各向同性湍流

各向同性湍流内颗粒碰撞率的直接模拟研究

Direct numerical simulation of inertial particle collisions in isotropic turbulence

颗粒对各向同性湍流中温度场的影响

Effect of particle on temperature field in isotropic turbulence

采用直接数值模拟方法，对具有平均标量梯度的被动标量场在稳定、均匀各向同性湍流中的统计特性进行了研究（计算Reλ为25和48，Pr数从0.3到4.0）。

The statistics qualities of passive scalar in homogeneous , isotropic and stationary turbulence with a mean scalar gradient are investigated via DNS ( Re λ 25 and 48 , Pr from 0.3 to 4.0 ) .

本文利用Karman-Howarth在各向同性湍流研究中提出的方法讨论了一类非线性等直梁在随机载荷作用下的弯曲振动，给出了一种用于结构动力响应分析的简单而衫的近似方法。

Through the method ever used by Karman-Howarth in research of the like turbulence in all direction , the thesis explores the flexural vibrations of a kind of non-linear straight beam under the random load , and presents a simple and practical approximate method adopted in structural dynamic response analysis .

均匀各向同性湍流平衡区的标量谱

Scalar spectrum in the equilibrium range of homogeneous and isotropic turbulence

均匀各向同性湍流内被动标量动力学特性的直接数值模拟研究

Direct Numerical Simulation the Dynamic Behavior of Passive Scalar in Isotropic Turbulence

均匀各向同性湍流的涡旋结构理论

On the Vorticity Structure Theory of Homogeneous Isotropic Turbulence

非等温气固两相各向同性湍流的直接数值模拟

Direct numerical simulation of non-isothermal gas-particle homogeneous isotropic turbulence

二维各向同性湍流的Sedov型解及其应用

Sedov-Type Solution to Two-Dimensional Isotropic Turbulence and Its Applications

均匀各向同性湍流的频率波数能量谱

Frequency - wavenumber energy spectra in isotropic turbulence

均匀各向同性湍流的衰减律

On the decay law of an isotropic turbulence

数值研究了二维各向同性湍流与弱激波相互干扰的问题。

The interaction between a two-dimensional isotropic turbulence and a weak shock wave was numerically studied .

对三维气粒两相各向同性湍流进行了直接数值模拟以研究悬浮在其中的颗粒的运动。

Direct numerical simulations were conducted to investigate the behavior of heavy particles in homogeneous isotropic turbulence .

对均匀各向同性湍流提出一个能谱密度的计算公式。

Formulae of energy spectrum density of large wavenumber range in homogeneous isotropic turbulence are given here .

结果表明，横向的湍流速度脉动比纵向有着更大的间歇性，这支持目前已有的一些关于均匀各向同性湍流的实验测量和数值计算的结果，而与另一些文献报道不同。

The results support some previous researches and show that the transversal velocity fluctuations are more intermittent than the longitudinal ones .

具有剪应力的自由湍流到下游相当远的地点由于能量的逐渐耗损将衰变成为类似均匀各向同性湍流的后期运动。

Due to the gradual energy decay the free turbulent shear flow far downstream resembles the final stage motion of homogeneous isotropic turbulence .

基于这种原理，本文计算了有限尺寸的固体颗粒在均匀各向同性湍流中的扩散。

Based on this understanding , the dispersion of a particle with finite size in a homogeneous isotropic turbulence is calculated in this study .

在单涡模型的基础上，根据各向同性湍流的能谱函数，考虑不同尺度的旋涡对气液传质的影响，建立了气液自由界面传质系数模型。

A model of mass transfer coefficients in liquid phase near free gas-liquid interface is developed based on the energy spectrum functions of isotropic turbulence .

还计算了横向脉动风速功率谱，并与基于各向同性湍流理论推导出的水平横向脉动风速谱进行了对比。

Finally , the lateral wind spectra are calculated , and the comparison to the spectrum derived from longitudinal wind spectrum based on isotropic turbulence theory is performed .

缓冲层的标度指数与线性标度律偏差很大，显示出较强的奇异性，对数层及外区标度指数逐渐接近均匀各向同性湍流的状态。

The scaling exponent in buffer layer extraordinarily deviates from the linear scaling law which shows intensive anomalous , whereas the scaling exponent in logarithmic region and outer region gradually approaches to the situation of homogeneous and isotropic turbulence .

随着法向位置靠近壁面，壁湍流惯性子区的波数范围向高波数区移动，能谱逐渐偏离均匀各向同性湍流的-5/3次幂。

When the measurement position is near to the wall , the inertial wave number range in wall turbulence shifts to the higher wavenumber and the spectrum gradually deviates from - 5 / 3 exponent power , which stands for the homogeneous and isotropic turbulence .

采用双流体模型和气液二相流体动力学理论建立了气升式环流反应器流体流动的数学模型，在此模型的基础上利用溶质渗透理论和各向同性湍流理论建立了局部液相体积传质系数数学模型。

A mathematical model of airlift-loop reactor ( ALR ) was developed with the two-fluid model and the ( kinetic ) theory of two-phase flow . The model for predicting the local liquid volumetric mass transfer coefficient was set up based on penetration theory and isotropic turbulence theory .

本文推出一个张量形式的输运系数计算公式，并用它分析均匀各向同性湍流、有应变率的均匀剪切流、管内流动和二维平面射流中的热通量问题，均获得了满意的结果。

In this paper a formula of the turbulent diffusivity tensor is derived , then the homogeneous isotropic turbulence , the homogeneous shear turbulence with a mean velocity gradient , the turbulent flux in a circle tube and in two-dimension plane jet are analysed and the results are satisfactory .

各向同性均匀湍流近壁结构及泥沙起动

Homogenous turbulence structure near the wall and sediment incipience

利用喷口上游网格产生的各向同性小尺度湍流影响剪切层并改善燃烧的被动控制方法在实际应用中简便易行，可能衍生出新的预混燃烧技术。

The passive control method , which influences the shear layer and improve combustion by the homogeneous turbulence generated by a grid upstream from the nozzle , is feasible in practice . New premixed combustion techniques may be derived from it .