前置与后置定子泵喷推进器的水动力性能对比
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摘要
为探究前置和后置定子泵喷水动力性能上的不同,本文采用计算流体力学方法,基于物理试验数据验证的数值计算模型,从敞水性能、空化性能和脉动特性3个方面对两类泵喷的水动力性能差异进行研究。结果表明:在消耗功率相同、几何尺寸近似的前提下,后置定子泵喷推进性能、平衡性优于前置定子泵喷,在较宽进速范围其推力效率比后者高2%;前置定子泵喷抗空化性能比后置定子泵喷差,空化数越小,推力效率降低幅值越大;前置定子泵喷转子叶片引起的旋转部件流场脉动压力幅值大于后置定子泵喷,而定子、导管等静止部件的流场脉动压力与之相反,后置定子泵喷脉动压力幅值大于前置定子泵喷。
To analyze the difference in hydrodynamic performance between a front-stator pump-jet and a rear-stator pump-jet,a computational fluid dynamic( CFD) method based on validated numerical simulation model which had been compared with physcial test data was used to compare the two pump-jets. Open-water performance,cavitation capability,and pressure fluctuation characteristics were compared. The results showed that under the assumptions of equal consumption power and similar geometrical size,the rear-stator pump-jet showed better propulsion and balance performance than the front-stator pump-jet. In a wider advance ratio range,the efficiency of the rear-stator was2% higher than the front-stator jet. The cavitation capability of the front-stator pump-jet was worse than that of the rear-stator pump-jet,as the efficiency drop amplitude increased with decreasing cavitation number. The pressure fluctuation around the front-stator pump-jet rotor blades was higher than that of the rear-stator pump-jet,while,to the contrary,the pressure fluctuation caused by static components of the stator and duct was lower than that of the rear-stator pump-jet.
To analyze the difference in hydrodynamic performance between a front-stator pump-jet and a rear-stator pump-jet,a computational fluid dynamic( CFD) method based on validated numerical simulation model which had been compared with physcial test data was used to compare the two pump-jets. Open-water performance,cavitation capability,and pressure fluctuation characteristics were compared. The results showed that under the assumptions of equal consumption power and similar geometrical size,the rear-stator pump-jet showed better propulsion and balance performance than the front-stator pump-jet. In a wider advance ratio range,the efficiency of the rear-stator was2% higher than the front-stator jet. The cavitation capability of the front-stator pump-jet was worse than that of the rear-stator pump-jet,as the efficiency drop amplitude increased with decreasing cavitation number. The pressure fluctuation around the front-stator pump-jet rotor blades was higher than that of the rear-stator pump-jet,while,to the contrary,the pressure fluctuation caused by static components of the stator and duct was lower than that of the rear-stator pump-jet.
引文
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[20]王立祥,张新.喷水推进轴流泵与导管桨[J].船舶工程,2008,30(1):26-19.WANG Lixiang,ZHANG Xin. Waterjet axial pump and the duct propeller[J]. Ship engineering,2008,30(1):26-19.
[2]王天奎,唐登海.泵喷推进器——低噪声的核潜艇推进方式[J].现代军事,2006(7):52-54.WANG Tiankui,TANG Denghai. Pumpjet-propulsion mode of low noise nuclear submarine[J]. Modern military,2006(7):52-54.
[3]刘文峰,胡欲立.新型水下集成电机推进装置的泵喷射推进器结构原理及特点分析[J].鱼雷技术,2007,15(6):5-8.LIU Wenfeng,HU Yuli. Analysis of construction principle and characteristics of pump-jet for underwater integrated motor propulsor[J]. Torpedo technology,2007,15(6):5-8.
[4]王永生,刘承江,苏永生,等.舰船新型推进系统[M].北京:国防工业出版社,2014:360-362.WANG Yongsheng,LIU Chengjiang,SU Yongsheng,et al.New propulsion system for warships[M]. Beijing:National Defense Industry Press,2014:360-362.
