船舶艉管轴承润滑流场数值分析  

Numerical Simulation of Ship Aft Stern Tube Bearing Fluid Field

作　　者：周春良 刘占生[1] 刘顺隆[2] 

机构地区：[1]哈尔滨工业大学能源科学与工程学院,黑龙江哈尔滨150001 [2]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001

出　　处：《润滑与密封》2007年第2期145-149,共5页Lubrication Engineering

摘　　要：针对水润滑船舶艉管轴承建立了三维几何模型,对轴承内部流场进行了数值分析。分析了水润滑船舶艉管轴承内部流场的压力分布、温度分布、速度分布、湍流能量分布。计算结果表明,轴承内部周向凹槽可以减缓轴承轴向压力降低,轴向凹槽可以增强轴承内部冷却效果,使压力场均匀化,沟槽面可以使层流边界层区域增大,使转捩为湍流的雷诺数增大,降低轴承压力损失。在研究的10种轴承中,组合槽轴承没有出现负压区,空穴效应小,内部湍流能量下降最快,对船舶轴系的激振力最小,可以提高船舶轴系运行稳定性。Three dimensional geometry model was built based on the water lubricated ship aft tube bearing, the inner fluid field was simulated. The pressure distribution, temperature distribution, velocity distribution and turbulent energy in the water lubricated ship aft tube bearing were analyzed. The numerical results show that bearing inner circumferential groove can slow the pressure decrease,longitudinal groove can enforce the cooling effect and make the pressure field uniform. The groove surface can increase the laminar flowing fluid, increase the Renault coefficient of turning point to turbulent flow, decrease the pressure loss. Among the ten bearing bearing types, there is no negative pressure in the combined groove , so there is less cavity effect. The decline in the turbulent energy of combined groove bearing is the fastest ,excitation force to ship shafting system is the least, so it can increase the stability of the ship shafting system.

关 键 词：振动 水润滑轴承 内部流场 空穴效应 湍流能量 激振力 

分 类 号：U664.21[交通运输工程—船舶及航道工程]