讨论了局部平衡湍流的标量脉动与速度脉动相关。
The correlations between the scalar fluctuation and the velocity fluctuations for the local equilibrium turbulence are discussed.
减阻流体的轴向和横向速度脉动之间的关联被明显抑制。
The correlation between the axial and transverse speed pulsation of the drag reducing fluid has been conspicuously suppressed.
在主流速度脉动能谱中，低频运动强度大于水流，而高频运动强度低于水流。
In the power spectrum of the streamwise velocity fluctuation, the power intensity at low frequencies was larger and the power intensity at high frequencies was smaller than that for water.
本文分析了用热线系统进行湍流测量中，温度脉动对速度脉动测量讯号的干扰。
In this paper, we have analysed the influence of temperature on the velocity signals when the hot-wire was used for measuring turbulence.
对海洋湍流速度脉动的一维概率密度作了测量，并把测量结果与高斯分布进行了比较。
One-dimensional probability densities for oceanic turbulent velocity fluctuations and comparison with the Gauss distribution are given.
结果表明，无论从微观结构，还是外在特征，挟沙水流速度脉动与浓度脉动之间存在着内在联系。
It has proved that the turbulence of the flow resulting in the sediment suspension and the fluctuation of the concentration of sediment.
通过对描述沙粒垂向运动速度脉动分量的随机微分方程的直接求解，获得了风沙流中沙粒运动的随机轨迹。
Stochastic sand trajectories in wind-blown sand were obtained by solving the differential equation which describes the vertical fluctuating velocity of sand grains.
实验测量了射流与圆柱尾流纵、横向的湍流速度脉动，计算了这两种方向的湍流速度结构函数的标度规律。
The scaling of the longitudinal and transverse velocity structure functions is studied experimentally for turbulent jet and cylindrical wake flow.
用这些公式和一台一维激光多普勒测速计，测量了方形管道中水流的二维湍流速度脉动的均方值和雷诺切应力。
Using these formulas and a 1-d LDA, mean square value of 2-d turbulent velocity fluctuation and Reynolds shear stress have been measured for water flow in a square duct.
试验还利用荧光粒子进行了阀隙流场测量，得到了层次清晰的抛物线状阀隙流速分布和阀隙区域的速度脉动分布。
With the results, the general features of the flow are analyzed and summarized from the perspectives of velocity profiles, vorticity distributions and trend charts of velocity.
有时，在局部速度中可能出现瞬时脉动。
Sometimes temporal fluctuation may take place in the local velocity.
最后，对脉动热管的传热规律作了初步分析，得出了传热性能与充液率的关系，以及运行速度与管径，充液率的关系。
Relationship of heat transfer rate and filling rate is obtained, as well as the relationship of velocity and inner diameter, filling rate.
研究了流化数、射流初始速度、颗粒平均粒径及静态床层高度对射流脉动特性的影响。
The effects of fluidization number, injection velocity, particle mean diameter and static bed height on jet fluctuation are discussed.
但是，无刷直流电动机运行中存在转矩脉动问题，对实现更精确的位置和更高性能的速度控制有极大影响。
But the BLDCM has the disadvantages of torque pulsation, which is in the way of achieving accurate position and speed of higher performance.
本文叙述了电化学法测量的原理，介绍了用一半圆电极对同时测量壁面上二维湍流速度梯度脉动的方法和测量结果。
This paper describes the principle of such a measurement, and a semicircular electrode pair is suggested for the measuring of the two dimensional fluctuations of velocity gradient on the wall.
该文研究了均匀轴向磁场对含脉动速度射流参数稳定性的影响。
This paper studied the effects of uniform magnetic field on the parametric instability of jet with pulsating basic velocity.
但是无刷直流电动机运行中存在转矩脉动问题，对实现更精确的位置和更高性能的速度控制有极大影响。
But it has the disadvantages of torque pulsation, it can't achieve accurate position and speed of higher performance.
地球村时代的来临，不仅改变了人与人之间的互动模式，更加速资讯传递的速度与时代经济的脉动。
The emerging global village will not only alter the interaction among people, but also accelerate the speed of information sharing and the economic movement.
通过水中爆炸水击波及其多次脉动的观测，分析了水击波及其多次脉动的传播速度、脉动周期、频率及能量分布等特性。
Through observation on shock wave and multiple pulsating caused by underwater blasting, the velocity, period, frequency and energy of shock wave and multiple pulsating are analysed.
在风洞中对水下航行体模型尾部壁面脉动压力与近壁湍动速度进行同步测试及处理分析。
The wall pressure fluctuations and near-wall turbulent flow were jointly measured at the stem of an underwater vehicle model in CSSRC Wind Tunnel.
该文介绍了结合光脉动法和相关测速法同时在线测量煤粉粒径、浓度和速度的技术和装置。
This paper presents the on line measurement of size, concentration and velocity of pulverized coal with light fluctuation and correlation method.
仿真结果表明，离散滑模变结构控制技术能有效地降低开关磁阻电机的转矩脉动，并且可以提高系统的响应速度。
Simulation on the torque and the speed of switched reluctance motor shows that the control technology can effectively reduce the torque ripple of the motor, while improving the system response speed.
在颗粒受力分析及沉降末速计算基础上，首先选取了沉降速度模型，进而对脉动干扰沉降理论做了初步探讨。
With analysis of forces on particle and calculation of terminal velocities, terminal velocity models are selected, and then Pulse jamming settlement theory was discussed.
结果表明，由于沙粒垂向脉动速度的影响，沙粒的轨迹与不考虑其垂向脉动速度的情形存在明显不同。
The results show that because of the effect of account of vertical fluctuating velocity, the trajectories of sand grain involving the effect are differ obviously from that not involving the effect.
对比渐开线齿轮泵，单圆弧齿轮泵的瞬时排量与齿轮角速度成正比，且稳定，无脉动。
Comparing with involute gear pump, the instant displacement is in direct proportion to the angular velocity of the gear and stable without pulsation.
敞水螺旋桨的脉动速度计算结果与试验结果吻合良好。
Agreement between the numerical results of reduced velocity around an open-water propeller and the measurements is satisfactory.
模拟结果表明脉动气流喷雾干燥具有干燥时间短，蒸发速度大等特点。
The simulation results show that the short drying time and large evaporation rate are characteristics of the pulsating spray drying.
此外，作物残茬、秸秆和牧草等粗糙元的高度、密度及直立性均对下垫面的空气动力学粗糙度、摩阻速度及风速脉动有一定影响。
In addition, the height, density and perpendicularity of remnant stubble, straws and grass had influence on aerodynamic roughness and wind velocity fluctuation on different underlying surfaces.
此外，作物残茬、秸秆和牧草等粗糙元的高度、密度及直立性均对下垫面的空气动力学粗糙度、摩阻速度及风速脉动有一定影响。
In addition, the height, density and perpendicularity of remnant stubble, straws and grass had influence on aerodynamic roughness and wind velocity fluctuation on different underlying surfaces.
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