摘要
船舶在运行时可能会遭遇复杂海况,产生较大的摇摆倾斜,为了避免船舶倾斜时柴油机出现搅油、空吸现象,保证润滑系统正常运行,在油底壳设计时应对可能出现的摇摆倾斜极端情况进行验证仿真。在此背景下,主要应用流体仿真软件Fluent对柴油机油底壳等相关部件中的机油流动情况进行数值模拟和仿真分析。在数值模拟过程中,共模拟目标柴油机在两种滑油液位下分别横摇和纵摇过程的机油流动情况,并以滑油液面在每种摇摆状态下的极限位置是否浸没吸油盘、是否与曲轴发生接触产生搅油现象为准则来评估油底壳吸油盘设计及布置的合理性以及油底壳中机油量的合理性,并根据模拟结果对不合理的布置和设计提出可行的优化方案。
Ships may encounter complicated sea conditions during operation,resulting in large sway and tilt.In order to avoid the phenomenon of diesel engine oil stirring and suction,and to ensure normal operation of the lubrication system,the oil pan should be designed to deal with possible sway and tilt perform verification and simulation in extreme cases.In this context,this paper mainly uses the fluid simulation software Fluent to perform numerical simulation and simulation analysis on the oil flow in the diesel engine oil pan and other related components.In the numerical simulation process,the simulation of the oil flow of the target diesel engine under the two oil levels in the roll and pitch processes is performed.The rationality of the design and layout of the oil suction pan and the rationality of the amount of oil in the oil pan are evaluated based on the criteria of whether the limit position of the oil level in each swing state is immersed in oil suction pan and whether it is in contact with crankshaft to produce oil stirring.According to the simulation results,feasible optimization schemes are put forward to improve unreasonable layout and design.
作者
黄晔晖
王正祎
李建
路勇
HUANG Yehui;WANG Zhengyi;LI Jian;LU Yong(The 711th Research Institute of China Shipbuilding Industry Corporation,Shanghai 201108,China;Energy and Power Engineering Institute,Harbin Engineering University,Harbin 150001,China)
出处
《应用科技》
CAS
2021年第1期81-87,共7页
Applied Science and Technology
基金
国家自然科学基金面上项目(51579050
51979059)。
关键词
柴油机
润滑系统
油底壳
吸油盘
空吸
数值计算
数值模拟
结构改进
diesel engine
lubrication system
oil pan
oil suction pan
air suction
numeral calculation
numerical simulation
structural improvement
