2気筒パルスデトネーションタービンエンジンの性能と燃焼過程

概要

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A two-cylinder pulse detonation engine (PDE) with a single converging nozzle connected to an automotive turbocharger system was constructed. Hydrogen and air are injected through solenoid valves into the combustion tubes in which the mixtures are ignited alternatively for a given frequency. In this research, the frequency is selected as 80 and 100Hz. Power output from the turbine was measured by measuring that of co-axial compressor. The output obtained reached to 6kW and a rotational speed of the turbine reached to 105rpm while a thermal efficiency based on the lower heating value of hydrogen was 4% as maximum which was lower than the theoretically expected value. Combustion process was observed and it was elucidated that a turbine inlet peak pressure was not high enough because of decay of the shock wave in downstream of detonation tube and the steady detonation wave have not been established in the combustion tubes.