[5]刘小龙.水下航行体泵喷推进器非定常水动力预报的面元法研究[D].上海:上海交通大学,2006.LIU Xiaolong. Prediction of unsteady performances of pumpjet propulsors for underwater vehicles by a potential based panel method[D]. Shanghai:Shanghai Jiao Tong University,2006.
[6]SURYANARAYANA C,SATYANARAYANA B,RAMJI K,et al. Experimental evaluation of pumpjet propulsor for an axisymmetric body in wind tunnel[J]. International journal of naval architecture and ocean engineering,2010,2(1):24-33.
[7]IVANELL S. Hydrodynamic simulation of a torpedo with pumpjet propulsion system[D]. Stockholm,Sweden:Royal Institute of Technology,2001.
[8]DAS H N,JAYAKUMAR P,SAJI V F,et al. CFD examination of interaction of flow on high-speed submerged body with pumpjet propulsor[C]//5th International Conference on High-Performance Marine Vehicles. Launceston,Tas:Australian Maritime College,2006.
[9]刘业宝.水下航行器泵喷推进器设计方法研究[D].哈尔滨:哈尔滨工程大学,2013.LIU Yebao. Study on design methed of pump jet thruster for underwater vehicles[D]. Harbin:Harbin Engineering University,2013.
[10]饶志强.泵喷推进器水动力性能数值模拟[D].上海:上海交通大学,2012.RAO Zhiqiang. Numerical simulation of hydrodynamical performance of pump jet propulsor[D]. Shanghai:Shanghai Jiao Tong University,2012.
[11]刘占一,宋保维,黄桥高,等.基于CFD技术的泵喷推进器水动力性能仿真方法[J].西北工业大学学报,2010,28(5):724-729.LIU Zhanyi, SONG Baowei, HUANG Qiaogao, et al.Applying CFD Technique to calculating successfully hydrodynamic performance of water jet pump[J]. Journal of northwestern polytechnical university, 2010, 28(5):724-729.
[12]PAN Guang,LU Lin. Numerical investigation of a pumpjet propulsor based on CFD[J]. International journal of control and automation,2015,8(11):225-234.
[13]LU Lin,PAN Guang,WEI Jing,et al. Numerical simulation of tip clearance impact on a pumpjet propulsor[J].International journal of naval architecture and ocean engineering,2016,8(3):219-277.
[14]SHI Yao,PAN Guang,HUANG Q,et al. Numerical simulation of cavitation characteristic of pump-jet propeller[C]//CCP2014. Boston,USA,2014.
[15]杨琼方,张志宏,王永生.螺旋桨叶截面空化模拟数值模型的改进与评估[J].北京理工大学学报,2011,31(12):1401-1407.YANG Qiongfang,ZHANG Zhihong,WANG Yongsheng.Improvement and evaluation of numerical model for cavitation flow viscous simulation around propeller blade section[J]. Transactions of Beijing institute of technology,2011,31(12):1401-1407.
[16]JI Bin,LUO Xianwu,WU Yulin,et al. Numerical investigation of unsteady cavitating turbulent flow around a full scale marine propeller[J]. Journal of hydrodynamics,ser.B,2010,22(S5):747-752.
[17]SALVATORE F,PEREIRA F,FELLI M,et al. Description of the INSEAN E779A propeller experimental dataset[R]. INSEAN,Rome,Italy 2007.
[18]SALVATORE F,STRECKWALL H,VAN TERWISGA T.Propeller cavitation modelling by CFD-results from the VIRTUE 2008 Rome workshop[C]//First International Symposium on Marine Propulsors. Trondheim,Norway:Norwegian Marine Technology Research Institute,2009.
[19]SALVATORE F,TESTA C,GRECO L. A Viscous/inviscid coupled formulation for unsteady sheet cavitation modelling of marine propellers[C]//Fifth International Symposium on Cavitation(CAV2003). Osaka,Japan,2003.
[20]王立祥,张新.喷水推进轴流泵与导管桨[J].船舶工程,2008,30(1):26-19.WANG Lixiang,ZHANG Xin. Waterjet axial pump and the duct propeller[J]. Ship engineering,2008,30(1):26-19.