轴向槽船舶艉管轴承内部流场数值仿真  

Numerical Simulation of Longitudinal Groove Ship Aft Stern Tube Bearing Fluid Field

作　　者：周春良 袁士勤 刘顺隆[1] 郑洪涛[1] 穆勇[1] 

机构地区：[1]哈尔滨工程大学动力与能源工程学院,黑龙江哈尔滨150001 [2]驻航天二院中心代表室,北京100083

出　　处：《润滑与密封》2006年第11期39-43,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,20槽轴承和4圆柱槽轴承内部没有出现空穴区,可以降低由空穴效应带来的振动和噪声。轴向凹槽可以增强轴承内部冷却效果,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。根据不同的船舶运行要求选择不同形式的艉管轴承,可以提高船舶轴系运行稳定性。Three dimensional geometry model based on the water lubricated ship aft stern tube bearing was buih, the inner fluid field was simulated. The pressure distribution, temperature distribution, velocity distribution and turbulent energy in the water lubricated ship aft stern tube bearing were analyzed. The simulation results show that the 20 longitudinal groove bearing has no cavity in their lubrication membrane, so it can decrease vibration and noise brought by cavity effect. Longitudinal groove can enforce the cooling effect and make the pressure field uniform. The groove surface can increase the laminar flowing fluid,increase the Rennault coefficient of turning point to turbulent flow. decrease the pressure loss. Choosing different ship aft stern tube bearing as the whole ship performance can increase the stability of the ship shafting system.

关 键 词：水润滑轴承 内部流场 空穴效应 

分 类 号：U664.21[交通运输工程—船舶及航道工程]