"In the investigation of the problem, it is shown that the process of transpiration cooling is an effective method of cooling. This process may be applied to heat screens or heat shields, as was done in the sample problems worked out here. A porous plate with coolant flowing counter to the flow of heat was used.
The plate temperature is determined by the amount of heat flux, coolant flow, thermal conductivity of the material used as a plate, the specific heat of the fluid, the specific heat of the plate material, the density of the plate material and its porosity. In the steady state, the maximum temperature at the surface is dependent only on the heat flux and the mass flow rate of the coolant.
The mass flow rate and specific heat of the coolant are the most critical factors in controlling the plate temperatures. It should be emphasized that the values used in the sample problems solved here are arbitrarily chosen and by no means should they be considered as optimum conditions. It Is evident from the small temperature rise (94.8°F), of the first sample problem, that the mass flow of the coolant is greater than is required for the materials used.
Liquids may also be used as fluids for cooling. When liquids are used the heat required to vaporize the liquid also tends to lower the temperature of the plate, however, this gives rise to additional problems in pumping and pressure drops through the plate, to say nothing of the changes in volume due to vaporization of the liquid.
The plate temperature decreases rapidly after a short distance in the plate. Therefore this process with properly selected materials, would seem to have many applications in industry and research. Applying this process to heat screens or shields would allow thin plates to be used.
The potential of this method of cooling seems, to the author, to be great"--Abstract, pages 2-3.
Miles, Aaron J.
Remington, Charles R., 1924-2013
Schowalter, Ralph E., 1923-2001
Wolf, Robert V., 1929-1999
Lee, Ralph E., 1921-2010
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
Missouri School of Mines and Metallurgy
© 1961 Herbert S. Brahinsky, All rights reserved.
Thesis - Open Access
Heat -- Transmission -- Mathematical models
Heat -- Transmission -- Computer simulation
Print OCLC #
Electronic OCLC #
Link to Catalog Record
Brahinsky, Herbert S., "Transpiration cooling" (1961). Masters Theses. 2762.