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壁面     
相关语句
  wall
    Theory and Application of Hot Films for Wall Shear Stress Measurements and Experimental Investigation of ModelB-1 Hot Film Probe
    热膜法测量壁面剪切应力的原理和B-1型热膜的初步实验
短句来源
    OVERPRESSURE CALCULATION ON THE REFLECTION OF AIR SHOCK WAVES WITH MOVING RIGID WALL
    空气冲击波遇运动刚壁反射时壁面超压的计算
短句来源
    MEASUREMENT OF WALL FRICTION BY USING LASER FLUID STRAIN RATE METER
    应用激光流体应变率仪测量壁面阻力
短句来源
    Streaming Effect of Wall Oscillation to Boundary Layer Separation
    壁面振荡对边界层分离的影响
短句来源
    Surface Nonequilibrium Catalytic Reactions and Their Effects on Wall Heat Transfer
    壁面非平衡复相催化反应及其对传热的影响
短句来源
更多       
  wall surface
    Analysis on drag reduction mechanism of liquid slipping along solid wall surface
    液体沿固体壁面滑移减阻机理分析
短句来源
    Hydraulic characteristics and turbulent boundary layer in bucket of spillway dam with rough wall surface
    粗糙壁面溢流反弧水力特性及紊流边界层的研究
短句来源
    Numerical Computation of Laminar Flow Field around the Lug on Wall Surface
    壁面凸体层流绕流流场的数值计算
短句来源
    (2) When a particle comes into collision with a wall surface, fast rotation (up to 1800 cycles/sec) of the particle is induced by the friction on the wall surface.
    (2)当颗粒与壁面相碰时,由于壁面的摩擦力,造成颗粒高速旋转(可达1800n/s)。
短句来源
    One-way coupling method is used to compute the trajec-tories of particles in the turbulent boundary layers and potential flows. The erosion distribution of wall surface struck by particles are given and relationship between feature of boundary layer and erosion is analy-sed.
    采用单向耦合(One-wayCoupling)方法,计算了固粒在湍流边界层和无粘流中的运动轨迹,给出了壁面被固粒撞击后的冲蚀磨损分布,分析了近壁流场性态与壁面冲蚀磨损的关系。
短句来源
更多       
  on the wall
    TURBULENT BOUNDARY LAER STUDY OF FLOW BEHINDSMALL OBSTACLES PLACED ON THE WALL
    绕壁面小障碍物的湍流边界层研究
短句来源
    A Study on the Wall Shear Stress of Artery Model by Using Electrochemical Measuring Technique
    用电化学方法测试动脉模型壁面剪应力
短句来源
    Experimental Study on Multi-scale Coherent Structures in Turbulent Boundary Layer Controlled by a Group of Parallel Heating Wires on the Wall
    壁面平行加热丝控制湍流边界层多尺度相干结构的实验研究
短句来源
    THE FLOW WITH MASS TRANSFER AND LONGITUDINALVELOCITY ON THE WALL
    壁面传质扰动有纵向速度的流动问题
短句来源
    The Experimental Investigation of Wavelet Transform on Coherent Structure Influenced by Heated Wires on the Wall
    壁面加热湍流相干结构的子波分析实验研究
短句来源
更多       
  wall shear
    Theory and Application of Hot Films for Wall Shear Stress Measurements and Experimental Investigation of ModelB-1 Hot Film Probe
    热膜法测量壁面剪切应力的原理和B-1型热膜的初步实验
短句来源
    A Study on the Wall Shear Stress of Artery Model by Using Electrochemical Measuring Technique
    用电化学方法测试动脉模型壁面剪应力
短句来源
    The Method for Improving the Measuring Accuracy of the Wall Shear Stress by Electrochemical Technique
    提高电化学法测试壁面剪应力精度的方法
短句来源
    Investigation on Wall Shear Stress in Horizontal Air-Water Bubbly Flows
    水平管内气液两相泡状流壁面切应力的研究
短句来源
    It is found that drag reduction occurs with adequate wavenumbers and grows with an increase of H. The mechanisms are revealed through variations of velocity profile and the decrease of wall shear stress.
    将结果同部分湍流悬浮流减阻的实验结果进行定性比较。 分析减阻机理是流速分布曲线及近壁区速度梯度介于层流与湍流之间,H值增大引起壁面剪应力显著下降。
短句来源
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      wall
    High-resolution transmission electron microscopy observation indicates that the nanocapsules are hollow-structured with a wall thickness of about 6 nm.
          
    The results indicated that the polyvinyl acetal sponge modified by chitosan has an interconnected pore structure and the wall between large pores also has small pores.
          
    A glass carbon electrode modified with nickel-modified multi-wall carbon nanotubes (MWCNTs-Ni/GCE) was prepared.
          
    The XRD analysis indicated that the wood crystallinity of WMNC decreased, the MMT exfoliated and some nano silicate layers entered into the non-crystallized microfibrillar region of the wood cell wall.
          
    The SEM graphs of WMNC showed that some silicate grains were blocked in the wood cell lumen, some silicate layers adhered to the inner surface of the wood cell wall, and some exfoliated MMT layers even penetrated the wood cell wall.
          
    更多          
      wall surface
    The method uses generation of reactive aldehyde groups on the cell wall surface under conditions of periodate oxidation.
          
    The cases in which the wall surface is impenetrable to an evaporating substance and vapor concentration remains unchanged at the surface are considered.
          
    The temperature of the wall surface is assumed to be constant and equal to the gas temperature at a large distance from the droplet.
          
    Here account is taken of the interaction of the flows near the wall surface and in the so-called outer region [1].
          
    The effect of the disturbances introduced by creating a local step in the wall surface of the inlet section on boundary layer transition within the entrance length of a circular pipe is investigated.
          
