Acoustic Characteristics of Pulse Detonation Engine with Annular Nozzle

doi:10.12382/bgxb.2021.0241

Abstract

Abstract: The nozzle has a significant influence on the performance of detonation engine and acoustic characteristics of detonation acoustic wave.An acoustic wave experimental system is constructed in free space to explore the detonation acoustic wave characteristics of pulse detonation engine with annular nozzle，and the acoustic characteristics of pulse detonation engine, such as time-frequency domain characteristics，sound field directivity and duration, are measured and analyzed.The experimental results show that the annular nozzle changes the energy distribution of detonation acoustic wave and has the significant influence on detonation acoustic characteristics. The rising duration of detonation acoustic wave in 0° direction is relatively longer. The peak sound pressure of pulse detonation engine in 90° direction is the highest，and its attenuation speed and amplitude are the largest.The detonation acoustic wave radiates the most energy in 90° direction.The a duration of detonation acoustic wave of pulse detonation engine decreases with the increase in propagation angle.

Key words: pulsedetonationengine, detonationacousticwave, annularnozzle, acousticcharacteristic

CLC Number:

V235.22

KANG Yang， LI Ning， HUANG Xiaolong， WENG Chunsheng. Acoustic Characteristics of Pulse Detonation Engine with Annular Nozzle[J]. Acta Armamentarii, 2022, 43(5): 1075-1082.

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