查询词典 axial flow

1The axial evolution law on the structure and the aerodynamic characteristics of the asymmetric flows around slender bodies of revolution at incidences is summarized:whether the flow asymmetry is powerless or powerful,the flow always appears in the structure that lee-side vortices rise,and shed vortices form,and new lee-side vortices come into being alternately on opposite sides of a slender body of revolution axially from nose apex downstream to afterbody,and always induces the sectional side force of waving quasi-sinusoidally downstream axially.

1总结出细长旋成体有攻角非对称绕流流场结构和气动力特性的轴向演化规律：无论非对称性强弱，沿轴向从头部尖顶往后体，非对称绕流总是呈现为左、右两侧背涡交替从物面向上飘起、形成脱落涡、再衍生出新生背涡的流场结构，并诱导出沿轴向呈类似正弦曲线形式振荡分布的截面侧向力。

Meanwhile through result analysis, the axial symmetry flow hypothesis in some computations and design is denied, the design method of enlarging flow from another angle is also verified.

同时通过结果分析否定了一些计算、设计中采用的轴对称流动的假定，并且也从另一个角度印证了加大流量的设计方法。

A theoretical analysis method for head-flow rate curves of helico-axial multiphase pump was proposed on the basis of the basic energy equation for axial pump and Bernoulli equation.

基于轴流泵的基本能量方程式和伯努利方程，提出了螺旋轴流式多相混输泵的扬程—流量特性曲线的理论分析方法。

Generally, the cross flow fan operating noise totally about 55 dB, but in the midnight when prominent frequency noise has become extremely annoying. This research attempted to different axial configurative tongue designed to improve penetrating single frequency noise of cross-flow fan.

一般而言，横流扇的运转噪音约55dB左右并不算大，但是在夜深人静时某些特别突出的单频噪音却显得极度恼人，因此本研究尝试以不同之轴向舌端构形设计来改善横流扇之尖锐单频噪音；并将录制之声音以音质参数分析，找出较佳的舌端与叶轮扭转角度搭配。

Taking HPAM solutions as an example , the unsteady flow of power-law fluid in eccentric annuli with the inner cylinder reciprocating axially is calculated; the distribution of velocity, flow rate and:stress distribution on the outwall of the inner cyinder is obtained; the effect of eccentricity, stroke and frequency on distribution of velocity is analysed; the effect of eccentricity and axial movement on stress distribution on the outwall of the inner cylinder is analysed too.

在计算上，以HPAM水溶液为例，数值计算了幂律流体在内管做轴向往复运动的偏心环空中的流动，得出了这种流动的速度，流量和流体在内管壁上的压力分布；分析了环空偏心度以及内管冲程和冲次对流体速度分布的影响；分析了环空偏心度和内管轴向运动对流体在内管壁上压力分布的影响。

Numerical simulation to three-dimensional turbulent flow in multistage axial compressor blade row is carried out, where high resolution third-order ENN scheme is adopted to catch the shockwave and simulate the turbulent flow correctly, and LU-SGS implicit method is chosen to improve computation rate. A nicety and high efficiency numerical simulating system is thus constructed.

对多级轴流压气机叶栅内三维紊流流场进行数值模拟，采用高精度高分辨率的三阶ENN格式以保证对激波的捕捉和对紊流特征的正确模拟，利用LU-SGS隐式解法提高了计算速度，从而构成了一种既准确又高效的多级跨声速轴流压气机紊流流动数值求解系统。

The pressure fluctuations were measured at different positions along the axial direction on the tonge. The coherence analysis was utilized for illustrating the blade passing frequency cancellation mechanism. A 3-D flow visualization method, which overcame the blind slight from LDV and PTV, was used to present the differences of internal flow patterns.

实验中分别进行0度、5度与10度三种叶轮扭转角之设计，在横流扇出风口以声学人偶进行噪音量测，评估不同叶轮扭转角在操作转速下之风扇噪音、并分析其声音品质；另外在舌端上不同的轴向位置撷取其压力扰动频谱进行相干性分析，探讨舌端上因不同叶轮扭转角对周期性压力扰动之破坏之探讨。

Performance prediction of the pump when transporting water and salt solution is also studied.Results are compared and analyzed with experimental data.6.The salt-out flow field is measured on three dimensions by Particle Image Velocimemter via radial and axial two test models.After image processing, velocity distribution of crystal particles in the pump is obtained.Particle flow field is visualized to reveal the particle motion law intuitionally.

此外对泵送清水和盐溶液时的性能也进行了预测，并将结果与外特性试验数据对比。6、运用PIV在径向和轴向两种测量模式下对泵内不同外部条件下盐析两相流场进行了准三维测量，经图像后处理，获得了盐析晶体颗粒在叶轮内、无叶腔中及轴面上的速度矢量分布，实现了颗粒流场的可视化，更为直观地揭示了泵内盐析颗粒的运动规律。

Thus, in less than DN 50 (2 in) the pipeline, the frequent changes in the flow of cleaning fluid is a better 5, since the balance, axial piston, non-automatic check valve is recommended to use the pipeline in the flow fluctuations, such as reciprocating compressors and pumps export pipeline.

因此，在不大于DN 50(2 in)的管道中，对于频繁地改变流向的清洁流体是比较好的5、自平衡，轴向活塞，非自动式止回阀，推荐止回阀用在流量波动的管道中，如往复式的压缩机和泵的出口管道。

The simulation results shows that when the hydroforming for real axle housing needs two bulge processes and the specific value of the two bulge ratio is about 1, the result is the best one; To obtain an appropriate route of loading force need adjust internal pressure and axial compression force for many times and according to the failure, the size of the two forces which has been mentioned can be rapidly and rationally adjusted; Because of good greasing conditions influencing largely, reducing the friction between tube blank and die inside surface as well as possibly not only makes more materials flow into the bulge area but effectively diminishes the axial compression force; The good or bad characteristics of tube blank material is also one of the decisive factors and when material is selected, we first consider its' formability.

模拟结果表明，当后桥壳需要两次进行胀形，两次胀形比比值约等于1时，胀形结果最好；合适的加载路径要经过多次调试，能根据胀形缺陷对内压力和轴向力的大小进行迅速地合理调整；良好的润滑环境对后桥壳液压胀形的影响巨大，要尽量减小管坯与模腔内壁的摩擦力，不但使更多的材料流入胀形区，而且能有效的降低轴向力的大小；管坯材料性能的好坏也是影响胀形的决定性因素，选材时首先要考虑材料的成形性。

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。