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),
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 13, 1967
- Accession Number
- AD0673231
Entities
People
- E. N. Bogomolov
Organizations
- National Air and Space Intelligence Center