查询词典 axial flow

An exact solution of velocity distribution for Couette shear flow in a non circular conduit with axial symmetry section is obtained in this paper.

从N S方程出发，得到了轴对称异型断面管纯剪切流动速度分布的一般解，进而推出了纯剪切流动有限宽度矩形断面管的速度分布和流量计算公式，证明了库特剪切流是有限宽度矩形断面管当宽度趋向无穷大时的一种特例。

When the flowing pressure is lower than the saturation pressure,the inflow performance curve concave to the pressure axial causing a maximum flow rate point.

当流压低于饱和压力以后，流入动态指示曲线凹向压力轴，会出现一个产量最大点。

This research change axial configurative tongue design with aperture or comb shaped ; and adopt laboratory tests to verify its feasibility. The results be proved these different changes can decrease cross-flow fan BPF peak, in particular reduce 8 dB noise effects at specific rpm.

本研究提出改变状轴向舌端构形之设计，采以实验方法来验证其可行性且结果显示具梳状与穿孔形之舌端可有效改善横流扇之声音品质及BPF 基频峰值，在特定转速下可降低8dB之效果。

It shows that flow field of vertical vortex is not only the function of the radial coordinate but also the function of the axial coordinate.

运用数值模拟具有能模拟各种不同边界条件的优势，还对非对称来流条件下形成的立轴旋涡进行了模拟。

Base on the Fluent software,the time-average N-S equation,RNG k-ε turbulence modeling,P1 radiant modeling and particle track modeling,example for boost motor PQM-1 of Titan 4,by using flow-solid coupling boundary condition,the 2D axial symmetry gaseity fluid modeling and two phase fluid modeling were founded and the influence of coagulate particle to the flame-spread process in large aspect ratio SRM ignition transient were analyzed.

0引言固体火箭发动机点火过程是点火燃气流动与火焰传播相互耦合的过程，即包括点火燃气流动、药柱加热、局部点燃、火焰传播、室压建立等复杂的非定常过程，其中火焰传播在点火瞬态过程中占有重要地位，是发动机点火延迟、压强峰值过高、断续燃烧和熄火的主要因素，因此国内

The effects of different parameters and cross-sections on axial velocity, the distribution of secondary flow, temperature field, turbulent kinetic energy, wall friction coefficient and wall Nusselt number are analyzed in detail.

详细分析了充分发展的和发展段的湍流管道内，不同截面形状和几何参数对轴向速度分布，截面二次流结构，湍动能，曲线管道摩擦比，温度分布和曲线管道Nusselt系数比等管道流动和传热特性的影响。

In order to control the flow separation by reducing the diffusion factor and enlarging the diameter of inner circle, the meridian plane profile of the return channel was redesigned, which is achieved by substituting arbitrary curve for the circle with no change of the axial length of the stage. Bezier curve with eight parameters was chose to describe the shape of meridian plane profile, and the optimization of the meridian plane profile was implemented combining back-propagation neural network with genetic algorithm.

改进的主要思路是减小弯道前半部分通道的扩压度，并同时加大弯道出口内侧的转弯半径，主要做法是在不增加整级轴向尺寸的前提下，用任意曲线取代传统弯道的同心圆环结构，给定弯道回流器子午型线的外侧型线，采用Bezier曲线对内侧型线的2段曲线进行参数化描述，利用遗传算法和反向传播(back-propagation，BP)神经网络相结合的方法对内侧型线进行优化，得到新的弯道回流器子午型线。

By using a wide field stereo-microscope and a CCD video camera system,the axial liquid flow and dryout pointin vertical rectangular capillary microgrooves heat sink were observed and measured under pure evaporation heat transfer conditions.An experimental study of the influences of microgroove geometric parameters and working liquids on wetting height was conducted.

利用宽视场体视显微镜和CCD摄像系统对纯蒸发换热情形下竖直放置的矩形毛细微槽群热沉中的液体沿微槽槽道方向的流动情况和干涸点高度进行了观察测量，并对微槽几何尺寸、工质等因素对润湿高度的影响进行了实验研究。

This thesis deals with the axial non symmetry of air flow in the cyclone, with change of single inlet to double inlet .

针对旋风器内气流轴不对称问题，从结构上改单进口为双进口。

The general model, including axial dispersion flow for the bulk fluid phase, diffusion equation described by Fick law for the particle phase and the equilibrium concentration given by a modified competitive Langmuir isotherm, was presented and discretized with Galerkin and orthogonal collocation into a series of ordinary differential equations.

为考察孔内扩散对模拟移动床分离过程的作用，采用综合速率模型对其进行研究，其中流动相模型为轴向扩散活塞流，颗粒相为Fick定律描述的扩散方程，液相和固相之间的吸附平衡采用改进的Langmuir吸附等温线。

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。