冲蚀条件下炭布橡胶绝热层烧蚀实验与计算

开展了冲蚀条件下一种炭布橡胶类绝热材料的烧蚀实验,研究了颗粒浓度和冲蚀速度对该绝热层烧蚀的影响规律。实验结果表明,实验条件下冲蚀速度是影响绝热层烧蚀的最主要因素;冲蚀速度较低时,即使颗粒浓度很高,烧蚀率也不是很大。在实验基础上建立了一种基于炭化烧蚀模型的烧蚀计算模型,即首先根据实验数据建立冲蚀状态与炭层厚度之间的关系,然后采用传统的炭化烧蚀模型进行烧蚀计算,计算结果与实验结果在一定程度上较为吻合。

Experiment and calculation on erosion of carbon cloth rubber insulation eroded by particles

The erosion experiments of a kind of carbon cloth rubber insulation material eroded by particles were carried out and the influences of concentration and velocity of particle on the erosion of insulation were investigated.The experimental results show that the velocity of particle has greater effect on erosion of insulation than the concentration of particle.When the velocity of particle is low,the erosion rate is relatively small even if the concentration value of particle is very high.An ablation computation model based on carbonization ablation model was developed according to the experimental results,that is first the relationship between the carbonization layer thickness with the erosion state parameters was set up on the basis of the experimental data,then the conventional carbonization erosion computation model was used for calculation of erosion rate.The computation results agreed with the experimental results to a certain extent.