查询词典 instantaneous velocity

Formulations of the lift and the thrust are derived based on the three-dimensional unsteady vortex lattice method, and the effect on instantaneous shape velocity is analyzed.

推导了新的基于空间非定常涡格法的扑翼飞行器升力和推力的计算公式，然后分析了瞬时形状速度对它们的影响。

Particle Image Velocimetry is a technique of measuring instantaneous 2D and3D velocity fields growing rapidly in recent years.

粒子图像测速技术(Particle Image Velocimetry，PIV)是近年来发展很快的一种定量化的瞬时二维及三维流场速度场测量技术。

In this paper, an advanced measurement technique—particle image velocimetry was performed to obtain the instantaneous two-dimensional velocity distributions at some sections in the cyclone.

同时本文还使用计算流体力学软件—FLUENT提供的Reynolds应力模式对旋风分离器内的纯气相湍流场进行了数值模拟。

ABSTRACT Particle image velocimetry is emerging as a powerful measurement technique, which can give the instantaneous planar velocity...

PIV是一种非接触、无扰动、全流场光学测速系统，它能测量的瞬态平面上的速度并能在线观察流场情况。

The result shows that the dynamic yielding strength of metal is 1~1000 times higher than its static yielding strength during the course of high pressure high velocity and instantaneous plastic deformation.

这种塑性变形与常规压力加工咖轧制）过程中金属的塑性变形在形式和形状上相似。

The concentration and velocity distributions as well as the instantaneous drop of voltage and the cathode and anode electric current and their variations between exchange membrane are also investigated in fuel cell start-up and step-up process.

并探讨燃料电池启动与加速过程内之浓度场与速度场分布，以及在启动与加速之瞬间电压降与浓度、阴极与阳极之电流、与交换膜之间的影响。

An example of another type of anemometer in which the airstream displace s an indicator giving an instantaneous reading of velocity or flowrate is the rotameter.

另一类流速计的典型代表是转子流速计。这种仪器的工作原理是气流使一指针偏转，指示出瞬时速度值。

An example of another type of anemometer in which the airstream displaces an indicator giving an instantaneous reading of velocity or flowrate is the rotameter.

另一类流速计的典型代表是转子流速计。这种仪器的工作原理是气流使一指针偏转，指示出瞬时速度值。

Two mathematical models have been deduced in the case of dense-phase and light-phase conveying respectively. Combining the capacitance phase concentration sensor designed and the traditional Venturi flow meter, the powder velocity and instantaneous mass flowrate are obtained by measuring concentration and differential pressure signal.

本文最后提出了一种差压—浓度法测量气/固两相流瞬时质量流量的新方法，分别建立了稀相和浓相输送情况下的粉料速度和流量测量的数学模型，即将所研制的电容式相浓度传感器与传统的文丘里流量计相结合，通过测量浓度信号及差压信号，求得粉料的传送速度及其瞬时质量流量。

According to the moving characteristics of tracklayer, when the vehicle is on ramp and the ground's vertical pressure is linear, the calculating formulas of relationship between the deviation of the instantaneous steering center, the position of vehicle's gravity, steering radius, moving velocity, moving acceleration, and vehicle's orientation, were obtained by the theory and method of vector analysis in mathematics and mechanics.

摘要根据履带式车辆的运动特点，运用数力学中矢量分析理论和方法，推导了接地比压为线性分布时履带式车辆在斜坡上转向时，瞬时转向中心偏移量与车辆重心位置、转向半径、行进速度、加速度、车辆方位相互关系的计算公式。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。