查询词典 axisymmetric flow

That is, both numerical simulation and model experiments are complemental to each other. The main point of the thesis are as following:1. Vertical pipe inlet/outlet is simplified as an axisymmetric model in the research, and flow field is simulated with second-moment Reynolds stress model and VOF.

本文的主要工作有： 1、将竖井式进／出水口概化为轴对称模型，应用雷诺应力模型和自由面常采用的VOF法，对抽水和发电工况下竖井扩散段、孔口、防涡梁下的水流流动特性进行了数值模拟。

Based on the state of the art of spray cooling, the following topics have been studied:As to a cone-axisymmetric spray cooling systems, the spray area was divided, and the slip-flow boundary condition was introduced. Based on an assumption of the coniform spray, an equivalent continuum model of the average spray density was established.

当前的研究工作大多集中在实验研究方面，然而由于不同研究人员实验条件的不同使得各种研究结论有所差异甚至相互矛盾，有关喷雾冷却的理论研究相对更加缺乏，因此针对电子器件的喷雾冷却技术的理论和实验研究都尚有广阔的发展空间。

Axisymmetric body ; potential flow ; illˉconditioned system ; prec ondition

回转体；势流；病态系统；预处理

Based on the mechanism of secondary flow formation and development in a turbine cascade, SINE function and polynomial function were applied to develop a non-axisymmetric endwall profiling method.

根据叶栅内部二次流形成和发展的机理，应用正弦函数和多项式函数建立了一种叶栅非轴对称端壁成型方法。

The theory of accretion disks are important for many astrophysical phenomena, including Quasars, active galatic nucleic, X-ray binary stars, and young stellar objects. The most important branch of accretion djsk theory is the stability properties of djsks. It is widely considered that the luminosity variations of various astronomical objects are associated with the instability of accretion disk. The viscosity plays an important role in the accretion disk theory, and magnetic field exists commonly in astronomical phenomena. A more realistic analysis of the stabihty of the accretion disk should include both the radjal and azimuthal perturbations because of the strong shear of viscous flow.In this paper, according to the luminosity Variations of Various astronomical objects, we study the radial-azimuthal instability of an isothermal with magnetic field. We find that the radial and azimuthal fields B〓,B〓 are mainly responsible for enhancing the instability of the magneto-acoustic modes and non-axisymmetric modes,and that pulsational oscillations are larger in the radial than in the Z direction. The model may be useful in explaining the periodic light variation of FU orionis and. T Tauri stars.

在许多天体物理现象中，例如活动星系核，X-射线双星和年青的恒星理论中，吸积盘理论起着重要的作用，而吸积盘理论中的一个重要分支是吸积盘的不稳定性理论，普遍认为活动天体的周期，准周期光变现象与吸积盘的不稳定性有关，在吸积盘理论中，粘滞起着重要的作用，而磁场是天体物理中普遍存在的现象，对于几何薄吸积盘不稳定性分析，由于强剪切流的缘故，应该包括径向和环向扰动两个方面，本文结合天体物理中的各种周期，准周期光变现象，研究了含磁场的等温薄吸积盘的径向-环向振荡不稳定性，结果表明：磁场的径向和环向分量对磁声模和非轴对称模的不稳定性的增加起着主要的作用，且径向振荡大于轴向振荡，所得结果有利于解释FU Orionis和T Tauri Stars的周期光变现象。

Secondly, the more complex inner and outer flow field is simulated around axisymmetric body with pump-jet (including no tip-clearance flow) with stator and rotor, and the numerical results are approved reasonable and inerratic by the contrast of the thrust and torque of rotor and stator to the experiment under the unself-propelled and self-propelled conditions.

紧接着，分析了推进器在非自航状态和自航状态下的性能、导管内部轴向、径向和周向速度场、压力场在相互作用中的具体形态和结构，并定性地分析了它们对水动力噪声、空泡生成以及振动的影响，为减少这些不利影响明确了解决的办法，为泵喷推进器的工程设计提供了切实可行的理论分析方法和技术思想，对工程实际具有重要的指导作用。

Reducing secondary flow losses is one of the key techniques to improve aerodynamic performance of turbomachine blade. Non-axisymmetric Endwall Profiling of turbomachinery blade has been proved to be an effective technique in reducing pithwise pressure gradient between pressure surface and suction surface.

降低叶栅内部二次流流动损失是提高透平机械通流效率的重要方法之一，非轴对称端壁成型技术已被验证能够有效地减小叶栅压力面与吸力面之间的横向压力梯度，降低叶栅内部二次流流动损失，提高叶栅效率。

Computer tomograph, ultrasound B and contrast radiography are applied to determine the moving boundary conditions, The penalty formulation and moving triangle elements have been successfully adopted and be flow fields for axisymmetric Newtonian bile flow have been obtained.

采用了CT，造影等技术获得运动的边界条件。采用了罚函数公式系统和移动三角形单元获得了轴对称胆汁流动的流场。

The flow field in the axisymmetric crenellated radial labyrinth seal is simulated by the present numerical scheme, which emphsizes on examining the influence of relative teeth engaging length τ/T on the sealing property. It is found that the sealing property is firstly improved with the increase of engaging length, and becomes worse as the τ/T further increase, thus an optimal τ/T is existed.

对锯齿型径向迷宫密封的内部流场进行了数值模拟，重点研究了齿啮合长度对密封性能的影响及其流体力学本质—射流偏转，确定了最佳齿啮合长度，并讨论了啮合不对中、向内和向外流动对密封性能的影响等。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。