• 螺旋桨脉动速度计算结果试验结果吻合良好

    Agreement between the numerical results of reduced velocity around an open-water propeller and the measurements is satisfactory.

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  • 该文研究均匀轴向磁场脉动速度射流参数稳定性影响

    This paper studied the effects of uniform magnetic field on the parametric instability of jet with pulsating basic velocity.

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  • 瞬时速度脉动速度平均速度分布等方面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.

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  • 本文对流场、脉动速度颗粒浓度动能湍流强度分布讨论。

    Distribution of flow vector, fluctuating velocity, turbulent kinetic energy, turbulent intensity and particle concentration were discussed.

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  • 串列尾迹平均速度和紊流脉动速度沿额线方向比单列变化平缓。

    The mean wake velocity profiles behind tandem cascades satisfy the self-similarity, similar to that behind the single-row cascade.

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  • 串列尾迹平均速度紊流脉动速度沿线方向单列变化平缓

    Behind the tandem cascades, the variations of mean velocity and turbulence intensity along the tangential direction become more gentle than that behind the single-row cascade.

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  • 结果表明由于沙粒脉动速度影响,沙粒的轨迹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.

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  • 颗粒运动PDF(概率密度分布函数)输运方程出发建立颗粒质量动量脉动速度方程。

    Equations of mass, momentum and second moments for particulate phase are derived from a particle PDF (probability distribution function) equation in dilute turbulent sediment-laden flows.

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  • 给出雷诺应力脉动动能脉动速度均方根雷诺数变化规律,其中雷诺应力、脉动动能给出了定量公式

    Meanwhile, a rule of Reynolds stress, energy of velocity fluctuations and RMS velocity with different Reynolds number is presented along with quantitative formula.

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  • 相位多普勒颗粒测速仪PDPA测量了颗粒平均脉动速度研究壁面粗糙度水平台阶气粒两相流动影响

    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.

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  • 实验还观察到气体—颗粒两相流动湍流强度随粒径的减小而增加,而且脉动速度分布壁面附近出现脉动随机分布的特征

    Furthermore, regarding the distribution of pulsation speed the characteristics of pulsation and random distribution can be observed in the neighborhood of tube wall surfaces.

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  • 有时局部速度可能出现瞬时脉动

    Sometimes temporal fluctuation may take place in the local velocity.

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  • 最后,对脉动热管传热规律了初步分析,得出了传热性能关系以及运行速度管径,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.

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  • 研究射流初始速度颗粒平均粒径静态床层高度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.

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  • 通过描述沙粒向运动速度脉动分量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.

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  • 但是,无直流电动机运行中存在转矩脉动问题,实现更精确位置更高性能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.

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  • 本文叙述了电化学法测量原理,介绍了用半圆电极同时测量壁面湍流速度梯度脉动的方法测量结果。

    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.

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  • 流体轴向横向速度脉动之间关联明显抑制

    The correlation between the axial and transverse speed pulsation of the drag reducing fluid has been conspicuously suppressed.

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  • 海洋湍流速度脉动一维概率密度测量,把测量结果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.

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  • 讨论了局部平衡湍流标量脉动速度脉动相关

    The correlations between the scalar fluctuation and the velocity fluctuations for the local equilibrium turbulence are discussed.

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  • 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.

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  • 但是无刷直流电动机运行存在脉动问题,实现更精确位置更高性能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.

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  • 地球村时代来临,不仅改变了人与人之间互动模式,加速资讯传递的速度时代经济脉动

    The emerging global village will not only alter the interaction among people, but also accelerate the speed of information sharing and the economic movement.

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  • 通过水中爆炸水击波及其多次脉动观测分析了水击波及其多次脉动传播速度脉动周期频率能量分布等特性。

    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.

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  • 风洞水下航行体模型尾部壁面脉动压力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.

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  • 该文介绍了结合脉动相关测速同时在线测量煤粉粒径浓度速度技术和装置。

    This paper presents the on line measurement of size, concentration and velocity of pulverized coal with light fluctuation and correlation method.

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  • 结果表明,无论从微观结构,还是外在特征,挟水流速度脉动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.

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  • 仿真结果表明,离散滑模变结构控制技术有效地降低开关磁阻电机脉动,并且可以提高系统响应速度

    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.

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  • 颗粒受力分析沉降计算基础上,首先选取了沉降速度模型进而脉动干扰沉降理论初步探讨。

    With analysis of forces on particle and calculation of terminal velocities, terminal velocity models are selected, and then Pulse jamming settlement theory was discussed.

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  • 颗粒受力分析沉降计算基础上,首先选取了沉降速度模型进而脉动干扰沉降理论初步探讨。

    With analysis of forces on particle and calculation of terminal velocities, terminal velocity models are selected, and then Pulse jamming settlement theory was discussed.

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