圆管流转捩过程中交替系数及紊动强度分布的实验研究  

Experimental Study of Intermittent Factor and Turbulent Intensity Distributions in Transition to Turbulence in Pipe Flow

作　　者：郑永刚[1] 唐永洁 方铎[1] 

机构地区：[1]四川联合大学水利系,西南石油学院石油工程系

出　　处：《水动力学研究与进展（A辑）》1995年第3期344-349,共6页Chinese Journal of Hydrodynamics

摘　　要：运用四川联合大学高速水力学国家重点实验室所属的丹麦ＤＡＮＴＥＣ公司生产的二维激光光纤测速及动态粒子分析系统，测量了圆管流转过程中的速度分布，所测雷诺数范围为２０００～３７５０。文中分析了圆管流转过程中，交替系数与紊动强度随雷诺数的变化规律及圆管内紊动强度随径向位置的变化规律。Using 2 - D Laser Fiber Velocimeter & Dynamic Particle Analysis System produced by DANTEC Corp.,Denmark, of State Key Hydraulics Lab. of High Speed Flows, Sichuan Union University, we have measured the velocity distributions in transition to turbulence in pipe flow, the range of Reynolds numbers for measurement is from 2000 to 3750.The variation laws of intermittent factor and turbulent intensity with Reynolds number in transition to turbulence in pipe flow and the variation laws of turbulent intensity with the position at the radial in pipe have been analysed in this paper.

关 键 词：圆管流动 交替系数 转捩 管流水力学 湍流 

分 类 号：TV134[水利工程—水力学及河流动力学]