Development of a Low Emission Combustor for a 100kW Automotive Ceramic Gas Turbine: I

Abstract

A low emission combustor for a 100kW ceramic gas turbine, which is intended to meet Japanese emission standards for gasoline passenger cars, has been designed and subjected to initial performance tests. A prevaporization-premixing combustion system was chosen as the most suitable system for the combustor. The detailed combustor design, including the use of ceramic components and fuel injectors, was pursued taking into account the allowable engine dimensions for vehicle installation. In the initial performance tests conducted at a combustor inlet temperature of 773K, a low NOx level was obtained that satisfied the steady state target at this temperature level.

Status of the Automotive Ceramic Gas Turbine Development Progrem: Year Four Progress

“…It is estimated from the stress analysis that the maximum stress of the turbine rotor is 290MPa at the rated speed of 110000rpm, and reaches 280MPa about 40 seconds after starting. As for the rotor evaluation, several kinds of tests were conducted such as cold and hot spin burst tests, and endurance tests combined with the turbine nozzle at elevated temperature [4]. Recent rotors made of three kinds of silicon nitride, SN9 1, SN253, EC 155, were fabricated and evaluated.…”

“…sible for the design of an experimental ceramic gas turbine engine and the subsequent evaluation of its performance. The objectives and outline of this project, including basic engine design and some test results, have been reported so far in references [1][2][3][4][5][6][7][8]. Fig.…”