叶片间距对船用滤清器技术经济性能的影响  

Effect of blade interval upon comprehensive Technical-economic performance of marine filters

作　　者：卜诗 杨正君 封亮 贾永 章斌 BU Shi;YANG Zhengjun;FENG Liang;JIA Yong;ZHANG Bin(School of Mechanical Engineering and Rail Transit,Changzhou University,Changzhou 213164,China;Jiangsu Key Laboratory of Green Process Equipment,Changzhou 213164,China;Wuxi Baohong Environmental Marine Company,Wuxi 201203,China)

机构地区：[1]常州大学机械与轨道交通学院,江苏常州213164 [2]江苏省绿色过程装备重点实验室,江苏常州213164 [3]无锡宝宏环保船舶有限公司,江苏无锡201203

出　　处：《舰船科学技术》2022年第23期49-53,共5页Ship Science and Technology

基　　金：江苏省绿色过程装备重点实验室开放课题(GPE202005);无锡宝宏环保船舶有限公司技术开发项目(KYH21020339)。

摘　　要：用计算流体力学方法对船用滤清器进行两相流数值模拟,在进气流速1~7 m/s、雾滴粒径1~50μm范围内,分析叶片间距(22~30 mm)对滤清器阻力特性、分离效率的影响规律。结果表明,叶片间距减小,阻力增大、分离效率提高。角涡和分离涡是影响阻力变化的主要原因,弯头区惯性效应和湍流扩散是影响分离效率的主要原因。定义滤清器技术经济性能因子,分析表明,阻力经济性能因子和效率经济性能因子随叶片间距呈非单调变化,其中阻力经济性能在26 mm间距取得最佳,效率经济性能在30 mm间距取得最佳。综合技术经济性能因子随叶片间距扩大而提高并趋缓,流速越大,不同叶片间距的综合技术经济性能差异越显著。Numerical simulation is conducted to investigate the two-phase flow in the marine filters using CFD. Effect of blade interval upon pressure drop and separation efficiency is analyzed within inlet flow velocity of 1~7 m/s and droplets′diameter of 1~50 μm. The results indicated that, the pressure drop increases and efficiency improves with expending interval.The corner vortex and the separation vortex is responsible for pressure loss variation. The inertial effect and the turbulence dispersion in the bend account for the changing efficiency. Technical-economic performance factors are defined, the analysis implied that, the pressure-economic and the efficiency-economic performance factors show non-monotonic variation with interval, the best pressure-economic and the best efficiency-economic performances can be obtained at the interval of 26mm and 30mm, respectively. The comprehensive technical-economical performance factor improves and slows down with expending interval. Higher flow velocity yields more remarkable difference between different interval. The research can provide a guideline for the optimal design of marine filters.

关 键 词：滤清器 两相流 阻力特性 分离效率 技术经济性能 

分 类 号：U664.57[交通运输工程—船舶及航道工程]