基于面元法的扭曲舵片空泡数值预报研究
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摘要
为了比较分析扭曲舵和普通舵的空泡性能,首先采用面元法得到螺旋桨尾流场,以此作为舵的来流输入条件;然后,通过基于速度势的面元法对舵上的片空泡进行计算,得到舵片泡的范围和厚度分布,并对两种舵在不同航速不同舵角的片空化形状进行了计算比较。结果表明:扭曲舵可以明显提高舰船舵的无空化航速,且在一定航速下可提高舵的无空化舵角范围;发生空化时,扭曲舵的空化范围比普通舵明显小。
In an effort to analyze the cavitation performance of twisted rudder and traditional rudder, a surface-panel method calculating cavitation of rudder behind propeller is established. The wake field of propeller is calculated based on surface-panel method, which is used as inflow condition for rudder cavitation. The cavitation shape including range and thickness on the rudder is calculated by the surface-panel method based on velocity potential. The cavitation shape on the twisted rudder and traditional rudder of a ship is calculated and compared with each other. It is shown that the twisted rudder can raise the speed of cavitation inception and the rudder angle in the condition of non-cavitation. At the same rudder and the same speed, the cavity range on the twisted rudder is much smaller than that on traditional rudder.
In an effort to analyze the cavitation performance of twisted rudder and traditional rudder, a surface-panel method calculating cavitation of rudder behind propeller is established. The wake field of propeller is calculated based on surface-panel method, which is used as inflow condition for rudder cavitation. The cavitation shape including range and thickness on the rudder is calculated by the surface-panel method based on velocity potential. The cavitation shape on the twisted rudder and traditional rudder of a ship is calculated and compared with each other. It is shown that the twisted rudder can raise the speed of cavitation inception and the rudder angle in the condition of non-cavitation. At the same rudder and the same speed, the cavity range on the twisted rudder is much smaller than that on traditional rudder.
引文
[1] 董国祥.助推节能扭曲舵性能的理论预报 [J].船舶,1994(6):58-63.DONG Guo-xiang.Theoretical prediction of boosting energy-saving twisted rudder [J].Ship & Boat,1994(6):58-63.(in Chinese)
[2] 徐一军.扭曲反应舵节能功效的可行性探讨 [J].船舶设计通讯,2010,125(S2):21-24.XU Yi-jun.Feasibility discussion on energy saving efficiency of twisted rudder [J].Journal of Ship Design,2010,125(S2):21-24.(in Chinese)
[3] WANG Chao,HE Miao,WANG Guo-liang,et al.Design and performance analysis of twisted rudder based on the maximum reduction of rudder resis-tance [J].Journal of Ship Mechanics,2014,18(3):238-247.
[4] 齐博慧.扭曲舵水动力性能研究 [D].哈尔滨:哈尔滨工程大学,2010.
[5] 刘登成,黄国富.高效扭曲舵水动力特性数值分析 [C]//第十一届全国水动力学学术会议.无锡:中国造船工程学会,2011.
[6] SHEN Y T,JIANG C W,REMMERS K D.A twisted rudder for reduced cavitation [J].Journal of Ship Research,1997,41(4):260-272.
[7] 邓鸿,赵成璧.大型高速客货船的舵空泡剥蚀及解决方案探索 [J].船舶设计通讯,2005(1):65-69.DENG Hong,ZHAO Cheng-bi.Rudder cavitation and solution search for large fast passenger ferry [J].Journal of Ship Designs,2005(1):65-69.(in Chinese)
[8] 叶金铭,王威,李渊.抗空化扭曲舵设计及力学特性研究 [C]// 2015全国船舶水动力学会议论文集.哈尔滨:中国造船工程学会船舶力学学术委员会,2015.
[9] 叶金铭,王威,张凯奇,等.扭曲舵空化起始航速分析 [J].哈尔滨工程大学学报,2016,37(12):1631-1637.YE Jin-ming,WANG Wei,ZHANG Kai-qi,et al.Analysis on the cavitation inception speed of twisted rudder [J].Journal of Harbin Engineering University,2016,37(12):1631-1637.(in Chinese)
[10] KOOP A H,HOEIJMAKERS H W,SCHNERR G H,et al.Design of twisted cavitation hydrofoil using a barotropic flow method [C]// Six International Symposium on Cavitation.Wageningen,The Netherlands:CAV,2006.
