RANS,DES和LES对螺旋桨流噪声预报的适用性分析
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摘要
[目的]为研究不同湍流模型在螺旋桨流噪声预报中的适用性,以DTMB 4119螺旋桨为研究对象,对非均匀进流条件下的频域噪声进行数值模拟。[方法]首先,采用RANS方法计算螺旋桨在不同进速下的水动力系数和桨叶表面压力分布,并将仿真值与试验值进行比较,验证流场模拟的准确性;然后,分别将RANS,DES和LES这3种方法得到的脉动压力作为声源,结合声学边界元预报辐射噪声。[结果]计算结果表明,线谱噪声是螺旋桨总噪声的主要贡献者;当预报一阶叶频上的噪声时,3种方法所得结果较为接近,可以采用RANS方法进行快速预报;当预报高阶叶频上的噪声时,采用LES方法预报的结果更加准确。[结论]在噪声预报时可以根据需求选择合适的湍流模拟方法。
[Objectives]In order to study the applicability of different turbulence models in propeller flownoise prediction,taking the DTMB 4119 propeller as the research object,the numerical simulationmethod is used to calculate the frequency domain noise under the non-uniform flow field.[Methods]First,the hydrodynamic coefficient and surface pressure distribution coefficient are obtained via the RANSmethod and the accuracy of the flow field simulation is verified by comparing it with the experimental data.Next,the pulsating pressures obtained by RANS,DES and LES are considered as the sound sourcerespectively,and combined with the acoustic boundary element method to predict the radiation noise.[Results]The results show that spectral noise is the main contributor to total noise;when noise on 1 BPFis predicted,the results obtained by the three methods are very similar,so we can use RANS to predictnoise quickly;when noise on the high order of BPF needs to be predicted,the calculation results of LESare better. [Conclusions]In noise prediction,the appropriate turbulence simulation method can beselected according to the demand.
[Objectives]In order to study the applicability of different turbulence models in propeller flownoise prediction,taking the DTMB 4119 propeller as the research object,the numerical simulationmethod is used to calculate the frequency domain noise under the non-uniform flow field.[Methods]First,the hydrodynamic coefficient and surface pressure distribution coefficient are obtained via the RANSmethod and the accuracy of the flow field simulation is verified by comparing it with the experimental data.Next,the pulsating pressures obtained by RANS,DES and LES are considered as the sound sourcerespectively,and combined with the acoustic boundary element method to predict the radiation noise.[Results]The results show that spectral noise is the main contributor to total noise;when noise on 1 BPFis predicted,the results obtained by the three methods are very similar,so we can use RANS to predictnoise quickly;when noise on the high order of BPF needs to be predicted,the calculation results of LESare better. [Conclusions]In noise prediction,the appropriate turbulence simulation method can beselected according to the demand.
引文
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[15]YE J M,XIONG Y,XIAO C R,et al.Prediction of non-cavitation propeller noise in time domain[J].China Ocean Engineering,2011,25(3):531-538.
[2]王春旭,吴崇建,陈乐佳,等.流致噪声机理及预报方法研究综述[J].中国舰船研究,2016,11(1):57-71.WANG C X,WU C J,CHEN L J,et al.A comprehensive review on the mechanism of flow-induced noise and related prediction methods[J].Chinese Journal of Ship Research,2016,11(1):57-71(in Chinese).
[3]SEOL H,JUNG B,SUH J C,et al.Prediction of non-cavitating underwater propeller noise[J].Journal of Sound and Vibration,2002,257(1):131-156.
[4]SEOL H,SUH J C,LEE S.Development of hybrid method for the prediction of underwater propeller noise[J].Journal of Sound and Vibration,2005,288(1/2):345-360.
[5]张永坤,熊鹰,赵小龙.螺旋桨无空泡噪声预报[J].噪声与振动控制,2008,28(1):44-47.ZHANG Y K,XIONG Y,ZHAO X L.Prediction of propeller non-cavitations noise[J].Noise and Vibration Control,2008,28(1):44-47(in Chinese).
[6]ZHANG Y K,XIONG Y.Numerical method for predicting ship propeller cavitation noise[C]//2011 30th100Chinese Control Conference.Yantai,China:IEEE,2011:5722-5726.
[7]PANTLE I,MAGAGNATO F,GABI M.Numerical noise prediction in fluid machinery[J].Journal of Thermal Science,2005,14(3):230-235.
[8]ZHANG M Y,LIN R L,WANG Y S,et al.Numerical analysis of load-noise of a highly-skewed propeller behind submarine[J].Journal of Ship Mechanics,2016,20(9):1190-1200.
[9]王超,郑小龙,黄胜,等.基于无限元方法预报非均匀流中螺旋桨的流噪声[J].中国造船,2015,56(2):142-149.WANG C,ZHENG X L,HUANG S,et al.Prediction of flow noise of propeller in non-uniform flow based on acoustic infinite element method[J].Shipbuilding of China,2015,56(2):142-149(in Chinese).
[10]黄胜,张立新,王超,等.螺旋桨水动力性能的大涡模拟计算方案分析[J].武汉理工大学学报(交通科学与工程版),2014,38(3):473-477.HUANG S,ZHANG L X,WANG C,et al.Study on large eddy simulation calculation of propeller hydrodynamic performance[J].Journal of Wuhan University of Technology(Transportation Science and Engineering),2014,38(3):473-477(in Chinese).
[11]谭廷寿.非均匀流场中螺旋桨性能预报和理论设计研究[D].武汉:武汉理工大学,2003.TAN T S.Performance prediction and theoretical design research on propeller in non-uniform flow[D].Wuhan:Wuhan University of Technology,2003(in Chinese).
[12]高富东,潘存云,蔡汶珊,等.基于CFD的螺旋桨敞水性能数值分析与验证[J].机械工程学报,2010,46(8):133-139.GAO F D,PAN C Y,CAI W S,et al.Numerical analysis and validation of propeller open-water performance based on CFD[J].Journal of Mechanical Engineering,2010,46(8):133-139(in Chinese).
[13]BOSWELL R J,MILLER M L.Unsteady propeller loading-measurement,correlation,with theory and parametric study[R].Maryland:DTNSRDC,1968.
[14]杨琼方,王永生,曾文德,等.大侧斜螺旋桨负载噪声的边界元数值声学方法频域内计算分析[J].兵工学报,2011,32(9):1118-1125.YANG Q F,WANG Y S,ZENG W D,et al.Calculation of highly-skewed propeller's load noise using BEM numerical acoustics method in frequency domain[J].Acta Armamentarii,2011,32(9):1118-1125(in Chinese).
[15]YE J M,XIONG Y,XIAO C R,et al.Prediction of non-cavitation propeller noise in time domain[J].China Ocean Engineering,2011,25(3):531-538.