涡轮阻尼器阻尼特性与轴向力特性分析  

Analysis of damp and axial force characteristics of turbine damper

作　　者：刘承江 欧阳斌[1] 马名中[1] 张成亮 Liu Chengjiang;Ouyang Bin;Ma Mingzhong;Zhang Chengliang(National Key Laboratory of Science and Technology on Vessel Integrated Power System Technology, Naval University of Engineering, Wuhan 430033, Chin)

机构地区：[1]海军工程大学舰船综合电力技术国防科技重点实验室

出　　处：《华中科技大学学报（自然科学版）》2018年第4期41-45,共5页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：海军“十二五”预研项目(2014A039);中国博士后科学基金资助项目(2016M592918);国家自然科学基金资助项目(51209212)

摘　　要：采用基于分离涡模型的计算流体力学方法计算某可调阻尼式涡轮阻尼器多个挡位、多个转速工况的内部三维黏性流场,预报了其阻尼特性和轴向力特性.阻尼器内部紊乱的流动造成其转矩、轴向力等外特性参数波动较大,大挡位工况超过10%.阻尼系数随挡位的增大而增大,除小挡位外,预报误差在5%以内.随着挡位的增大,转子轴向力增大,调节挡板轴向力也呈增大趋势.定子轴向力是一个小量,其方向与调节挡板轴向力相同.腔内复杂的不对称流动造成各挡板块受力不均,但每块挡板的轴向力均呈周期性变化,平均值相差±2.5%以内.大挡位高转速工况产生较严重空化,而小挡位时空化较弱.Three dimensional viscous flow fields in a turbine damper with adjustable damp at several adjustable plate positions and rotation speeds were calculated by computational fluid dynamics method with detached eddy simulation model,and the damp and axial force characteristics of the turbine damper were predicted.The complicated flow in damper would cause fluctuant torque and axial force,which even exceed 10% with adjustable plate at far-side position.Damp coefficients of different plate positions increased with plate position increasing,and the prediction errors of torque coefficients were less than 5% except for minor plate position.Rotor axial force became larger as plate position increasing,and adjustor plate axial force changed with the similar trend.Stator axial force was a minor value,which had the same direction with adjustable plate.Complicated asymmetrical flow in the damper brought asymmetric force of every plate.Axial force of each plate changed periodically,and the difference of their average values was less than ±2.5%.At large plate position and high rotation speeds,there was strong cavitation affecting damper＇s dynamic performance,while there was hardly cavitation at small plate position.

关 键 词：涡轮阻尼器 可调阻尼 阻尼特性 轴向力 计算流体力学 分离涡模拟 

分 类 号：TH137[机械工程—机械制造及自动化]