RANS方法预报对转桨非定常水动力性能研究
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摘要
对转螺旋桨的非定常激振力直接影响着对转桨的噪声性能及振动特性,准确预报对转桨的非定常性能可以更好地为对转桨设计工作服务。基于计算流体力学(CFD)中雷诺平均纳维-斯托克斯(RANS)方法,对对转桨非定常水动力性能预报方法进行研究。通过对前后桨区域及交界面处网格精细划分,结合滑移网格特点,考虑每一时间步内旋转角度的对应性,进行合理的计算设置,提高对转桨的非定常性能预报精度。进行了2对对转桨方案的非定常水动力性能数值模拟,与试验数据的比较分析验证了预报方法的准确性和可行性。
The unsteady exciting force of contra-rotating propellers(CRPs) can generate line-spectrum noise and vibration. Predicting unsteady hydrodynamic performance of CRPs precisely is important for the design of CRPs. A numerical method to predict CRPs unsteady hydrodynamic performance is developed based on the solution of RANS equations with the SST k-ω turbulence model, using the sliding mesh model to simulate the unsteady interaction between the forward and aft propeller. To improve the prediction accuracy, meshes around the interface of the forward and aft propeller are generated with a refined strategy, combining the sliding mesh 's characteristics, besides, the calculation is set up reasonably by considering the correspondence of rotating angle in every calculating time-step.Numerical predictions were carried out for two sets of CRPs, and results were compared with model test data.Comparison and analysis indicate that the prediction method developed in this article yields more accurate results and this method is effective.
The unsteady exciting force of contra-rotating propellers(CRPs) can generate line-spectrum noise and vibration. Predicting unsteady hydrodynamic performance of CRPs precisely is important for the design of CRPs. A numerical method to predict CRPs unsteady hydrodynamic performance is developed based on the solution of RANS equations with the SST k-ω turbulence model, using the sliding mesh model to simulate the unsteady interaction between the forward and aft propeller. To improve the prediction accuracy, meshes around the interface of the forward and aft propeller are generated with a refined strategy, combining the sliding mesh 's characteristics, besides, the calculation is set up reasonably by considering the correspondence of rotating angle in every calculating time-step.Numerical predictions were carried out for two sets of CRPs, and results were compared with model test data.Comparison and analysis indicate that the prediction method developed in this article yields more accurate results and this method is effective.
引文
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[14]INUKAI Y,KANEMARU T,ANDO J.Prediction of steady performance of contra-rotating propellers with rudder[C]//Proceedings of the 4th International Symposium on Marine Propulsors.Austin,Texas,USA,2015:TA1-2.
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[16]MENTER F R.Two-equation eddy-viscosity turbulence models for engineering applications[J].AIAA journal,1994,32(8):1598-1605.
[2]TSAKONAS S,JACOBS W R,LIAO P.Prediction of steady and unsteady loads and hydrodynamic forces on contra-rotating propellers[J].Journal of ship research,1983,27(3):197-214.
[3]YANG Chenjun,TAMASHIMA M,WANG Guoqiang,et al.Prediction of the steady performance of contra-rotating propellers by lifting surface theory[J].Transactions of the West-Japan Society of naval architects,1991,82:17-31.
[4]YANG C J,TAMASHIMA M,WANG G Q,et al.Prediction of the unsteady performance of contra-rotating propellers by lifting surface theory[J].Transactions of the West-Japan society of naval Architects,1992:17-31.
[5]LIU Xiaolong.A potential based panel method for prediction of steady and unsteady performances of contrarotating propellers[C]//Proceedings of the 1st International Symposium on Marine Propulsors.Trondheim,Norway,2009:WA4-3.
[6]GU H,KINNAS S A.Modeling of contra-rotating and ducted propellers via coupling of a vortex-lattice with a finite volume method[C]//Proceedings of Propellers/Shafting 2003 Symposium.Virginia,USA,2003:6-17.
[7]SU Yiran,KINNAS S A,JUKOLA H.Application of a BEM/RANS interactive method to contra-rotating propellers[C]//Proceedings of the 5th International Symposium on Marine Propulsion.Espoo,Finland,2017:WA3-1.
[8]张涛,杨晨俊,宋保维.基于MRF模型的对转桨敞水性能数值模拟方法探讨[J].船舶力学,2010,14(8):847-853.
[9]ZHANG Tao,YANG Chenjun,SONG Baowei,et al.CFDsimulation of the unsteady performance of contra-rotating propellers[J].Journal of ship mechanics,2011,15(6):605-615.
[10]WANG Zhanzhi,XIONG Ying.Effect of time step size and turbulence model on the open water hydrodynamic performance prediction of contra-rotating propellers[J].China ocean engineering,2013,27(2):193-204.
[11]SASAKI N,KURODA M,FUJISAWA J,et al.On the model tests and design method of hybrid CRP podded propulsion system of a feeder container ship[C]//Proceedings of the 1st International Symposium on Marine Propulsors.Trondheim,Norway,2009:TA2-1
[12]GRASSI D,BRIZZOLARA S,VIVIANI M,et al.Design and analysis of counter-rotating propellers-comparison of numerical and experimental results[J].Journal of hydrodynamics,Ser.B,2010,22(5S1):570-576.
[13]INUKAI Y,OCHI F.A study on the characteristics of self-propulsion factors for a ship equipped with ContraRotating Propeller[C]//Proceedings of the 1st International Symposium on Marine Propulsors.Trondheim,Norway,2009:MB1-3.
[14]INUKAI Y,KANEMARU T,ANDO J.Prediction of steady performance of contra-rotating propellers with rudder[C]//Proceedings of the 4th International Symposium on Marine Propulsors.Austin,Texas,USA,2015:TA1-2.
[15]INUKAI Y,ANDO J.Full scale performance prediction method for a ship with ContraRotating propellers[C]//Proceedings of the 5th International Symposium on Marine Propulsion.Espoo,Finland,2017:WA3-3.
[16]MENTER F R.Two-equation eddy-viscosity turbulence models for engineering applications[J].AIAA journal,1994,32(8):1598-1605.