| 1. | For the first time the complex separated flow in the aft - end zone was measured using pdpa technology . the whole mean and fluctuating flow field were obtained
利用pdpa测速技术首次对燃烧室尾部的复杂分离流动进行了测量，获得了完整的时均速度和湍流脉动定量数据。 |
| 2. | The influence of turbulence is seen as a new term in the equations . this term is the divergence of a second - order correlation tensor of the fluctuating parts of each velocity component
湍流脉动的影响作为一个新的附加项?雷诺应力，出现在rans方程中，它是扰动速度分量二阶关联张量的散度。 |
| 3. | Although being superior over the other methods in terms of physical realism , the rans methods , however , involve one major weakness - the effects of the turbulent motion of the mean flow are unknown and must be modeled
尽管求解雷诺平均ns方程( rans )是解决现代空气动力学问题物理上最可信的方法，但它也有一个缺点：平均流动中湍流脉动量的影响是未知的。 |
| 4. | 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。 |
| 5. | The numerical results show that the flow - field structures and main features of the compressible mixing layer including the distribution of mean velocity , turbulent fluctuation intensities , reynolds stress and growth rates agree well with experimental and other numerical results
计算出的流场结构和主要的流动特征包括平均速度、湍流脉动强度和雷诺应力的分布以及混合层扩张率都同实验测量和其他时间发展数值模拟结果符合得很好。 |
| 6. | Flow details of measurement indicate that the coupling of periodic separated flow ( such as low frequency swinging of separation line ) with nozzle flow may cause aft - end internal flow unsteady . recirculation flow gains more energy from the main flow , at the same time the turbulence intensity increases
通过对测量结果的分析，我们认为分离流动的周期性(如分离线的低频摆动)与喷管流动相耦合，会造成燃烧室尾部流动的非稳态效应增强，增加了回流区从主流中获得的能量，也加剧了流场的湍流脉动。 |
| 7. | Under the influence of the submergence the turbulence intensity are quite high at the end stage of burning . however , the turbulence intensity decreases obviously at the medium stage and the preliminary stage of burning because the flow disturbance is eliminated by the mixture of injection flow and main flow
受喷管潜入的影响，结束时刻流场的湍流脉动非常强烈，而中间时刻和初始时刻，由于加质流与主流的强迫混合可以消除气流扰动向下游的传播和扩展，流场的湍流脉动明显减弱。 |
