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.
在相同叶轮出口速度下，叶片扩压器比无叶扩压器中气流速度下降迅速，叶轮出口处平均流场趋于均匀。
Under the same impeller outlet speed, the flow speed of blade diffuser is faster than the vaneless one. The average flow field at impeller outlet trends to uniform.
在计算区域的进口处给定均匀来流速度，在出口引入压力边界条件。
Uniform incoming fluid flowing velocity is set for entry of computation region and pressure boundary condition is inducted for outlet.
系统研究了喷嘴保护气流速度、喷嘴出口距零件表面距离、喷嘴移动速度和侧风速度对气体保护效果的影响。
The influence of gas velocity from nozzle, distance between parts and nozzle exit, moving velocity of nozzle and crosswind velocity were systematically investigated on shielding gas field.
实验发现外套出口和混合管之间夹层存在气流倒流现象，倒流平均速度随着主喷管流量和下洗气流速度增加而增加。
The averaged gas velocity of flowing backward between the exhausting duct and the mixture tube increases with the rise of the main nozzle flux and the downwash flow velocity.
研究表明，当喷嘴的圆柱段长度是喷嘴出口直径的2 5 ~ 3 0倍时，粒子的速度能达到水射流速度的95%。
The study showed that when length of circular column part is 2.5 ~ 3.0 times outlet diameter, abrasive particle velocity near to 95% velocity of water-jet.
当射流速度比较大时，喷管的缺陷如进口出口的毛刺和流道壁的粗糙度是诱发湍流使射流破断的主要原因。
The turbulence induced by the defects of nozzle, such as the burr at the inlet and outlet, and the roughness of the wall, is the main cause to decrease the length of intact jet.
同时，运用流体力学原理，对冷却管路系统进行了理论计算，得到了喷嘴出口处的水流速度以及作用于钢板表面的冲击压力。
The impact pressure on the surface of product and the flowing velocity were calculated by hydromechanics theory, and the calculatio.
同时，运用流体力学原理，对冷却管路系统进行了理论计算，得到了喷嘴出口处的水流速度以及作用于钢板表面的冲击压力。
The impact pressure on the surface of product and the flowing velocity were calculated by hydromechanics theory, and the calculatio.
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