Accession Number : AD0673231

Title :   THE PROBLEM OF THE INFLUENCE EXERTED BY THE RELEASE OF COOLING AIR FROM BLADES INTO THE FLOW-THROUGH PORTION OF A GAS TURBINE ON THE EFFICIENCY OF THE LATTER (K VOPROSU O VLIYANII NA EFFEKTIVNOST GAZOVOI TURBINY VYPUSKA V EE PROTOCHNUYU CHAST OKHLAZHDAYUSHCHEGO VOZDUKHA IZ LOPATOK),

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Bogomolov,E. N.

Report Date : 13 SEP 1967

Pagination or Media Count : 19

Abstract : An approximate theoretical investigation was made of the effect on the efficiency of a gas turbine stage of the discharge of blade cooling air from the rotor or nozzle blades into the main gas stream. The investigation, based on general turbomachinery and gas dynamic theories, consisted in comparing the efficiencies of geometrically and aerodynamically identical turbine stages with and without the cooling air discharge. In addition, an analysis was made of the process of mixing the cooling air with the gas stream. The obtained results indicate that at high air-to-gas pressure ratios, the discharge of air from the nozzle blades can have a positive effect on turbine efficiency. A formula is derived for calculating the power generated as a result of the cooling air discharge. (Author)

Descriptors :   (*GAS TURBINES, EFFICIENCY), GAS TURBINE BLADES, COOLING, AIR, GAS TURBINE NOZZLES, JET MIXING FLOW, USSR

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE