Simulation of vertical launching gas flow self-drainage based on dynamic grid technology
Aiming at the structural optimization design of the vertical launching self-drainage device,a physical and three-dimensional turbulence model of such a device was established,and the numerical simulation flow of the gas flow was constructed.The tetrahedral dynamic grid updating method was adopted to realize the fine numerical simulation of the whole process of the"unsteady"self-drainage of the gas flow.The variable residuals of that method converge quickly(＜10-3)and meet the requirements of engineering numerical calculation.The study shows that the instantaneous temperature of the gas flow pressure on the bottom of the cylinder is nearly 3 000 K,the impact reaches 2.5 MPa,the gas flow has a direct influence on the drainage efficiency,and that the influence of the inner and outer cylinder gap on the gas flow return efficiency is irregular,but the equal drainage characteristics are enhanced with the increase of the contraction angle after 0.2 seconds.The results may serve as a refe-rence for the structural optimization of the gas flow guide device.
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维普
