Accession Number : AD0697618

Title :   INCREASING THE EFFICIENCY OF TRANSPORT GAS TURBINE ENGINES BY USING CYCLICAL COMBUSTION,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Mikhaltsev,V. E.

Report Date : 19 MAY 1969

Pagination or Media Count : 14

Abstract : A method is proposed for increasing the efficiency of a gas turbine engine by introducing a cyclical combustion process. The engine consists of a common receiver containing 29 combustion chambers provided with automatic inlet valves. From each chamber the gas flows into the nozzle diaphragm channels. The double arrangement of the combustion chambers along the periphery was dictated by the necessity of reducing the inlet flow velocity by increasing the chamber cross-section area. The air flows through an annular slit between the chamber wall and special deflector, cools the flame tube, and after a 180-degree deflection, enters the cascade of automatic valves. In the cyclical combustion regime the fuel, which is supplied with a plunger-type pump, is atomized and ignited by the chamber wall and by the remaining combustion products. The pressure rise in the chamber closes the valves, which cut off the air flow from the receiver. The combustion stability and efficiency depend on the cycle frequency. The efficiency of cyclical combustion increases with the increase in the heat liberation rate and the reduction of the nozzle diaphragm area in a high pressure turbine. The greatest efficiency may be achieved in low and medium power gas turbine engines. In gas turbine engines with output powers up to 5000 kw operating with cyclical combustion and a 300-500 kcal/sec heat liberation rate, the efficiency can be increased. (Author)

Descriptors :   (*GAS TURBINES, EFFICIENCY), (*COMBUSTION, PERIODIC VARIATIONS), JET ENGINES, COMBUSTION CHAMBERS, NOZZLE GAS FLOW, JET ENGINE VALVES, STABILITY, USSR

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE