【作者】 王畅； 高璞珍；

【Author】 WANG Chang,GAO Pu-zhen (College of Nuclear Science and Technology,Harbin Engineering University,Harbin of Heilongjiang Prov.150001,China)

【机构】 哈尔滨工程大学核科学与技术学院；

【摘要】 对圆管内流量周期性变化时的阻力特性进行了实验研究,并通过特征线法对与实验相同流动条件时的流动特性进行数值计算,数值解与实验值符合较好,流量波动时阻力变化与流量变化具有相同的周期,但是流量的变化相对于压降变化存在一个相位差,且在层流时的相位差明显大于紊流时。更多还原

【Abstract】 This paper shows experiment research for flow characyeristics under flow fluctuation periodicly,and the case that single-phase water flows adiabatically in a round channel with flow rate fluctuating is numerically simulated based on method of characteristic(MOC),The simulation results are compared with theoretical values and experimental results.It is shown that when the flow rate fluctuates in sine law with time,the pressure drop fluctuates with the same period,but there is a phase lag between the two.The numerical results of pressure drop curve in laminar condition accords well with theoretical analysis result;but the phase lag and pressure drop values in laminar flow differ from experimental values.Preliminary analysis is given to the difference.更多还原