Accession Number:

AD0255485

Title:

HEAT TRANSFER, TEMPERATURE RECOVERY, AND SKIN FRICTION ON A FLAT PLATE SURFACE WITH HYDROGEN RELEASE INTO A LAMINAR BOUNDARY LAYER

Descriptive Note:

Corporate Author:

MINNESOTA UNIV MINNEAPOLIS HEAT TRANSFER LAB

Report Date:

1961-02-01

Pagination or Media Count:

1.0

Abstract:

An analysis is presented for a two-component laminar boundary layer on a surface with zero pressure gradient and with mass release. The system of partial differential equations describing the velocity, temperature, and concentration field is converted by a similarity transformation into a system of integral equations. Numerical solutions are obtained on electronic digital computers for air flow with hydrogen injection, for Mach numbers 0 to 12, for free-stream temperatures 123 to 2000 R, and for wall-to-free-stream temperature ratios from 12 to 6. Solutions for the condition of zero temperature gradient in the boundary layer at and normal to the wall surface lead to temperature recovery factors. The results are utilized to investigate the validity and accuracy of engineering correlations. The proposed correlations describe the reduction in heat flux into the wall surface and in skin friction reasonably well. No simple correlations have been found for the dependence of hydrogen mass fraction at the surface on the mass release rate and for the temperature recovery factor. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE