小型ターボジェットエンジンのエンジン性能・ジェット騒音へのシェブロンノズルの影響

抄録

This paper describes a research on a jet noise reduction device, a chevron nozzle. Chevron nozzles reduce the jet noise by an effect of promoting the mixing of high velocity jet and external flow. However, they tend to cause a thrust loss at the same time. In this research, experiments have been conducted using a small turbojet engine to evaluate the effect of chevron nozzles on the engine performance from both aspects of jet noise and thrust. In this paper, the experimental results of the Nozzle III, newly manufactured based on the results of previous research, have been reported. The comparison of the results of previous research and experimental results of Nozzle III has been made and the effectiveness of Nozzle III has been reported.