Abstract: The characteristic of rocket noise is one of the important factors in integration of rocket system Rocket noise of a single chamber two stage rocket motor was measured and analyzed, and the changing range of the its peak frequency was obtained According to the result of the joint time frequency analysis, the peak frequency had little relation with chamber pressure But noise magnitude had close relation to chamber pressure Experiment result serves as important reference to prediction of rocket noise

Key words: Engine noise;Dual thrust rocket engine;Jet flow;Acoustic measurement;Noise intensity

摘要： 火箭燃气射流噪声特性是武器系统集成化所考虑的重要因素之一。通过对单室双推力实验发动机近场射流噪声的测量与分析 ,得到噪声峰值频率的变化范围。联合时频分析结果表明 ,同一测量位置处射流噪声的峰值频率与燃烧室压力的变化无关 ,而噪声幅值则依赖于燃烧室压力。实验结果对火箭燃气射流噪声场的预测提供了实验依据

关键词: 发动机噪声;双推力火箭发动机;射流;声学测量;噪声强度