Accession Number : AD0646747

Title :   EFFECTS OF FOREIGN GAS INJECTION ON LAMINAR BOUNDARY LAYER STABILITY AT LOW MACH NUMBERS.

Descriptive Note : Final rept.,

Corporate Author : NAVAL ORDNANCE LAB WHITE OAK MD

Personal Author(s) : Powers,John O. ; Albacete,Lorenzo M.

Report Date : 12 SEP 1966

Pagination or Media Count : 28

Abstract : The stability characteristics of laminar boundary layer profiles including foreign gas injection were evaluated by solving the disturbance equations for the eigenvalues which define the minimum critical Reynolds number for neutral stability. The profiles utilized demonstrate the differences which accrue from using light and heavy molecular weight gases as the injectant. Results obtained by asymptotic procedures for Mach numbers less than 1.3 show that the heavier gas (carbon tetrachloride) resulted in markedly more stable boundary layers than a lighter gas (helium). (Author)

Descriptors :   (*LAMINAR BOUNDARY LAYER, STABILITY), (*GASES, INJECTION), TRANSPORT PROPERTIES, AIR, HELIUM, CARBON TETRACHLORIDE, TEMPERATURE, MACH NUMBER

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE