Analysis of Factors Affecting Heat Transfer and Ablation of Glass Wool in Silo Launching

Ji-jun ZHANG, Jian XIE, Liang LI, Hui Quan

Abstract


For rocket silo launching, the heat transfer and ablation problem of glass wool, the main material of silencer layer. The glass wool with severely ablated area was selected as research object, and a unidirectional fluid-structure coupled heat transfer ablation model was established. Through the secondary development of abaqus subroutine, the influence of silo diameter and initial impact height of jets flow on the ablation of glass wool was studied using factor decoupling control method. The simulation results show that reducing diameter of silo can aggravate the ablation damage of glass wool in the process of rocketing out of silo. During the tempering phase of jets flow field, the smaller silo diameter is, the higher the peak value of average ablation rate is, and the sooner the peak value appears; Increasing initial impact height of jets flow can mitigate the ablation damage of glass wool in the process of rocketing out of silo. During the tempering phase of jets flow field, the greater initial impact height of jets flow is, the smaller the peak value of average ablation rate is, and the later the peak appears. Changing silo diameter and initial impact height of jets flow have less effect on the ablation damage of glass wool during the drainage stage and subsequent stages of jets flow field.

Keywords


Jets flow, Glass wool, Heat transfer ablation, Unidirectional fluid-solid coupling, Secondary development of abaqus


DOI
10.12783/dtcse/cscbd2019/30021

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