| 摘 要： |
The Pulse Detonation Engine (PDE) stands out as a leading contender for efficient engines capable of achieving hypersonic speeds. In this paper, we encapsulate a thorough investigation into PDE acoustics, unveiling critical factors that influence its sound characteristics such as sound pressure level, peak noise, and overall sound pressure level. The study explores the distinct acoustic signatures produced by the detonation process, detailing the variation in sound characteristics under different operational conditions. The paper reports precise measurements of time-frequency properties, including the shock wave energy and intensity distribution across frequency bands. The analysis provided significant output which shows at 20 Hz, the sound pressure level is notably high at 157.1 dB; peak noise levels observed at 4 Hz and 5 Hz suggest that the PDE generates particularly intense noise in the low-frequency range; and at 20 Hz, the overall sound pressure level varies from 8 dB to 148.18 dB. These results provide information on the pulse detonation engine's acoustic properties, identifying certain frequencies at which it produces loud noises and suggesting possible consequences for both environmental effect and operational efficiency. The comprehensive review serves as a valuable resource for noise control measures, propulsion system design, and influencing future developments in PDEs.
脉冲爆震发动机（PDE）是实现超音速运行的高效发动机中的领先候选者。本文对PDE的声学特性进行了全面研究，揭示了影响其声音特性的关键因素，包括声压级、峰值噪声以及整体声压水平。研究探讨了爆震过程所产生的不同声学特征，并详细分析了在不同工作条件下声学特性的变化。文章报告了时间-频率特性的精确测量结果，包括冲击波能量和各频带内的强度分布。分析结果显示，在20 Hz时，声压级显著达到157.1 dB； 在4 Hz和5 Hz处观测到的峰值噪声表明，PDE在低频段产生特别强烈的噪声； 而在20 Hz时，整体声压水平则从8 dB波动至148.18 dB。这些结果提供了脉冲爆震发动机的声学特性信息，指出了其产生响亮噪音的特定频率，并提示了对环境影响和运行效率可能产生的后果。该综合综述为噪声控制措施、推进系统设计以及推动脉冲爆震发动机未来的发展提供了宝贵的参考资源。 |
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