应用升力面理论涡格法和面元法，建立了拖式吊舱推进器非定常水动力性能的数值计算方法。
Based on potential flow theory, a numerical method is proposed for predicting the steady and unsteady hydrodynamic performances of puller type podded propulsors.
在波浪动力的理论和实践的基础上，促进了浪翼和鱼尾型推进器的深入研究。
The research of wave-wing type and fishtail type propellers has been promoted based on the theory and practice of wave-mechanics.
因此，移动的距离是不一样的，因为推进器的“滑动”背后的理论距离，它应该与每个旋转旅行。
Therefore the distance traveled is not the same, since the propeller is "slipping" behind the theoretical distance it should travel with each rotation.
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