Investigation for Local Erosion Characteristics in the Combustion Chamber of Dual Pulse Motor
During the pulse 2 of a dual pulse motor (DPM), severe local insulation erosion usually occurred on its pulse 1 combustion chamber wall. An axis-symmetric and viscous simulation of DPM inner flow has been conducted in order to investigate the erosion characteristics by using CFD software FLUENT. It is revealed that turbulent intensity level increase sharply in the zone of severe insulation erosion which indicates enhancement of heat convection was generated in those spots and caused the erosion. That convection enhancement is related with the reattachment flow in pulse 1 chamber closely which originated form the sudden expansion combustion chamber structure of DPM. Based on the new conclusion, contrastive simulations reflect that the variation of design factors, such as motor mass flow rate and shape size of combustion chambers, will affect the intensity and position of erosion zone greatly, which means DPM design factors should be optimized to avoid heavy local erosion. If not, special insulation enhancement would be needed to fix up the dangerous spot of severe erosion.
solid rocket motor dual pulse motor insulation erosion flow simulation
Liu Yabing Wang Changhui Liu Yu
School of Astronautics, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
国际会议
2010 Asia-Pacific International Symposium on Aerospace Technology(2010 亚太航空航天技术研讨会 APISAT 2010)
西安
英文
1068-1071
2010-09-01（万方平台首次上网日期，不代表论文的发表时间）