Accession Number:

AD0632797

Title:

THE REATTACHMENT OF LAMINAR CAVITY FLOW WITH HEAT TRANSFER AT HYPERSONIC SPEED

Descriptive Note:

Technical rept.

Corporate Author:

CATHOLIC UNIV OF AMERICA WASHINGTON DCDEPT OF MECHANICAL ENGINEERING

Personal Author(s):

Report Date:

1966-04-30

Pagination or Media Count:

65.0

Abstract:

A study of cavity flow is made based upon the analysis of a physical model and by referring to the experimental data of a particular test model with the reattachment surface perpendicular to free stream direction at free stream Mach number of eleven. The pressure and heat transfer in the reattachment zone may be predicted approximately by the flow quantities along the dividing stream line employing the mixing theory and stagnation heat transfer equation for a blunt body. Good agreement with experimental data is obtained. It is found that the value of the average mixing rate correlation function for the cavity flow is 15 and is equal to that value determined by Glick for separated flow caused by shock impingement. Semi -empirically, efficiency factor of compression equal to 0.67 at the reattachment is evaluated and the reattachment velocity gradient parameter for the particular test model is similar to this case of stagnation flow over blunt nose. It appears that the heat transfer at the reattachment surface perpendicular to the free stream direction may be predicted approximately by the stagnation point heat transfer equation for a two-dimensional blunt surface.

Subject Categories:

  • Fluid Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE