| Citation: | TAN Zhijie, LI Junwei, QIN Shengfu, et al. Simulation study on the influence of ignition cartridge location on ignition process in solid rocket motor[J]. Journal of Aerospace Power, 2025, 40（6）：20230705 doi: 10.13224/j.cnki.jasp.20230705
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By using the user-defined function (UDF) programming interface of computational fluid dynamics (CFD) software FLUENT, the ignition gas and propellant gas dosing models of solid rocket motor were established. The transient process of motor ignition with different ignition cartridge locations was simulated. The results showed that: (1) The ignition location directly affected the injection process of ignition gas, thus affecting the transient temperature and pressure changes in different locations of the combustion chamber. (2) Under middle ignition condition, the ignition gas propagated to both sides of the inner passage of the propellant at the same time, resulting in the shorter time for the complete ignition of the inner surface on the propellant. (3) The ignition pressure peaks of combustion chamber under head ignition, middle ignition and tail ignition were 10.741, 9.862 MPa and 10.023 MPa, respectively. The ignition pressure peaks under head ignition were 8.9% and 7.16% higher than those under middle ignition and tail ignition, respectively. (4) Under the condition of tail ignition, the heat transfer of the ignition gas to the propellant decreased, the ignition lag period and the flame propagation period increased, and the ignition delay was as high as 12.75 ms.
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