摘要
目前,对于螺旋桨的性能预报主要针对正常工作状态,然而,螺旋桨事故和桨叶损伤在机损事故中很常见,所以有必要研究非正常工作状态时的螺旋桨性能。首先分析了螺旋桨锁定、桨叶折断后转动、桨叶折断后锁定三种状态下的水动力性能,其次分析了锁定状态下的尾流场及尾流场速度分布规律。最后基于workbench平台,分析了三种非正常工作状态下的桨叶应力,校核了桨叶的结构强度。研究结果表明:锁定状态下时,所受阻力大于推力,而且阻力随着进速的增加而增加。锁定状态和折断桨叶后继续工作时的桨叶变形均较小,工程上可以忽略。
Research of propeller hydrodynamic performance mainly bases on normal working condition,however,propeller accident and blades machine damage accident is common,thus,it is necessary to study the propeller performance under abnormal working condition.Firstly,the hydrodynamic performance of propeller in latching,latching after blades broken off,rotating after blades broken off conditions was analyed.Then,the velocity contours and path line law were also discussed.Finally,based on workbench,blades stress and deformation were analyzed.The study shows that when the propeller under latching conditions,drag is larger than the thrust and it increases while the advance coefficient increases.The deformation of blades is small which can be ignored in project.
出处
《科学技术与工程》
北大核心
2015年第1期116-119,共4页
Science Technology and Engineering
关键词
螺旋桨
非正常工作
水动力性能
桨叶应力
propeller
abnormal working condition
hydrodynamic performance
blades stress
