OS-506 Research and Development of Mixer-Ejector Nozzle for Noise Reduction(Organized Session 5: HYPR-HST/SST Propulsion System)

概要

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The capability of jet noise reduction by using mixer ejector nozzle with ceramic acoustic liner was demonstrated in the engine noise test under the international research program on the future SST/HST (Supersonic transport and Hypersonic transport) propulsion system called HYPR. In the initial phase of the program the engine cycle and the configuration was selected considering that one of a critical issue for the next generation SST is an engine noise. Engine noise is a strong function of the exhaust jet velocity. Through the series of model tests in the anechoic wind tunnel, the configuration of mixer ejector for the engine noise demonstration test was selected by optimising design parameters of mixer lobe, ejector duct, and acoustic liners to achieve maximum noise reduction with minimum thrust loss. Useful data such as far field noise shape, in-duct acoustic signals, jet noise source distribution, and the effect of mixer ejector with and without acoustic liner were obtained and the noise control technology for the next generation HST/SST was developed through the program.
公益社団法人日本ガスタービン学会の論文
1999-11-14