本文研究了血浆层的存在对局部狭窄血管内脉动流动特性的影响。
This paper presents the influences of plasma layer on the oscillatory flow in arterial stenosis.
为了测量发动机进、排气管内气流的脉动流动特性，对自行设计的对气流起稳压作用的阻尼稳压箱进行了研究。
The effect of stabilizing pressure of a stable pressure box with damping line of the air flow is studied in order to measure the pulsate flow ability of air at the intake and exhaust pipes of engine.
详细分析了尾水管进口截面的压力脉动的幅值和相位，并对尾水管内的流动做了分析。
Amplitude and phase of pressure fluctuation at the inlet of draft tube as well as the inner flow in draft tube are analyzed in detail.
流体传输管道内的压力脉动反映了流体动态流动的基本特性。
The pressure surge in fluid transmission pipeline is one of the basic characteristics of fluid dynamic flow.
在大压比、大升程条件下，喉部各测点的脉动压力不大，流动稳定。
The result shows that in big pressure ratio and valve open conditions, gas fluctuation in valve seat throat is small and flow is steady.
在毛细滞后阻力方面，改进了所建立的高功率脉动热管的模型，进一步研究了脉动热管的流动和传热特性。
On the resistance of capillary hysteresis, the model of high power pulsating heat pipe is improved and the flow and heat transfer are further studied.
研究显示，前缘分离涡破裂后，流动的非定常脉动特性非常明显，这种非定常效应对机翼气动弹性特性的影响不可忽略。
It is shown that the unsteady fluctuation characteristics of the flow become highly obvious after the vortex breakdown, which exert a significant impact on the aeroelastic characteristics of the wing.
从瞬时速度、脉动速度和平均速度分布等方面对湍流流动进行了分析。
Based on the distribution of instant velocity, fluctuating velocity and average velocity, the flow status of turbulent flow is analyzed.
本文通过尾水管内流动的模拟，导出了由尾水涡带所引起的周期性振动的振动频率和脉动压力的计算公式。
This paper gives the flow simulation of hydraulic turbine draft tubes. Then, the calculation formula of the frequency and force of vibration of the draft tube are derived.
设计状态转子出口流动阻塞、损失、高水平紊流脉动及噪声主要发生在叶尖通道中部、尾迹和叶根吸力面角区；
In design condition, the flow blockage, loss, turbulence and noise at the exit focus mainly in the tip mid-passage, wake and the corner between the hub and the suction surface;
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.
实验还观察到气体—颗粒两相流动的湍流强度会随粒径的减小而增加，而且其脉动速度的分布将会在壁面附近出现脉动和随机分布的特征。
Furthermore, regarding the distribution of pulsation speed the characteristics of pulsation and random distribution can be observed in the neighborhood of tube wall surfaces.
混流式水轮机在非设计工况点下运行时，尾水管内部的非定常流动是由死水域和螺旋涡带的动态行为引起的，尾水管上部的螺旋涡带旋转引起流动的基频脉动。
The unsteady flow in a draft tube of Francis turbine under the off-design operation is produced by the dynamic behavior of a helical vortex rope with the dead core.
本文考虑了血液的菲牛顿流动特性，对血液在动脉管系中的脉动流建立了准二维流动模型。
In this paper a quasi-two-dimensional model of pulse flow in arterial pipe system is established, and non-Newton characteristic of the blood is considered.
将气泡生成脉动能量与气泡模型进行比较，结果再次论证本文分析方法的可靠性，本文的研究工作为稠密气固两相流动的研究揭开了一个崭新的篇章。
At last, the energy of the bubble formation frequency band was compared with the bubble model which shows the reliability of the analysis methods mentioned above.
定量比较了流场不同断面的流向速度平均值、脉动强度、混合层的动量厚度及涡量厚度等流动量。
The DNS results are compared with the classic experimental results of Lasheras et al on the plane mixing layer.
定量比较了流场不同断面的流向速度平均值、脉动强度、混合层的动量厚度及涡量厚度等流动量。
The DNS results are compared with the classic experimental results of Lasheras et al on the plane mixing layer.
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