外部流 meaning in Chinese
external flow
Examples
- Under the assumptions of linearized potential flow , the coupled problem of flow in the interior and exterior fluid regions is solved by an eingenfunction - expansion approach
在线性有势流的假定下，用特征函数展开方法求出了内部和外部流场的解。 - The outer flow field over high - speed train is complex turbulent now which cause some unfavorable innuences to thc train and to the surmundings . so it is attended and studied by researchers of the vehicle aerodynamics all the time
高速列车的外流场是复杂的三维紊态流，这一紊态流对列车和周围的环境造成许多不利的影响，因此高速列车外部流场的状态一直是车辆空气动力学者所关心的问题。 - The 3d turbulent flow fields around high - speed trains of four kinds of model uain have been calculated by 3d parallel compute program coded with the algorithms presented in this thesis . from the calculation results , the aerodynamic drag of different types of model trains are obtained , some characteristics of the flow field over the high - speed train are analyzed preliminarily such as pressure distribution and diversification , velocity distribution and diversification , and the affections of different train head shape to pressure . velocity , pressure gradient and the like
用三维并行计算程序模拟了四种不同高速列车车型的外流场，获得了不同车型的运行阻力；详细分析了列车附近流场的压力分布及其变化情况，讨论了列车头型对列车通过时产生的压力波动的影响；分析了四种车型外部流场的速度分布规律及其变化情况，分析了列车头部形状对它们的影响。 - The porous diffusion type silencer is widely used to reduce the air flow noise because of its small volume and high noise attenuating ability . the out case of the silencer plays a very important role in reducing noise . the effect of the hole ' s shape , diameter and the distance between neighboring holes as well as the matchup between the case and the sound absorbing material tube are investigated experimentally . the relation between the out - flow noise and the gas velocity distribution is carefully studied for two different kinds of matchup between the case and the sound absorbing material tube . some useful results are gotten , which may be valuable to the design of the silencer
多孔扩散型消声器由于其体积小、消声性能高而广泛应用到排气噪声的降低上，其外壳对消声器的消声性能具有重要作用.本文对此类消声器外壳的孔型、孔径和孔距以及外壳同消声材料的配合方面进行了细致的实验研究，特别对外壳与消声材料的配合与其排放噪声以及外部流场之间的关系进行了探讨，得到了一些有用的结论，对消声器性能的提高具有一定指导意义。 - Accordingly the whole understanding to the pressure and velocity state of flow field around high - speed train is comprehended . for the strength and stiffness design of the train body , resistance wind design of the facilities around high - speed railways and working standard of safe and action for acting people surrounding the train , a reliable criterion for the construction of high - speed railways is presented from the re
从而得第11页西南交通大学搏士研究生学位论文到列车外部流场中压力和速度分布状况的较为完整的认识，为列车的强度设计，列车周围设施的抗风设计以及路边作业人员的安全和行为规范的制定提供了一个可资参照的依据。