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A parametric sensitivity study on LNG tank sloshing loads by numerical simulations

机译:LNG储罐晃荡载荷参数敏感性的数值模拟研究。

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摘要

A series of parametric sensitivity studies on unmatched dimensionless scale parameters is carried out on the liquified natural gas (LNG) tank sloshing loads by using a computational fluid dynamics (CFD) program. First, a brief dimensional analysis is conducted to identify the governing and non-matched non-dimensional parameters, assuming that Froude scaling law is adopted. Then the sensitivity of impact pressure is checked through numerical simulations against non-matched parameters, such as fluid viscosity, liquid-gas density ratio, and ullage pressure and compressibility. The CFD simulations are also verified against experimental results. It is concluded that the effects of viscosity and density ratio are insignificant, while the compressibility of ullage space plays an appreciable role, as was pointed out by Bass et al. [Bass, R.L., Bowles, E.B., Trudell, R.W., Navickas, J., Peck, J.C., Yoshimura, N., Endo, S., Pots, B.F.M., 1985. Modeling criteria for scaled LNG sloshing experiments. Transactions of the ASME 107, 272-280].
机译:通过使用计算流体动力学(CFD)程序,对液化天然气(LNG)罐的晃荡载荷进行了无与伦比的无量纲尺度参数的一系列参数敏感性研究。首先,假设采用了Froude比例定律,则进行简短的尺寸分析以识别控制参数和不匹配的非尺寸参数。然后,通过数值模拟针对不匹配的参数(例如流体粘度,液-气密度比以及空载压力和可压缩性)检查冲击压力的敏感性。还针对实验结果验证了CFD模拟。得出的结论是,粘度和密度比的影响不明显,而剩余空间的可压缩性起着相当大的作用,正如Bass等人所指出的。 [Bass,R.L.,Bowles,E.B.,N.Vadkas,J.,Peck,J.C.,Yoshimura,N.,Endo,S。,Pots,B.F.M.,1985。规模化LNG晃荡实验的建模标准。 [ASME 107,272-280]。

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