利用实测的脉动场与平均场同步梯度观测资料研究近地层相似理论的适用性。
The applicability of the similarity theory in the surface layer is studied by using the gradient observations of fluctuation and mean fields.
本文的研究重点包括车身表面脉动压力的求解和分析、车外远场噪声和车内噪声的预估以及实车道路试验研究。
This study focused on analysis of pressure fluctuation on the body surface, prediction of exterior far-field noise and interior noise and the road tests.
本文应用谱分析理论研究了剪切湍流场中的压力脉动，包括功率谱、均方值等。
The pressure fluctuations in turbulent shear flows are investigated with the theory of spectral analysis.
对正常肺动脉及肺动脉闭锁并各种心外管道重建RVOT模型的脉动流场进行定性和定量研究。
Both qualitative and quantitative pulsatile studies were employed on models of normal pulmonary and pulmonary artery atresia with RVOT reconstruction using various extracardiac conduits.
用铂膜电阻温度计测量了前向台阶诱导激波与湍流边界层相互作用流场中的表面热流率脉动。
Wall heat transfer fluctuations have been measured using a platinum film resistance thermometer in forward facing steps induced shock wave and turbulent boundary layer interaction fields.
发现共混物的相容性与正弦脉动流场的频率、振幅呈现一定的响应规律。
It was found that the blending system's compatibility responded to the sine pulsating flow field's frequency and vibration amplitude with certain regulation.
通过对气泡在流场中的运动和受力分析，给出了用以封闭模型的粘性应力、脉动应力、相间动量交换项的表达式。
Analysis of bubble motion in the flow field was used to develop relations for the viscous stresses, turbulent stresses, and interfacial momentum exchange to close the model.
针对脉动喷嘴的结构对形成脉冲流体的机理进行了电路模拟分析，从而避开了直接对流体流场的计算及边界条件的处理。
The pulse fluid mechanism is analyzed with circuit simulation on the basis of the structure of pulse nozzle. which will directly avoid calculating the fluid yard and treating the boundary conditions.
采用快速傅立叶变换法（FFT）编制了风荷载模拟程序，实现了随机风场的计算机仿真，仿真得到了16维脉动风荷载时程样本。
Using FFT to workout a wind load simulation program. The computer simulation of the stochastic wind field is achieved. The 16-dimensional random process is got.
从简化的颗粒运动方程出发，分析了在剪切流场中颗粒脉动强度和流体脉动强度之间的关系。
The relationship between turbulent intensity of particles and those of the carrier fluid was studied theoretically based on simplified particle motion equation.
本文对流场、脉动速度、颗粒浓度、湍动能、湍流强度等的分布做了讨论。
Distribution of flow vector, fluctuating velocity, turbulent kinetic energy, turbulent intensity and particle concentration were discussed.
基于测试的气动参数和模拟的脉动风速场，给出了车辆和桥梁静风力、抖振力及自激力的时域表达式。
Based measured aerodynamic parameter and simulated wind speed field, time-domain expression of static wind load, buffeting load and self-excited load for bridge and vehicle are introduced.
根据山地风场中特有的平均和脉动风速特性，研究高层建筑平均风荷载、背景和共振等效风荷载特性。
According to the particular profile of mean and fluctuating wind speed in hilly terrain wind field, mean, background and resonant wind loads of tall buildings are investigated.
结果表明，瞬态浓度场具有低维混沌特征，其脉动信息熵时间序列也是混沌的。
The results are demonstrated to show that the instantaneous concentrations have low-dimensional chaos characteristics, and the information entropies are also chaos.
随机脉动风场的模拟是大跨度桥梁颤抖振时域分析的前提。
Simulation of stochastic wind velocity field is prerequisite to flutter or buffeting analysis of long-span bridges in time-domain.
主要研究气动喷嘴出口气流紊流脉动对喷雾浓度场及燃烧状态温度场的影响。
The effects of turbulence intensity on liquid spray distribution and temperature profile behind airblast atomizer have been investigated.
通过对气泡在流场中的运动和受力分析，给出了用以封闭模型的粘性应力、脉动应力、相间动量交换项的表达式。
Analysis of bubble motion in the flow field was used to develop relations for the viscous stresses, turbulent stresses, and interfacial momentum exchange to close...
风场模拟涉及的风参数主要包括脉动风谱和空间相关函数，对风洞中的风场参数进行了实测拟合并应用于风场模拟当中。
Wind field parameters involved in wind field simulation include mainly turbulent wind power spectrum density and spatial-correlation function, which is measured and applied to wind simulation.
最后，对成桥运营阶段确定了颤振、驰振临界风速以此来做为稳定性的判断依据，并重点进行脉动风场的抖振响应分析。
Finally, to determine the bridge flutter, galloping and buffeting critical wind speed as a method of judging the stability, buffeting response analysis is the key point.
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.
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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