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涡声
相关语句
  vortex sound
     As for computation of sound field, the Curie equation is directly and numerically solved to analyze the distribution of sound sources and the characteristics of their radiated sound field at Re=100 and to compare with the solutions from the theory of vortex sound and the spectrum of the fluctuating force and separated vortices in the flow field. It is shown that this method is more successful.
     在声场计算方面,直接积分Curle方程,对R_e=100时的声源分布及其声辐射特性进行数值分析,并与涡声理论结果和流场中脉动力和脱体旋涡频谱进行比较,证明本文方法是成功的。
短句来源
     The panel method and the vortex sound theory were used to study the flowfield and the acoustic field caused by uniform flow with a vortex around NASA GA(W)-1 airfoil numerically. It is very useful for improving efficiency of turbomechine and reducing its radiated noise.
     本文运用面无法和涡声理论数值来研究具有旋涡的NASAGA(W)-1型翼型绕流的流场和辐射声场,这对于提高透平机械的效率及降低辐射噪声很有帮助。
短句来源
     Based on the Liepmann's theory of vortex sound, the sound power spectrum from the boundary layer transition recieved at the stagnation point of an axisymmetric body is analyzed and predicted by introducing the Lauchle's random indicator fUnction, and the loss in sound energy due to accoustic diffraction of the waves around the nose contour is taken into account.
     基于Liepmann涡声理论,通过引入Lauchle的随机指示器函数,对考虑了声波沿回转体头部曲面传播的声绕射损失的回转体边界层转捩区辐射到头部驻点处的声功率谱进行了分析和估算。
短句来源
  “涡声”译为未确定词的双语例句
     So it is an effective way to reduce impinging tone by controlling large-scale vortex structure.
     因此抑制大尺度涡结构的发展是降低冲击单音的重要环节,可为冲击射流的降噪研究奠定涡声理论基础。
短句来源
     Experimental investigations of perforated liners with bias flow based on sound-vortex theory
     一种以涡声理论为基础的声衬的实验研究与分析
短句来源
     In this paper, the recent researches on sound produced by vortex motion and flow control by acoustic excitation are reviewed, and some theories of vortex & sound interaction in compressible turbulence are summerized. Finally the application of numerical simulation in this area is discussed.
     综述射流和翼型绕流中涡声及声学控制流动的研究进展,总结涡、声干扰的若干基本理论,并讨论数值模拟在此领域中的应用.
短句来源
     Oseen vortex model is used to study the sound radiation of viscous attenuation of point vortex in free space,its spectrum is also presented in this paper.
     本文利用奥辛涡(Oseenvortex)模型,应用涡声理论研究了自由空间中点涡粘性衰减过程中的声辐射问题,并在此基础上进行了频谱分析。
短句来源
     In the experiment,the flow noise at valve downstream is bigger than that at the valve upstream,the valve noise produced by vortex motion.
     同时实验表明 ,阀门下游的流噪声大于阀门上游的流噪声 ,涡声是阀门噪声的主要来源
短句来源
更多       
  相似匹配句对
     SOME ADVANCES IN RESEARCH ON VORTEX AND SOUND INTERACTION
     干扰研究的某些进展
短句来源
     3-Dimensional Analysis of Sound Transmission in Ocean Eddy
     海洋中的三维传播分析
     Acoustic Microscopy Applications
     显微学的应用
     Sound TRACK
     原电影
短句来源
     A STUDY OF GROUND VORTEX
     地面研究
短句来源
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  vortex sound
Weakly non-linear analysis on identification of vortex sound >amp; heat and their interactions in shear flow
      
Convergence difficulties encountered in the casual application of the acoustic analogy to non-compact flow-structure interactions are resolved in a natural manner by the methods of vortex sound theory.
      
Entropy Splitting for High Order Numerical Simulation of Vortex Sound at Low Mach Numbers
      
We propose a qualitative model of this phenomenon in terms of Vortex Sound Theory.
      


