Investigation of Transient Erosion Behavior of Single and Dual‐Tapered Pipe Components

This study investigated the erosion wear characteristics of a forcing cone (FC) induced by high‐speed dense propellant particle groups during the initial internal ballistic phase of a launching system. By coupling the computational fluid dynamics and discrete element method (CFD‐DEM) with the initial internal ballistics model, the transient erosion behaviors of two FC components with distinct tapered structures were quantitatively assessed. The FLUENT software was adopted for the CFD simulations. The findings revealed that the mass losses of both types of FCs experience exponential growth over time. In the single‐stage FC, the erosion pattern at the left end was characterized by a ring‐like distribution, whereas the middle and right ends exhibited irregular cloud‐like distributions. In the dual‐stage FC, erosion was predominantly concentrated in the first section. The mass loss of the dual‐stage FC was significantly lower, showing a 7.3% reduction compared to that of the single‐stage FC. From the perspective of erosion evaluation, the dual‐stage FC exhibits superior structural performance.