Aimed at the jet noise which is induced by the expand structure and tail tube in the resistant muffler, a finite element model at lowMachnumber was developed.
针对抗性消声器中扩张结构和尾管引起的射流噪声问题，建立了低马赫数射流噪声有限元分析模型。
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The results show that the transition more likely happen under the situations with high azimuthal wave number and speed, and at a relatively lowmachnumber and high Reynolds number.
Based on similarity Principles and some typical operating mechanisms of combustion engines, the present paper suggests the modeling rules of steady performances of combustors at low flow Machnumber.