航空学报 > 1994, Vol. 15 Issue (7): 769-773

一种亚音螺旋桨声场中间面快速算法

李晓东, 孙晓峰, 胡宗安, 周盛   

  1. 北京航空航天大学407教研室,北京,100083
  • 收稿日期:1992-10-30 修回日期:1993-04-15 出版日期:1994-07-25 发布日期:1994-07-25

A NEW IMPROVED MEAN SURFACE METHOD FOR SUBSONIC PROPWLLER NOISE PREDICTION

Li Xiaodong, Sun Xiaofeng, Hu Zongan, Zhou Sheng   

  1. Faculty 407 of Beijing University of Aeronautics and Astronautics,Beijing,100083
  • Received:1992-10-30 Revised:1993-04-15 Online:1994-07-25 Published:1994-07-25

摘要: 发展了一种改进的亚音螺旋桨声场中间面快速算法。通过引入薄翼假设,在时域里求解FfowcsWilliams&Hawkings(FW-H)方程,对处于自由空间中的亚音螺旋桨声场进行预测。数值计算结果表明,与目前广泛运用的全表面公式(SFSM)、旧中间面公式(OMSM))相比,新发展的快速近似算法(NMSM)所需计算时间和计算机内存约为SFSM方法的50%,OMSM方法的50~60%。若与跨音消失球法(TCSM)相比,所需CPU时间只有TCSM法的10~13%;而且计算结果也在工程精度允许范围内。在螺旋桨工程设计初期以及所需精度不太高的场合,该法不失为一种可靠的快速算法。

关键词: 螺旋桨, 螺旋桨噪声预测, 气动声学

Abstract: A new improved mean surface method(NMSM)for propeller noise prediction is presented,based on solving the Ffowcs Williams & Hawking(FW-H)equation in time domain. Numerical calculations show that the NMSM needs only 50% of CPU time and memo-ry of subsonic full surface method(SFSM),50~60% of CPU time and memory of old mean sur-face method(OMSM)and 10~13% of CPU time of transonic collapse sphere method(TCSM),while the calculation accuracy can be assured.Thus,the NMSM could be a good alternative method for subsonic propeller noise prediction,especially in preliminary aeroacoustics design of a new propeller.

Key words: propeller, propeller noise prediction, aeroacoustics

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