螺旋桨定常/非定常水动力性能CFD不确定度分析  被引量:4

Uncertainty analysis of CFD for steady/transient hydrodynamic performance of propeller

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作  者:徐野[1] 熊鹰[1] 黄政[1] XU Ye;XIONG Ying;HUANG Zheng(College of Naval Architecture&Ocean Engineering,Naval Univ.of Engineering,Wuhan 430033,China)

机构地区:[1]海军工程大学舰船与海洋学院

出  处:《海军工程大学学报》2019年第6期40-45,共6页Journal of Naval University of Engineering

基  金:国家自然科学基金资助项目(51179198)

摘  要:为评估计算流体力学(CFD)方法预报螺旋桨定常及非定常水动力性能的可信度,分析了误差来源并提出改进措施,采用RANS方法并选用SST k-ω湍流模型选取三套网格和三种时间步长对DTMB 4119螺旋桨的定常及非定常水动力性能进行了数值计算,并对计算结果进行了验证与确认。不确定度分析结果表明:螺旋桨定常水动力性能在设计及低进速系数时得到确认,高进速系数时未得到确认;可采用加密网格的方式降低数值不确定度,从而将评估模型误差用于改进计算模型;非定常水动力性能修正后的数值不确定度小于1%,可在2%~3%的水平上得到确认,能够满足其计算精度要求。In an effort to evaluate the credibility of CFD method when predicting propeller′s steady and transient hydrodynamic performance, and to analyze error sources and propose improving mea-sures, steady and transient hydrodynamic performances of DTMB 4119 propeller are calculated numerically using RANS method and SST k-ω turbulence model. Three grids and three time steps are applied, and the numerical results are verified and validated. Uncertainty analysis results show that steady hydrodynamic performance of propeller is validated at design and low advance coefficient but is not done at high advance coefficient, and thus finer grids can be used to reduce numerical uncertainty, so as to quantify the modeling error and guide the modeling improvements;that numerical uncertainty of transient hydrodynamic performance is less than 1% and the results are validated at a level of 2%~3% after correction,which proves the numerical method proposed can satisfy the requirement of computational accuracy.

关 键 词:螺旋桨 非定常水动力性能 CFD 不确定度 

分 类 号:U661.31[交通运输工程—船舶及航道工程]

 

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