摘要
基于国际标准并参照国家计量规范,对螺旋桨桨帽鳍试验节能效果的影响因素进行详细分析,进而对其进行不确定度计算.首先,通过GUM(测量不确定度表示指南)方法对螺旋桨安装桨帽鳍前后水动力性能试验各环节不确定度分量进行梳理,根据不确定度测量方程,确定了A类及B类不确定度对试验结果的影响;然后,对某油轮螺旋桨安装桨帽鳍前后的水动力性能进行30次重复性测试.结果表明:在95%包含概率下,推力的扩展不确定度不高于0.25%,扭矩的扩展不确定度不高于0.5%,螺旋桨效率的扩展不确定度不高于0.45%,本次试验不确定度能满足螺旋桨桨帽鳍试验的较高要求,并用蒙特卡罗法与GUM法计算结果进行了对比,两者较为符合,验证了GUM方法的适用性.
Based on international standards and referring to national metrological specifications,a detailed analysis was conducted on the factors affecting the energy-saving effect of propeller boss cap fin tests,and uncertainty calculations were conducted.First,the uncertainty components of each link in the hydrodynamic performance test before and after the propeller boss cap fin was installed by GUM(guide to the expression of uncertainty in measurement)method were sorted out.According to the uncertainty measurement equation,the impact of type A and type B uncertainty on the test results was determined.Then,30 times repeated tests were conducted on the hydrodynamic performance of a certain oil tanker propeller before and after the installation of the propeller cap fins.Experimental results show that under 95%inclusion probability,the expanded uncertainty of thrust is not higher than 0.25%,the expanded uncertainty of torque is not higher than 0.5%,and the expanded uncertainty of propeller efficiency is not higher than 0.45%.The uncertainty of this experiment can meet the higher requirements of the propeller cap fin test.The results obtained by Monte Carlo method and GUM method are compared,and they are in good agreement,verifying the applicability of the GUM method.
作者
孙硕
伍锐
刘恒
陈伟奇
SUN Shuo;WU Rui;LIU Heng;CHEN Weiqi(State Key Laboratory of Navigation and Safety Technology,Shanghai Ship and Shipping Research Institute Co.Ltd.,Shanghai 200135,China;Key Laboratory of Marine Technology Transportation Industry,Shanghai Ship and Shipping Research Institute Co.Ltd.,Shanghai 200135,China;Institute of Chemical Machinery,College of Energy Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2024年第4期106-112,共7页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
高技术船舶科研项目(工信部重装函[2020]307号).
关键词
桨帽鳍
GUM法
不确定度
蒙特卡罗法
水动力性能
propeller boss cap fin
GUM method
uncertainty
Monte Carlo method
hydrodynamic performance
