Author(s)

Yongqiang Wu, Ziyan Pei

Corresponding Author

Yongqiang Wu

Abstract

In the daily operation of the vehicle gas cylinder, when the number of BOG (boil-off gas) in the cylinder reaches a certain level, in order to avoid overpressure of the cylinder, the BOG needs to be safely discharged. The blowdown process of the gas cylinder is a non-equilibrium process. In order to prevent the wall temperature of the cylinder in contact with the fluid during the blowdown process from reaching the brittle-ductile transition temperature of the material, the change of temperature field and pressure field inside the cylinder during blowdown with time are studied. Using FLUENT to carry out simulation, the pressure and temperature of the LNG cylinders in the vehicle during the blowdown process are studied, which provides a reliable basis for the selection of the cylinder material.

Keywords

FLUENT Simulation, Vehicle LNG Cylinder, Pressure Drop, Temperature