摘要
本文以拉格朗日方式研究叶轮机内动、静叶间的相互作用，通过直接跟踪流体涡团的时间历程，来描述流体的非定常流动过程。发展了代数湍流模型（Ｂａｌｄｗｉｎ－Ｌｏｍａｘ湍流模型）在尾迹中的应用方法，克服了其它数值方法中无法准确捕捉尾迹中心线的运动轨迹，以及计算出的边界层外的湍流涡粘性系数偏大的缺陷。用该方法对叶轮机内转子／静子相互作用过程进行了数值模拟，与实验的对照表明，该方法是可信的。数值结果还表明，采用该模型能正确地模拟出叶轮机内尾迹和各种旋涡等非定常因素的流动过程，从而为研究叶轮机内非定常流动及掺混过程提供了一个新途径。
The Lagrangian vortex method is applied to direct description of the unsteady flow due to rotor-stator interaction in turbomachinery by tracing the trajectory of vortices.The Baldwin-Lomax turbulence model adapted for wakes overcomes the short comes of other numerical methods,that they cannot continuously monitor the moving wake centerlines and give the computed viscosity in the outer region much higher than in the boundary regions.The agreement between the computational and experimental results is generally good,which shows that the present method is feasible.The result also show that the development of wakes and other vortices can be correctly predicted with the help of the presented turbulence model.So this method can be used as a new tool for analyzing unsteady flow and complicated phenomena in turbomachinery.
出处
《航空动力学报》
EI
CAS
CSCD
北大核心
1998年第2期123-127,共5页
Journal of Aerospace Power
