One technical difficulty is cavitation, where low pressure behind a turning blade causes air bubbles.
一个技术难题是气穴现象，一旦发生气穴现象，位于旋转螺旋桨叶后方的低压会产生气泡。
The influence of blade number, blade thickness, location of splitter blades and tip clearance on mass flow, pressure ratio and efficiency is showed.
讨论了改变叶片数目，增加叶片厚度，调整分流叶片周向位置以及增加间隙高度等对离心叶轮流量、压比和效率等总体性能的影响。
Experimental results show that the trajectory of particles with large mass will be close to the pressure surface of blade in the centrifugal impeller.
试验结果表明：质量大的颗粒，在离心泵叶轮中，其轨迹总是趋向叶片压力面。
The measurements show that the airfoil blade fan prevails over the plate one in the aspects of total pressure efficiency, stable operation range and high efficient operation range.
试验结果表明机翼型叶片在全压效率、稳定运行范围及高效运行范围比相应的板型叶片具有优越性；
Using resistance strain gage, dynamic pressure sensor, slip ring and tape recorder, the blade vibration strain and exit pressure signals of rotor blades are recorded and then processed.
利用电阻应变片、动态压力传感器、滑环式引电器和磁带记录仪等，录取叶片振动应变和动叶出口压力信号，然后回放磁带，做信号处理。
The cooling effectiveness of pressure side of blade was higher than suction side.
层板叶片压力面的冷效略高于吸力面。
The mind has to be still, and you have to maintain just the right amount of pressure constantly as you sharpen the blade.
心必须静止。磨刃时你还必须维持那股恰到好处的压力。
The experimental result shows that the normal pressure distribution on the surface of the model blade is a conicoid, the maximum of the normal pressure is in the middle of the model blade.
研究结果表明，法向压力在模型铲刀表面呈二次曲面分布，在模型铲刀的中部取得最大值。
A numerical method is presented for prediction of propeller performance and pressure distribution on blade surface according to lifting surface theory.
本文提供了一种根据升力面理论计算螺旋桨桨叶表面压力分布和螺旋桨性能的数值方法。
The water pressure is difficult to analyze because of the complex shape the blade takes. So many designers of pump simplify the blade as cantilever girder.
在校核叶片强度时，由于叶片形状是空间扭曲的，相当不规则，很难分析叶片表面的水压力，所以研究人员通常用把叶片简化成悬臂梁进行分析。
The high head produced by the impeller means high adverse pressure gradient within blade passage and because of this the flow often separates from the blade surfaces even at the design point.
低比转速泵的高扬程决定了叶片流道内逆压梯度比较高，这种压力分布使得水流易于在叶片表面脱流分离，这一现象甚至在泵的设计点也难以避免。
The unsteady pressure distribution on the propeller blade surface by the present program are in satisfactory agreement with experimental data.
桨叶表面非定常压力分布的计算结果与测试结果的比较表明，本文的预报结果令人满意。
The value of passive earth pressure on the foot blade of open caisson varied between the value of the earth pressure at rest and the limit value of passive earth pressure.
指出沉井刃脚所受的被动土压力介于静止土压力与被动土压力极限值之间。
It is proved that the profile loss can be decreased with the use of advanced blade through the comparison of loss coefficient of blade surface overall pressure.
通过叶片表面总压损失系数，证实了先进叶型在流动中可以降低叶型损失。
In the process of cutting force hedge process and pressure center has been calculated and analyzed, and hedge die size of the blade of calculations.
对冲裁过程中的工艺力以及压力中心进行了计算和分析，并对冲裁模的刃口尺寸进行的计算。
There is a pressure probe at a measurement location a distance L upstream of the blade row.
距叶栅上游长度为L处有一个压力探测器。
The way to improve total pressure efficiency by appropriate inclined cut of airfoil blade tip was studied.
分析了对后拖式机翼型叶片的叶尖进行适当切割，可以提高全压效率的原因。
With the thickness distribution of a blade and the pressure or velocity distribution on its suction specified, the blade contour and the flow field of cascades that satisfy the gi…
对于给定的叶片厚度分布和吸力面上的设计压力或速度分布，应用本文方法可求得满足设计要求的叶片几何形状和叶栅流场。
The blade tip crack of the high pressure turbine is repaired by using the laser welding, which can reduce effectively the repair cost and increase the economic effectiveness of the engine repair.
采用激光熔焊方法，修复了高压涡轮工作叶片叶尖裂纹，有效降低了发动机修理成本，提高了发动机修理的经济效益。
And the results showed that the performance of the diffuser with splitter blade was improved. The pressure recovery coefficient was (increased) and the aerodynamic loss coefficient was decreased.
同时比较了大小叶片设计方案与全为大叶片方案的性能，发现采用大小叶片可提高静压恢复系数，降低空气动力损失。
Effect of impeller of different blade profile on the highest pressure point, optimum operating point, shape of pressure curve and efficiency of the fan were analyzed.
分析了不同叶片型线叶轮对风机的最高压力点、最佳工况点、压力曲线形状及效率的影响，同时探讨了风机不同叶片型线的工程实用价值。
Because of relative movement of blade rows, the pressure distributions on the blade and the flow field in the cascade vary periodically.
由于叶排间的相互运动，使叶片表面压力和叶栅通道内的流场呈周期性地变化；
The thesis introduces the flow process of traditional technology of "t" type high-pressure blade and the reasons which effect the process period.
分析介绍了“T”型叶根高压动叶传统工艺方法的流程及影响生产加工周期的原因。
We can make a accurate prediction of the propeller's thrust, torque and the pressure distribution on the blade.
用面元法不仅可以准确地预报螺旋桨的推力和转矩，而且可以准确地预报螺旋桨表面的压力分布。
This paper sets the theoretical and numerical method predicting the unsteady pressure distribution on the propeller blade surface by using perturbation potential based on surface panel method.
本文建立了扰动速度势面元法预报螺旋桨表面非定常压力分布的理论和数值方法。
The unsteady surface pressure on stator blade of an axial compressor was measured by means of mounting micro-sensors on blades surface.
本文对一台单级轴流压气机静子叶片非定常表面压力进行了测量。
Doblhoff's "pressure-jet rotor" concept involved piping high-pressure air from a compressor out to the rotor-blade tips, where it was mixed with fuel and burned in combustors.
Doblhoff的“压力型喷气转子”的概念参与管道高压空气压缩机向转子叶片的提示，它是混合燃料和燃烧的燃烧室。
Doblhoff's "pressure-jet rotor" concept involved piping high-pressure air from a compressor out to the rotor-blade tips, where it was mixed with fuel and burned in combustors.
Doblhoff的“压力型喷气转子”的概念参与管道高压空气压缩机向转子叶片的提示，它是混合燃料和燃烧的燃烧室。
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