船用滑油冷却器运行性能分析及流致振动研究

发布时间：2018-05-04 14:28

  本文选题：滑油冷却器 + 蒸汽动力　； 参考：《船舶工程》2016年05期

【摘要】：为研究船用滑油冷却器流致振动和微振磨损问题,摸索滑油冷却器易发生振动破损的薄弱部位。建立滑油冷却器壳侧及管侧的三维计算模型,采用流固耦合计算方法计算滑油冷却器壳侧滑油和管侧冷却水的耦合压力场、耦合流速场及耦合温度场,获得压力、流速、温度等关键运行参数的分布规律。基于管壳式换热器流致振动的诱发机理,揭示与流致振动密切相关的壳侧流体流动能量分布规律。由于滑油横向冲刷换热管束,促使壳侧流体掺混剧烈,导致壳侧流体压力场和速度场剧烈脉动,温度场不均匀分布,壳侧对流传热系数呈先降低再快速升高变化的规律。根据滑油流动能量分布图谱,判定滑油冷却器进、出口区域的换热管束承受流致振动破损较为严重,其中进口区域换热管承受流致振动破损最严重。
[Abstract]:In order to study the problems of fluid-induced vibration and micro-vibration wear of marine oil coolers, the weak parts of oil coolers are found to be prone to vibration damage. A three-dimensional calculation model of the shell side and the tube side of the oil cooler is established. The coupled pressure field, the coupled velocity field and the coupled temperature field are calculated by using the fluid-solid coupling calculation method, and the pressure and velocity of flow are obtained. Distribution of key operating parameters such as temperature. Based on the induced mechanism of fluid-induced vibration in tube and shell heat exchangers, the energy distribution of fluid flow on the shell side is revealed, which is closely related to fluid-induced vibration. Due to the lateral erosion of the heat transfer tube bundle by the oil, the mixing of the shell side fluid is intense, which leads to the intense pulsation of the pressure field and velocity field of the shell side fluid, the uneven distribution of the temperature field, and the change of convection heat transfer coefficient of the shell side first and then increases rapidly. According to the energy distribution pattern of oil flow, it is determined that the vibration damage caused by flow is more serious in the heat transfer tube bundle in the inlet and outlet areas of the oil cooler, especially in the inlet region.
【作者单位】： 中国舰船研究设计中心;
【基金】：国家自然科学基金资助项目(51309063)
【分类号】：U664
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本文编号：1843317