Research and optimization on the exhaust flow characteristic based on energy splitting method of the low speed marine diesel engine

Abstract

In this study, an optimization scheme for exhaust flow characteristics based on energy splitting method is proposed. The low-speed marine diesel engine adopts the exhaust energy splitting method during the exhaust process. Based on this, a one-dimensional GT Power calculation model, a three-dimensional CONVERGE calculation model, and a three-dimensional model of the gas collection box are established. After splitting, the vortex structure in the same phase of the gas collection box has a larger scale, higher flow rate, more significant entropy increase, and more severe turbulence dissipation. The high-grade gas collection box is optimized from the perspectives of length and diameter; The results show that after optimization, the flow energy dissipation brought by the vortex structure is reduced, and the outlet pressure and flow velocity of the gas collection box are increased.