Effect of baffle on the dynamic and thermal characteristics of vehicle-mounted liquid hydrogen cylinders under shaking conditions
In order to understand the influence of the baffle on the sloshing behavior of the fluid in the liquid hydrogen cylin-der,the thermodynamic characteristics of the baffle on the inner cylinder chamber under shaking conditions were numerically sim-ulated by the established numerical model of the non-isothermal two-dimensional vehicle-mounted liquid hydrogen cylinder.The results show that the baffle has a significant effect on the liquid level,pressure and temperature in the inner cylinder chamber during the shaking process.Shaking increases the contact area of the gas-liquid phase in the inner cylinder chamber,promotes heat exchange,destroys the initial thermal stratification,and causes pressure and temperature to drop.However,the baffle re-duces the shaking amplitude of the liquid in the inner cylinder chamber,and the pressure and temperature in the shaking process are higher than those in the cylinder chamber without the baffle,and the pressure and temperature drop rate is the largest in the first 0.5 s.In addition,the baffle also plays the role of a"thermal bridge"to a certain extent,and a certain high temperature ar-ea will be formed in the area around the baffle.
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