The Von-Karman vortex street flow around a circular cylinder is successfully solved at Re=100, with the ADI-BGE schemes and the recent treatment of body boundary conditions being applied and a new acceptable pertubation model to being introduced solving incompressible N~S equations in the form of stream function and vorticity. The solutions of the flow field obtained are better than previous numerical ones, and agree with the experimental data more closely. Therefore, it can be used to study sound field numerically....

The Von-Karman vortex street flow around a circular cylinder is successfully solved at Re=100, with the ADI-BGE schemes and the recent treatment of body boundary conditions being applied and a new acceptable pertubation model to being introduced solving incompressible N~S equations in the form of stream function and vorticity. The solutions of the flow field obtained are better than previous numerical ones, and agree with the experimental data more closely. Therefore, it can be used to study sound field numerically. As for computation of sound field, the Curie equation is directly and numerically solved to analyze the distribution of sound sources and the characteristics of their radiated sound field at Re=100 and to compare with the solutions from the theory of vortex sound and the spectrum of the fluctuating force and separated vortices in the flow field. It is shown that this method is more successful.

本文从ψ-ω形式的不可压N-S方程出发,采用ADI-BGE格式及新的物面边界条件处理方法,并提出一种数值扰动模型,成功地计算了R_e=100时圆柱绕流卡门涡街流动,得到的流场结果比原有数值解准确,与实验结果符合良好,因而可用来进行声场数值研究。在声场计算方面,直接积分Curle方程,对R_e=100时的声源分布及其声辐射特性进行数值分析,并与涡声理论结果和流场中脉动力和脱体旋涡频谱进行比较,证明本文方法是成功的。

The panel method and the vortex sound theory were used to study the flowfield and the acoustic field caused by uniform flow with a vortex around NASA GA(W)-1 airfoil numerically. It is very useful for improving efficiency of turbomechine and reducing its radiated noise. By use of several know--hows of panel method accumulated through our numerical experiments, the flowfields at different attack angles were successfully solved. After that, the variation of acoustic pressure in the course of a vortex past the...

The panel method and the vortex sound theory were used to study the flowfield and the acoustic field caused by uniform flow with a vortex around NASA GA(W)-1 airfoil numerically. It is very useful for improving efficiency of turbomechine and reducing its radiated noise. By use of several know--hows of panel method accumulated through our numerical experiments, the flowfields at different attack angles were successfully solved. After that, the variation of acoustic pressure in the course of a vortex past the practical airfoil and the orientation of sound source were demonstrated by using the vortex sound theory. Finally, some useful conclusions related by the mechanism of sound generation and the characteristics of sound source about this type of flow noise were drawn out.

本文运用面无法和涡声理论数值来研究具有旋涡的NASAGA(W)-1型翼型绕流的流场和辐射声场,这对于提高透平机械的效率及降低辐射噪声很有帮助。采用作者积累的关于面无法的一些计算技巧,首先成功地求解了不同攻角来流时的流场,再用涡声理论计算了涡旋绕过翼型时声压场的变化及声源的指向性,最后给出了有关这种流动噪声的发声机理和声源特性的一些有用的结论。

The identification of vortex,sound and heat motions and the interactionsamong them are discussed by means of velocity split and perturbation method inthis paper.Especially the shear flow is considered.All the obtained weakly nonlinear equations have clear physics concept. Basing on the analysis, the interaction between first order sound and vortex and the creation of the second ordervortex are studied and some experiment phenomena of airfoil flow ontrol by soundare explained.

本文用摄动法详细研究了非均匀流动中涡、声、热运动模式的划分及其相互作用问题.特别讨论了剪切流情形,得到的各阶摄动方程和声、涡运动方程具有清晰的物理含义.在此基础上着重探讨了声、涡一阶作用以及二阶涡的生成,由此解释了声学控制流动中的部分实验现象.

 
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