关键词: 固体火箭发动机;绝热层;烧蚀

Abstract: The ablation experiments of silica phenolic resin material eroded by highly concentrated particles were carried out by using the high acceleration ablation simulation test motor. The experiments show that the ablation rate of silica phenolic resin material eroded by highly concentrated particles is higher than that in normal condition. The mechanism of this phenomena is that the erosion of highly concentrated particles can destroy its charring layer strongly. The measurement results show that the characteristic of resistant to erosion of particles of asbestos phenolic molded composite is better than silica phenolic resin material. The available means to improve insulation material’s resistant to erosion by particles is to enhance the compactness and toughness of its charring layer. The routine to build the ablation models of insulation materials was brought forward.

Key words: Solid propellant rocket engine;Heat insulation layer;Ablation