4.5.1 紊流运动的特征与时均法 紊流流动是极不规则的流动，这种不规则性主要体现在紊流脉动（turbulent fluctuation），所 谓紊流脉动，就是诸如速度、压强等空间点上的物理量随时间的变化作无规则的随机的变动。
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phenomenon of turbulent fluctuation 湍燎落现象
charge turbulent fluctuation 电荷扰动起伏
turbulent fluctuation pressure 湍流脉动压力
turbulent fluctuation variance 湍流脉动方差
Turbulent fluctuation intensity 湍流脉动强度
turbulent fluctuation of concentration 浓度脉动
turbulent density fluctuation 湍流密度脉动
In the results of eight 2D simulation cases with convective Mach number ranged from 0.2 to 1.0 the mean velocities and the thickness growth rates are in good agreement with experimental results, but the turbulent fluctuation intensities are larger.
对对流马赫数从0.2到1.0的混合层的二维数值研究表明，平均速度分布和扩张率与实验结果相符合，但湍流脉动强度偏大。
参考来源 - 应用BGK格式对可压缩混合层的数值研究·2,447,543篇论文数据，部分数据来源于NoteExpress
A numerical model for turbulent fluctuation and diffusion of gas-particle flows is presented.
本文提出了气固两相流动的湍流扩散数学模型。
The results show that, the influences of turbulent fluctuation on time-averaged infrared signal in different wave band are different.
分析结果表明，在不同的探测波长上，湍流脉动引起的时均辐射信号变化不同；
Based on turbulent kinetic energy and the rate of turbulent dissipation transport equations, the equation to calculate variance of the refractivity fluctuation is modeled.
根据湍流的动能和动能耗散率输运方程，建立了折射率起伏方差的计算模型。
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