摘要
利用高过载收缩管实验发动机,开展了强冲蚀条件下的绝热层烧蚀特性研究。实验结果表明:颗粒冲蚀区的炭化层厚度明显薄于非冲蚀区,且炭化层抗剪切能力较弱。通过机理分析,认为高浓度颗粒流的强冲蚀对炭化层具有强烈的剥蚀作用。结合数值计算方法,发展了一种利用少量烧蚀实验结果,获取大量烧蚀规律和信息的数据分析方法。建立了实验条件下的高硅氧酚醛材料的烧蚀量和颗粒冲蚀状态之间的函数形式,并给出了颗粒冲蚀状态与烧蚀率之间的经验公式,具有较强的工程实用价值。
For lack of effective experimental equipment, no report, to our best knowledge, has been published in the open literature on the eroding effect of highly concentrated particles on SRM （Solid Rocket Motor） insulator. Our aim is to use the high acceleration convergent tube motor developed by the 2nd and 3rd authors to provide such eroding effect. In the full paper, we discuss our experimental results in much detail; here we give only a briefing. Experimental results show that the depth of charred insulator material in eroded region was thinner than that in normal region and that the shear-resisting capability of charred layer of silica phenolic resin material was weak. Through exploration of the mechanism of erosion, we believe we can draw the important conclusion that the erosion of highly concentrated particles damages the charred layer of insulator severely. Based on the three-dimensional two-phase numerical method, we developed a data analysis technique that can provide abundant ablation information from just a small amount of test data. We also present two expressions of engineering significance. （1） the formula relating the loss of insulator material to particle kinetic energy and track angle; （2） the relationship between erosion rate and particle state.
出处
《西北工业大学学报》
EI
CAS
CSCD
北大核心
2005年第6期746-749,共4页
Journal of Northwestern Polytechnical University
基金
国家自然科学基金(50376054)
西北工业大学研究生创业种子基金(Z20040007)资助
