Experimental Investigation on Ablation Characteristic of EPDM Insulator in Different Gas Environment

• 作 者: 王书贤 何国强 李江 刘佩进
• 机 构: National Key Laboratory of Combustion,Flow and Thermal-structure,Northwestern Polytechnical Universi
• 出 处: Journal of China Ordnance
• 发表日期: 2010年02期
• 关键词: ablation influent Insulator ingredient Ethylene environments insulator propellan

Some ablation experiments of Ethylene-Propylene-Diene Monomer(EPDM)insulator were carried out in quasi-static low temperature gas environment,gas-phase environment,two-phase environment with Al2O3 grain and high concentration Al2O3 grain gas environments.Their charring ablation rate,thickness,surface morphology and main ingredient of the charring layer were analyzed.The experiment results show that the main influent factors for the charring ablation rate are the gas temperature,grain concentration and state of grain impact;the main influent factors for the charring layer thickness are the gas velocity and environment pressure;and the process of SiO2 migrating in the charring layer occur commonly in different gas environments.They provide a foundation for the ablation mechanism research and modeling of EPDM insulator.

Some ablation experiments of Ethylene-Propylene-Diene Monomer (EPDM) insulator were carried out in quasi-static low temperature gas environment, gas-phase environment, two-phase environment with Al2O3 grain and high concentration Al2O3 grain gas environments. , thickness, surface morphology and main ingredient of the charring layer were analyzed. The experiment results show that the main influent factors for the charring ablation rate are the gas temperature, grain concentration and state of grain impact; the main influent factors for the charring layer thickness of the gas velocity and environment pressure; and the process of SiO2 migrating in the charring layer occur generally in different gas environments. The provide a foundation for the ablation mechanism research and modeling of EPDM insulator.