摘要
[目的]为了提高水面舰船轴支架的抗空化能力,[方法]以前轴支架为研究对象,对比不同来流攻角的2种改进翼型与原始翼型的压力分布及抗空化能力,分析在不同流速和攻角时改进翼型的水动力性能。依据空化发生条件,预测上述3种翼型的起始空化航速,并按照计算结果对预测值予以验证。[结果]结果表明:在0°,5°和10°来流攻角,改-1翼型的水动力性能在原始翼型的基础上得到明显改善,起始空化航速大幅度提升;改-2翼型在0°和5°来流攻角时的抗空化能力虽有提升,但在10°来流攻角时,其抗空化性能却急剧下降;采用压力分布预测的起始空化航速与基于空化得到的计算结果比较接近,这说明在精度要求不是很高的情况下,采用此方法预测起始空化航速是可行的。[结论]该研究成果可为水面舰船减振降噪设计提供一种技术途径。
[Objectives]In order to improve the anti-cavitation performance of shaft strut on a surface ship,[Methods]we study the front strut,compare the pressure distribution and anti-cavitation performance of the improved hydrofoil with those of the original hydrofoil at different attack angles of incident flows,and analyze the hydrodynamic performance of the improved hydrofoil at different flow rates and attack angles.We also predict the initial cavitation speeds of three types of hydrofoil according to the cavitation conditions,and verify the predicted values according to the calculation results.[Results]The results show that the hydrodynamic performance and initial cavitation speed of the improved hydrofoil-1 have been significantly improved when compared with those of the original hydrofoil at the incident flow attack angles of 0°,5°and 10°;the improved hydrofoil-2 has better anti-cavitation performance at the attack angles of 0°and 5°,while worse anti-cavitation performance at 10°;the initial cavitation speed predicted according to the pressure distribution is relatively close to the results based on the cavitation,which shows that it is feasible to predict the initial cavitation speed by this method when the accuracy requirement is not high.[Conclusions]This provides a technical approach for vibration and noise reduction of a surface ship.
作者
张凯
叶金铭
王友乾
于安斌
ZHANG Kai;YE Jinming;WANG Youqian;YU Anbin(College of Naval Architecture and Ocean Engineering,Naval University of Engineering,Wuhan 430033,China;Naval Supervisor Office of Equipment Maintenance in Shanghai Area,Shanghai 200136,China)
出处
《中国舰船研究》
CSCD
北大核心
2018年第A01期43-49,74,共8页
Chinese Journal of Ship Research
基金
国家自然科学基金资助项目(51579243)
关键词
轴支架
空泡预测
翼型
压力分布
展弦比
减振降噪
操纵性
shaft strut
cavitation prediction
hydrofoil
pressure distribution
aspect ratio
vibration and noise reduction
maneuverability
