Investigation of Veil Cooling for Radial-flow Turbines

Download or read book Investigation of Veil Cooling for Radial-flow Turbines written by W. U. ROSSLER and published by . This book was released on 1961 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: ARE DESCRIBED. The study is concerned with the effect of introducing a thin film of cool gas between the main hot gas flow and the rotating turbine disk. The program was conducted in two parts. The first part, carried out by S, Test equipment, Infrared equipment, Heaters, Gas turbine nozzles, Rotating structures. Open-ended Terms: Radial-flow turbines. Results of an investigation into the behavior of veil (or film) cooling of a radial-inflow turbineARE DESCRIBED. The study is concerned with the effect of introducing a thin film of cool gas between the main hot gas flow and the rotating turbine disk. The program was conducted in two parts. The first part, carried out by AiResearch Manufacturing Company, comprised an experimental study of the cooling phenomenon on an actual, hot, high-speed turbine. The second part, being conducted at Stanford University, comprises an analytical study and a model experimental study designed to measure basic heat transfer coefficients. The effectiveness of veil cooling was measured by means of thermocouples imbedded in the rotor, with readings brought out through a precision slip-ring unit. Tests were made with several film thicknesses and under various operating conditions. Correlations of the data are presented and discussed. The results of the Stanford work are reviewed. Analytical predictions of heat transfer to a rotating disk are given. The model experimental apparatus is described and plans for the concluding test work are discussed. (Author).