    更多          
      on the wall
    The distribution along the channel length of the frictional resistance and heat transfer coefficients on the wall are obtained, and the variation of these coefficients with the load parameter is studied.
          
    When changing from the calculation of one system to another only the information on the wall changes; the computational program remains the same.
          
    The boundary layer building up on the wall in front of the injection nozzle is accordingly detached.
          
    The results are used to calculate matter flow density on the wall, to evaluate the length of the entrance region, and to obtain an analytical expression for the limiting Nusselt number in terms of the Peclet number.
          
    A supplementary condition at a fixed section [1-3] is set for the Prandtl equation in Crocco form describing traditional conditions on the wall, on the external boundary, and in the initial section.
          
    更多          
      wall shear
    Nonlinear evolution of turbulent spots in the near-wall shear flow
          
    Wall shear stress in the bulge part of the channel shows smaller values that affect largely the rate of heat transfer and Nusselt number shows minimum values in this region.
          
    Generally, however, these are accompanied by considerable increases in wall shear-stress.
          
    Results also show that predictions obtained with temperature variable nanofluid properties yield greater heat transfer capabilities and lower wall shear stresses when compared to predictions using constant properties.
          
    Finally, the wall shear stress distributions on the side, top and bottom walls of the square duct with the Mach 4 pseudo-shock wave were investigated qualitatively by the shear stress-sensitive liquid crystal visualization method.
          
    更多          


    In a previous paper[1], a theoretical analysis has been presented to the heat-transfer coefficient for laminar boundary layer flow in the entrance region of a circular tube. This is a succeeding one based on Karman's method of approach, to attack the entrance effect on flow-friction behavior of an isothermal boundary layer flow of incompressible fluid. The family of climensionless velocity profiles is well defined by eq. (3) and (4). The predicted friction coefficients from eq. (17) or (19), eq. (23), (25) and...

    In a previous paper[1], a theoretical analysis has been presented to the heat-transfer coefficient for laminar boundary layer flow in the entrance region of a circular tube. This is a succeeding one based on Karman's method of approach, to attack the entrance effect on flow-friction behavior of an isothermal boundary layer flow of incompressible fluid. The family of climensionless velocity profiles is well defined by eq. (3) and (4). The predicted friction coefficients from eq. (17) or (19), eq. (23), (25) and (26), eq. (28) and (30) respectively are in good agreement with the complicated Langhaar's solution[6] and data reported in the literature[3,5,7,16].

    本文是文[1]的继续。文中,在直圆管具有平滑进口及流体是不可压縮的假定下,对圆管进口段层流边界层发展区的流动阻力与壁面摩擦阻力作了环状边界层的理论分析,提供了常物性情况下的简捷近似計算解;并对新的实验资料及其經驗綜合式作了分析和討論,証明这些数据与以前文献中所报导的結果实质上相互符合,而文献[4]所推荐的綜合式还没有最真实地反映出原始数据的规律性。

    Some viewpoints different from the so-called Bulk Flow Theory for the turbulence in the lubricant film by G. G. Hirs are put forward in this paper, Hirs said that under any kinds of combinations of the shear flow and pressure flow it is possible to express the interconnections between the shear stress exerted on the wall and the mean velocity Um relative to the wall by a simple relationship, thus deriving the calculating method. But as pointed out in this article, there are several evident examples of the combinations...

    Some viewpoints different from the so-called Bulk Flow Theory for the turbulence in the lubricant film by G. G. Hirs are put forward in this paper, Hirs said that under any kinds of combinations of the shear flow and pressure flow it is possible to express the interconnections between the shear stress exerted on the wall and the mean velocity Um relative to the wall by a simple relationship, thus deriving the calculating method. But as pointed out in this article, there are several evident examples of the combinations of the shear flow and pressure flow which do not justify the above relationship. Since such kinds of combinations might often happen in the most important regions of the oil film, a given error can appear in the Hirs calculation.

    本文对于G.G.Hirs提出的关于紊流润滑的“整体流动理论(Bulk Flow Theory)”提出一些不同的看法。Hirs认为,在剪切流动和压力流动的任何一种组合下,都可以用同一个简单的关系来表达作用在壁面上的剪应力τ与相对于该壁面的平均流速u_m之间的关系,并从而得出他的计算方法。但是本文指出了一些明显不能适用这种关系的剪切流和压力流的组合情况,而这些组合情况往往是发生在油膜的最重要的部位上,于是就造成了一定的误差。

    Transonic flow in the throat region of hyperbolic Laval nozzles is analysed using the conformal curvilinear coordinate method. A solution to this type flow is given for the cases of different radii of wall curvature at the throat and different values of the ratio of the specific heats. The general behaviour of the transonic flow and Mach number distribution in the throat region are presented. This method gives fine accuracy. It can be applied in the designing of nozzles, especially, in the designing of aerodynamic...

    Transonic flow in the throat region of hyperbolic Laval nozzles is analysed using the conformal curvilinear coordinate method. A solution to this type flow is given for the cases of different radii of wall curvature at the throat and different values of the ratio of the specific heats. The general behaviour of the transonic flow and Mach number distribution in the throat region are presented. This method gives fine accuracy. It can be applied in the designing of nozzles, especially, in the designing of aerodynamic laser nozzles.

    本文采用保角曲线坐标方法分析双曲型喷管喉部跨声速流动特性,给出了跨声速双曲型喷管流动的一般解.这个解适用于不同的喉部壁面曲率半径,适用于不同的比热比.通过计算给出了不同比热比下喉部跨声速流场的主要参数与曲率半径的关系以及典型跨声速流场的等马赫数线分布.本方法计算简单,精度较高,可作喷管设计,特别是气动激光喷管设计参考.

     
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