helicopter tail rotor meaning in Chinese

直升机尾桨

Chapter 4 presents the mechanism of helicopter tail rotor noise , developed a new analytical model to investigate the noise of tail rotor when helicopter fly forward
在第四章中,通过对直升机尾桨噪声的机理分析,建立了前飞状态下尾桨噪声的计算模型。
In this thesis , the major contributions of the author ’ s research work are as follows : at first , the classification of helicopter tail rotor noise sources and the existent method of helicopter noise research is introduced briefly
本文采用谐波分析法对直升机前飞状态下的尾桨噪声进行了理论分析研究。主要工作包括:本文首先简要介绍了直升机噪声的分类以及国内外直升机噪声研究方法的现状,总结了前人的研究成果。
In chapter 2 , the fluctuate equation of monopoly sound field and dipole sound field is deduced detailedly , the root of this equation is given . analytical models is developed to investigate the noise of helicopter tail rotor , that is to say : the thickness noise and the loading noise is determined by a monopole source and a dipole source respectively
在第二章中对单极子声场和偶极子声场的波动方程及其求解做了详细的理论推导,建立了直升机尾桨的厚度噪声和载荷噪声计算模型,即可分别用单极子和偶极子声源描述厚度噪声和载荷噪声。