液氧罐晃动时防波板对罐体受力的影响

The Effect of Baffle on Stress of Sloshing Liquid Oxygen Tank

液氧贮存在船运罐中会发生晃动,这种现象会破坏罐内热力学平衡,对维护结构造成冲击,存在一定的安全隐患,因此需要进行液氧罐防晃研究。利用FLUENT软件中的欧拉模型,建立罐内液氧晃动的三维数值模型,考虑气液相间传质对相界面变化规律的影响,模拟了横摇状态下的液氧晃动,研究了晃动过程中罐内流体流态变化。通过分析并对比设置防波板前后的罐体所受压力与晃动力随时间的变化规律,探讨了不同高度T型防波板的晃动抑制效果与自身受力情况。结果表明,设置防波板能减小罐体受到的晃动力,但防波板自身也会受到冲击载荷且不同高度防波板受到的载荷不同。最后,对防波板的设置提出了一些建议。

Liquid oxygen sloshes when stored in marine tanks.Sloshing destroys the thermodynamic balance in the tank and impacts its maintenance structure,resulting in safety hazards,so the research on preventing liquid sloshing has certain research significance.Considering the effect of mass transfer between gas and liquid phase on phase interface,a three-dimensional numerical model of liquid oxygen sloshing was established to simulate the sloshing of liquid oxygen by using the Euler model in FLUENT software.Then the fluid flow regime changes in the tank were studied.On this basis,the variation characteristics of pressure and sloshing force on tank with time before and after installing the T-shaped baffle were analyzed and compared,in order to explore the sloshing suppression effect and force situation of baffles with different heights.The results show that the sloshing force on the tank can be reduced with baffle,but the baffle itself is also subjected to the different impact load with different heights.Finally,the suggestion of setting up the baffle is put forward.