横摇运动下U型管内流动与传热数值分析

Numerical Analysis of Flow and Heat Transfer in U-tube Under Rolling Motion

Department of Nuclear Science and Engineering, Naval University of Engineering, Wuhan 430033, China

摘要: 利用Fluent软件分析了横摇运动下U型管内湍流流体摩擦阻力系数f和努塞尔数Nu随时间的变化。计算结果表明：横摇运动下U型管内流体f和Nu随着时间周期性波动，波动周期与横摇周期相同，波动幅度随着横摇周期的减小和横摇振幅的增大而增大；f和Nu的平均值、最大值与横摇振幅和横摇角频率近似呈线性关系；横摇增大了U型管内流体流动阻力和传热系数；横摇对U型管内流体流动传热的影响与直管明显不同。
- 横摇 ,
- U型管 ,
- 流动 ,
- 传热
Abstract: The variations of frictional resistance coefficient f and Nu with time in the rolling motion were calculated with Fluent code. The calculating results show that the f and Nu in U-tube in rolling motion fluctuate periodically with time, the oscillating period is the same as the period of rolling motion, and the oscillating amplitude increases with the decrease of rolling period and the increase of rolling amplitude. The maximum and average values of the f and Nu are in direct ratio with the rolling amplitude and angular frequency approximately. The flow resistance and Nu are enhanced in the rolling motion. The effects of rolling motion on the flow and heat transfer in U-tube are significantly different from those in straight tubes.
- rolling ,
- U-tube ,
- flow ,
- heat transfer

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