结果表明环形截面上存在二次流动。
It is found that the secondary flow are taken place on the annular cross section.
研究了高宽比和壁面粗糙度对压力损失、二次流动和紊流强度的影响。
The influences of the aspect ratio and wall roughness on the coolant flow characteristics, which mainly involve pressure loss, secondary flow and turbulence intensity, were investigated.
水力机械的分离为三维流动，三维流动的侧向压力梯度产生边界层的二次流动。
The separation flow is three dimensional in hydraulic machine. The pressure gradient in cross direction produces secondary flow in boundary layer.
分析了各种流动参数和几何参数对轴向速度、二次流动、壁面摩擦力、摩擦系数比的影响。
We analyze the effects of the flow parameters and the geometrical parameters on the axial flow, the secondary flow and the friction.
利用直接数值模拟方法求得平板上V—型条纹表面上的降阻情况，并给出基于二次流动理论的降阻机理。
The drag reduction of plane-surfaces with V-shaped grooves is given out by direct numerical simulation, and the drag reduction mechanism in the base of the secondary flow theory is suggested.
讨论了曲率和挠度对二次流动、流函数等值线和轴向速度的影响，研究了不同曲率和挠度螺旋管道内流量与压力梯度之间的关系。
The effects of curvature and torsion on secondary flow, isoline of stream function and distribution of the axial velocity of flow were discussed.
转子尾迹在静子通道内追赶上从前一转子叶片通道内下来的叶尖泄漏涡，二者的相互作用和掺混导致静子尖区更为复杂的二次流动。
The wake is mixing with the last rotor tip leakage vortex in the stator passage, leading to more substantial fluctuations in the flow field.
叶栅中部和端部二次流均增强，总平均的二次流动能增大。对于该叶栅，叶片反弯曲亦不能提高叶栅流场的气动性能，直叶片叶栅总损失最小。
For the turbine stator cascade, the negative curving of blade can not improve the performance of the cascades as well, the total losses of straight cascade are the lowest.
考虑了二次梯度项影响的非线性径向流动问题的无限大地层和有界地层渗流模型。
The models of the nonlinear radial flow for the infinite and finite reservoirs including a quadratic gradient term were presented.
通过对该泵内部流动速度、压力分布与捕捉到的流动冲击、二次流、回流等重要现象的分析，给该泵的性能改善与改进提供可靠的信息。
Useful information for the performance improvement was got from the distribution of inner flow velocity and pressure, flows impact, secondary flow and recirculation in the helix centrifugal pump.
小径高比的叶片采用静叶片的正倾斜的方法能够有效地控制流道内部的径向二次流和叶栅顶部的分离流动；
The method of forward leaning stator blade, which can effectively control the radial second flow and the top separate flow, is applied to the design of the small diameter-height ratio blade.
运用湍流理论和多相流动理论对不同二次风反切工况下炉内气流、煤粉颗粒运动进行了数值模拟。
The numerical simulation for furnace gas flow and coal powder particle motion under various conditions of reverse secondary air is carried out based on turbulent flow and multiphase flow theories.
空腔内的旋转流动常常涉及二次流、旋涡破裂等复杂问题。
Rich complicated flow problems present in swirling flow inside container, secondary flows, vortex breakdown, to name a few.
根据蒸汽发生器二次侧工质的流动特点，将迁移时间分成四段计算，并重点提出了管束区汽相运动的速度分布计算模型。
According to the flow characters of secondary side fluid, the transit times divide into four sectors from tube sheet to the sensor on steam line.
存在壁面移动时，二次泄漏更容易发生，但间隙流动得到改善；
When the case is moving, the second leakage on the tip of splitter happens more easier, but the flow on the cascade tip is improved.
平行通道旋转流动换热问题中旋转产生的二次流使截面的速度和温度分布趋于均匀，从而换热得到强化。
In the parallel channel rotation problem, secondary flow will uniform the velocity and temperature profile and lead to heat transfer enhancement.
揭示了导叶内部回流、漩涡，以及出口流动滞止区、二次流等流动细节；
The details of the flow fields such as the backflow, vortex and secondary flow were revealed.
二维平行壁面剪切流动进入混沌的现象可用含二次非线性项的强迫振动方程来描述。
The bifurcation and chaotic process of two-dimensional parallel wall shear flows are described by the forced oscillation equation containing a square nonlinear term.
凸型间隙在叶片前缘引起了流动分离，凹型间隙存在一高速区，增加了二次流损失。
There are flow separations at the front blade of bulge tip clearance. The high speed area of groove tip clearance increases the secondary flow loss dramatically.
最后用方截面管流中有关二次流的实验结果对模型进行鉴定。 结果表明，给出的模型在槽道流动和方截面管流中都获得了满意的结果。
Then the normal Reynolds stresses in square duct flow are calculated using the new model and coefficient functions, the results are consistent with the experimental data.
采用平板模型的流动试验方法，研究了二次孔道封堵的最佳用量和最佳工艺。
This paper makes a study on the optimum plugging time and the optimum plugging site of secondary channel through the adoption of the flow experiment of place models.
计算获得了分离流、二次流和多尺度旋涡结构，表明SST模型能很好地预测尾水管内的湍流流动。
Finally, separation flow, secondary flow and multi-scale eddy structure are simulated, it indicates that SST model can give a good prediction of turbulence in the draft tube.
二次流是叶轮通道内流动损失的一个原因，对离心叶轮机械的性能产生不利的影响。
Consequently, secondary flow is generated by the combined effects of centrifugal and Coriolis forces and it may induce separation of the boundary layers.
二次流矢量图表明流量的改变影响了离心力和哥氏力在流动中的作用，导致在垂直于主流方向引起截然不同的二次涡旋流动。
The secondary velocity vector plots show that the migration of the secondary vortex across the main flow was influenced by flow rates which made the centrifugal and Coriolis force changing.
研究结果表明，吹风比对旋转状态下二次流的流动形态起着决定性作用。
The results show that the average blowing ratio plays a decisive role in the flow patterns.
利用二次开发后的FLUENT软件对沉积腔内金刚石膜上方的等离子体射流的流动和传热进行数值模拟。
The flowing and conducting heat of plasma jet over the diamond film were simulated by using the reprogramming software FLUENT.
利用二次开发后的FLUENT软件对沉积腔内金刚石膜上方的等离子体射流的流动和传热进行数值模拟。
The flowing and conducting heat of plasma jet over the diamond film were simulated by using the reprogramming software FLUENT.
应用推荐