结果表明，切向速度分布由于壁面粗糙度的影响而偏离模型情况；
It is shown that the tangential velocity distribution in actual combustor differs from that in model com- busior by its wall roughness.
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.
最后对壁面粗糙度降低旋风分离器压力损失和分离效率的机理进行了分析。
Finally, the mechanisms of reduction in pressure loss and separation efficiency of the cyclone separator caused by the wall roughness are discussed.
试验分析认为，水流流态，壁面粗糙度和壁面曲率对边界层特性有明显的影响。
Analytical results show that the now pattern, wall roughness and wall curvature have obviously effect on the boundary layer hydraulic characteristics.
在试验的基础上，研究了瓦斯爆炸过程中壁面粗糙度对火焰传播速度和超压的影响。
On the basis of experiment, the influence of wall roughness on fire transmission and overpressure in gas explosion was investigated.
实验结果表明当壁面粗糙度超过1%时摩擦系数随着壁面相对粗糙度的增加而增加。
The friction factor obtained from the experiments increases with the surface roughness increase when the relative roughness is greater 1%.
在试验的基础上，研究了瓦斯爆炸过程中壁面粗糙度对火焰传播速度和超压的影响。
On the basis of the experimental research, the significant influence of the wall roughness on the flame transmission law of the gas explosion was analyzed.
研究结果表明：静子和转子壁面粗糙度对大间隙环流中偏心转子动特性系数有较大影响。
The effects of stator and rotor wall roughness on the dynamic coefficients of the eccentric rotor in large gap annular flow have been investigated with numerical method.
在模拟中构造了不同的壁面粗糙度，得到了面向热导率随着壁面粗糙度增加而减小的结果。
The result shows that with the increase of interface roughness the in plane thermal conductivity decreases.
在模拟中构造了不同的壁面粗糙度，得到了面向热导率随着壁面粗糙度增加而减小的结果。
The result shows that with the increase of interface roughness the in plane thermal conductivity decreases. It is because that when the interf…
壁面粗糙度对流场中不同位置处颗粒运动影响的强弱不同，其中逆流区处较弱，下游处较强。
The effect of roughness on particle motion in the recirculation zone is weaker than that in the fully developed flow region.
研究还发现，水泵出口断面轴向流速分布均匀度和速度加权平均偏流角也随壁面粗糙度改变而改变。
It is also discovered that the axial velocity distribution and velocity-weighted average swirl Angle at the outlet section of axial-flow pump vary with the changing of wall roughness.
研究结果表明，壁面粗糙度对瓦斯爆炸过程的影响很大，相比光滑管道，粗糙管的火焰速度大幅度提高；
The research result shows that the wall roughness has great effects on flame transmission in gas explosion.
脉动热管的优化设计可以通过对壁面粗糙度的加工、形成的汽泡尺度的控制和工质的匹配选择等来实现。
Some methods of optimization on pulsating heat pipe are by the designs of capillary wall microrelief, the scale design of existed vapor bubbles and the working fluid selection.
脉动热管的优化设计可以通过对壁面粗糙度的加工、形成的汽泡尺度的控制和工质的匹配选择等来实现。
The shape of the existed vapor bubbles influences the startup and operation of pulsating heat pipe essentially, the new vapor bubbles are easier to produce near the smaller vapor bubbles.
用相位多普勒颗粒测速仪（PDPA）测量了颗粒的平均与脉动速度，研究了壁面粗糙度对水平后台阶气粒两相流动的影响。
The effect of wall roughness on gas-particle flows in a horizontal backward-facing step is studied using a phase-Doppler particle anemometer (PDPA) by measuring the mean and RMS particle velocities.
在烧蚀滞后滚转力矩的计算方法中，本文主要介绍滞后引射率和粗糙度对壁面摩擦系数联合影响的一种快速计算方法。
In the calculations of roll torque of ablation lag, a rapid method for calculating combined influence of ablation injection and roughness on skin friction coefficient is mainly described.
对于不同粗糙程度的壁面，在同一流量条件下的糙率系数会随着相对粗糙度的增大而增大。
The roughness coefficient increases when the relative roughness of the surface becomes larger under the same condition of discharge.
对于不同粗糙程度的壁面，在同一流量条件下的糙率系数会随着相对粗糙度的增大而增大。
The roughness coefficient increases when the relative roughness of the surface becomes larger under the same condition of discharge.
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