EFFECT ON HEAT EXCHANGE AND FRICTION OF COOLANT SUPPLY IN TURBULENT BOUNDARY LAYER (VLIYANIE NA TEPLOOBMEN I TRENIE PODACHI OKHLADITELEI V TURBULENTNYI POGRANICHNII SLOI),
Abstract
One of the most effective means for protecting walls from the effect of high temperature gases is transpiration cooling effected by injection of liquids or gases through the porous wall into the boundary layer. This subject is reviewed in the report which covers a total of 86 studies including 35 Soviet works. The following Soviet studies are included: Three theoretical studies by Motulevich, in which transpiration cooling is analyzed and the integration of the boundary layer equations is attempted. Kutateladze presented analyses, made with the assumption that the sublayer is destroyed and that boundary layer conditions are similar to those at an infinite Reynolds number. These studies yielded relationships for the friction and heat transfer coefficients as a function of the intensity of the coolant injection. Romanenko studied the injection of air, helium, carbon dioxide, and freon-10 into a subsonic turbulent boundary layer on a porous copper plate experimentally. Mugalev's studies with the injection of air and other gases through a porous plate into a sub- or supersonic air stream included methods for calculating the heat and mass transfer. Sergeev studied the intensification of heat transfer by use of coolants, such as water, acetone, benzene, and butanol, which evaporate. Equations for calculating the heat and mass transfer during the evaporation of liquids from porous ceramic plates were derived. Isachenko studied cooling by injecting water through a porous copper plate, and Fedorov measured velocity and temperature fields when water is injected through a porous ceramic plate. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 16, 1967
- Accession Number
- AD0669527
Entities
People
- P. N. Romanenko
- V. N. Kharchenko
- Yu. P. Semenov
Organizations
- National Air and Space Intelligence Center