本文采用声类比法探讨了射流中小尺度湍流远场噪声特性.此声类比理论基于线化欧拉方程及声源互易原理,建立了关联声源和远场声压的伴随格林函数,适于声波折射现象及小尺度湍流噪声计算.声场的边界采用完全匹配层边界条件,有效地避免了声波产生数值反射.为减小频散及耗散误差,时空导数均采用高阶预测-校正格式离散控制方程.计算结果与前人的实验相一致.
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