摘要
针对平板底部直接喷气形成气液混合流的复杂情况,采用Mixture模型与RANS方程相结合的方法建立了气液混合流粘性流场数值计算模型。通过对4种湍流模型、4种网格、3种壁面处理方法进行组合,形成了8种不同的数值计算方法,分析了壁面函数、壁面第1层网格、湍流模型等对数值计算结果的影响,并与试验结果进行对比,获得了可有效模拟气液混合流的数值模型。研究结果表明：采用RNG k-ε湍流模型、标准壁面函数、第1层网格1 mm、y＋为31~35的计算方案,所得结果可用于平底船底部气液混合流分析。
In order to investigate the complexity of gas-liquid mixing under different condition of flat plate, a method with the combination of RANS equations and Mixture model is proposed for the viscous-flow calculation of a large flat bottom ship. There are eight different numerical calculation method formed by a combination 4 kinds of turbulence models, grid, and 3 kinds of wall treatment. The influence of wall function, the first layer of mesh wall and turbulence models for nu- merical results was analyzed. Experimental results were compared with the numerical study. The results show that： RNG k-ε turbulence model, standard wall function, lmm first layer of mesh, y ＋ for the calculation of 31 to 35, the results can be used for mixed-flow analysis.
出处
《舰船科学技术》
北大核心
2016年第8期47-51,共5页
Ship Science and Technology
基金
工信部高技术船舶科研资助项目([2011]530)
高性能船舶技术教育部重点实验室开放基金资助项目(2013033102)
