in the theory. Reynolds analogy factors obtained from the experimental measurements agreed with free-molecule values and also with that obtained by the Monte Carlo technique.

An Experimental Investigation of Hypersonic Flow Around a Slender Cone

An Experimental Investigation of Hypersonic Flow Around a Slender Cone
Author: Edward M. Schmidt
Publisher:
Total Pages: 44
Release: 1967
Genre:
ISBN:
GET BOOK

Download An Experimental Investigation of Hypersonic Flow Around a Slender Cone Book in PDF, Epub and Kindle

The paper presents the results of an experimental survey of the flow field around a sharp, 10 degree half angle cone. Tests were conducted at a free stream Mach number of 7.7 for a range of free stream Reynolds numbers of 110,000 to 171,000 per foot. Surface heat transfer data indicates that the cone boundary layer varies from laminar to fully developed turbulent over this Reynolds number range. The base pressure variation was also obtained throughout this range of Reynolds numbers; from this, the interrelation between the surface boundary layer properties and the base pressure is discussed. A series of tests were conducted in the near wake region at two different values of free stream Reynolds number, i.e., 330,000 and 1,650,000 per foot, corresponding to a completely laminar and fully developed turbulent surface boundary layer at the cone shoulder, respectively. The relationship between boundary layer properties and near wake properties is studied. (Author).