Experimental Investigation on Ablation Characteristic of EPDM Insulator in Different Gas Environments
Experimental Investigation on Ablation Characteristic of EPDM Insulator in Different Gas Environments
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不同气体环境下EPDM绝缘体烧蚀特性的实验研究
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发表时间：
2010
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对三元乙丙橡胶绝缘子在准静态低温气体环境、气相环境、含Al_2O_3颗粒的两相环境和高浓度Al_2O_3颗粒气体环境下进行了烧蚀试验，分析了烧蚀速率、烧蚀层厚度、表面形貌和主要成分。结果表明，影响烧蚀速率的主要因素是气体温度、颗粒浓度和颗粒撞击状态，影响烧蚀层厚度的主要因素是气流速度和环境压力；在不同的气体环境中，SiO_2在炭化层中的迁移过程是普遍存在的，为EPDM绝缘子烧蚀机理的研究和建模提供了基础。
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.