[11] PERSSON T,BARK G,BENSOW R.Large eddy simulation of the cavitating flow around a wing [C]// Int.Symposium on cavitation,Wageningen,The Netherlands:CAV,2016.
[12] ACHKINADZE A S,BERG A,KRASILNIKOV V I,et al.Numerical prediction of cavitation on propeller lades and rudder using the velocity based source panel method with modified trailing edge [C]// Proceedings of the International Summer Scientific School "High Speed Hydrodynamics".Cheboksary,Russia:s.n.,2002.
[13] VLADIMIR I K,AAGE B,IVAR J.Numerical prediction of sheet cavitation on rudder and podded propellers using potential and viscous flow solutions [C]// Five International Symposium on Ca-vitation.Osaka,Japan:s.n.2003.
[14] KERWIN J,LEE C.Prediction of steady and unsteady marine propeller performance by numerical lifting-surface theory [J].Thrans.SNAME,1978,86:218-253.
[2] 徐一军.扭曲反应舵节能功效的可行性探讨 [J].船舶设计通讯,2010,125(S2):21-24.XU Yi-jun.Feasibility discussion on energy saving efficiency of twisted rudder [J].Journal of Ship Design,2010,125(S2):21-24.(in Chinese)
[3] WANG Chao,HE Miao,WANG Guo-liang,et al.Design and performance analysis of twisted rudder based on the maximum reduction of rudder resis-tance [J].Journal of Ship Mechanics,2014,18(3):238-247.
[4] 齐博慧.扭曲舵水动力性能研究 [D].哈尔滨:哈尔滨工程大学,2010.
[5] 刘登成,黄国富.高效扭曲舵水动力特性数值分析 [C]//第十一届全国水动力学学术会议.无锡:中国造船工程学会,2011.
[6] SHEN Y T,JIANG C W,REMMERS K D.A twisted rudder for reduced cavitation [J].Journal of Ship Research,1997,41(4):260-272.
[7] 邓鸿,赵成璧.大型高速客货船的舵空泡剥蚀及解决方案探索 [J].船舶设计通讯,2005(1):65-69.DENG Hong,ZHAO Cheng-bi.Rudder cavitation and solution search for large fast passenger ferry [J].Journal of Ship Designs,2005(1):65-69.(in Chinese)
[8] 叶金铭,王威,李渊.抗空化扭曲舵设计及力学特性研究 [C]// 2015全国船舶水动力学会议论文集.哈尔滨:中国造船工程学会船舶力学学术委员会,2015.
[9] 叶金铭,王威,张凯奇,等.扭曲舵空化起始航速分析 [J].哈尔滨工程大学学报,2016,37(12):1631-1637.YE Jin-ming,WANG Wei,ZHANG Kai-qi,et al.Analysis on the cavitation inception speed of twisted rudder [J].Journal of Harbin Engineering University,2016,37(12):1631-1637.(in Chinese)
[10] KOOP A H,HOEIJMAKERS H W,SCHNERR G H,et al.Design of twisted cavitation hydrofoil using a barotropic flow method [C]// Six International Symposium on Cavitation.Wageningen,The Netherlands:CAV,2006.
[11] PERSSON T,BARK G,BENSOW R.Large eddy simulation of the cavitating flow around a wing [C]// Int.Symposium on cavitation,Wageningen,The Netherlands:CAV,2016.
[12] ACHKINADZE A S,BERG A,KRASILNIKOV V I,et al.Numerical prediction of cavitation on propeller lades and rudder using the velocity based source panel method with modified trailing edge [C]// Proceedings of the International Summer Scientific School "High Speed Hydrodynamics".Cheboksary,Russia:s.n.,2002.
[13] VLADIMIR I K,AAGE B,IVAR J.Numerical prediction of sheet cavitation on rudder and podded propellers using potential and viscous flow solutions [C]// Five International Symposium on Ca-vitation.Osaka,Japan:s.n.2003.
[14] KERWIN J,LEE C.Prediction of steady and unsteady marine propeller performance by numerical lifting-surface theory [J].Thrans.SNAME,1978,86:218-253.