A heat transfer model for aluminum droplet/wall impact
A heat transfer model for aluminum droplet/wall impact
复制标题
铝滴/壁碰撞的传热模型
DOI：
10.1016/j.ast.2019.105639
复制
发表时间：
2020-02
影响因子：
5.6
通讯作者：
Jinjia Wei
中科院分区：
文献类型：
--
作者：
Chao Li;Guanjie Wu;Mengzhe Li;Chunbo Hu;Jinjia Wei
固体火箭发动机中的烧蚀燃烧部分是由稠密高温液滴射流冲击固体壁面过程的热流增量效应引起的，其基本物理过程是单个熔滴冲击固体壁面。然而，由于燃烧室内的复杂过程，到目前为止，还没有科学地描述这种条件下的磨损机理。本文模拟燃烧室条件，对单个铝液滴撞击壁面的弹跳过程进行了实验研究。根据实验数据对液滴接触时间和最大铺展因子的理论模型进行了修正。建立了考虑单个铝液滴与壁面碰撞过程的理论传热模型，并假设壁面为由固体材料和空气空腔组成的复合结构。理论预测的液滴与固体壁面之间的热通量量级约为10 3 <$10 4 W/cm 2，单个液滴撞击时传递到壁面的热量约为10 − 6 <$10 − 5 J。
The erosive burning in solid rocket motor is partly caused by heat flux increment effect of dense high-temperature droplet jet impact process, of which the basic physical process is single molten droplet impact solid wall. However, due to the complex process in combustion chamber, until now, the erosion mechanism under such conditions has not been scientifically described. In this study, with the combustion chamber condition being simulated, the bouncing process of single molten aluminum droplet/wall impact was obtained experimentally. The theoretical model about droplet contact time as well as the maximum spreading factor were modified based on the experiment data. The theoretical heat transfer model accounting for single aluminum droplet/wall impact process was established, with the assumption of a composite structure consisting of solid material and air cavities on the solid wall surface. The theoretical predicted magnitude order of heat flux between droplet and solid wall surface is approximately 10 3∼ 10 4 W/cm 2, and the heat transferred to the wall is approximately 10− 6∼ 10− 5 J for single droplet impact.
登录
查看更多内容
影响因子：
5.6
作者：
Afroz Javed;D. Chakraborty
通讯作者：
Afroz Javed;D. Chakraborty
影响因子：
5.6
作者：
Pengfei Fu;Lingyun Hou;Z. Ren;Zhen Zhang;Xiaofang Mao;Yusong Yu
通讯作者：
Pengfei Fu;Lingyun Hou;Z. Ren;Zhen Zhang;Xiaofang Mao;Yusong Yu
影响因子：
4.7
作者：
Mahulkar, Amit V.;Marin, Guy B.;Heynderickx, Geraldine J.
通讯作者：
Heynderickx, Geraldine J.
影响因子：
4.3
作者：
Assael, MJ;Kakosimos, K;Wakeham, WA
通讯作者：
Wakeham, WA
影响因子：
1.9
作者：
M. King
通讯作者：
M. King