Bubble nucleation, micro-explosion and residue formation in superheated jatropha oil droplet: The phenomena of vapor plume and vapor cloud
Bubble nucleation, micro-explosion and residue formation in superheated jatropha oil droplet: The phenomena of vapor plume and vapor cloud
复制标题
过热麻风树油滴中的气泡成核、微爆炸和残留物形成：蒸气羽流和蒸气云现象
DOI：
10.1016/j.fuel.2019.116431
复制
发表时间：
2020-02
期刊：
影响因子：
7.4
通讯作者：
Wang Tengfei
中科院分区：
文献类型：
--
作者：
Wang Jigang;Qiao Xinqi;Ju Dehao;Sun Chunhua;Wang Tengfei
The evaporation and secondary atomization of droplets in cylinder has been confirmed to be one of major factors determining combustion efficiency. Experiments were carried out to elucidate the bubble nucleation and micro-explosion characteristics of superheated jatropha oil (JO) droplet during evaporation process at 873, 973, 1073 K and atmospheric pressure. A single droplet was placed at the intersection of two quartz fiber and introduced rapidly into a high temperature chamber. Several interesting features such as bubble nucleation, bubble growth and coalescence, puffing, vapor jetting, droplet jetting, surface pit, floating raft and micro-explosion were observed. Two different types of micro-explosion, namely global and local micro-explosion were identified. It was also found that chemical reactions occurred during the evaporation process of JO droplet. Bubbles in JO droplet were produced partly by superheating of low boiling point fatty acid and partly by pyrolysis of long-chain fatty acids. There were four modes of bubble nucleation in JO droplet: surface pit nucleation, particle-droplet interface nucleation, fiber-droplet interface nucleation, and floating raft interface nucleation. Surface pit nucleation and floating raft interface nucleation were the main mode. The evaporation residue formed at the end of evaporation, which was caused by the polymerization and aromatization reactions. Most importantly, vapor plume and vapor cloud induced by evaporation have been discovered for the first time. Vapor loud was very similar to the liquid state in the dilute spray region. These were mainly due to the non-isothermal condensation caused by Stefan outflow.
登录
查看更多内容
苄基叠氮化物-十六烷混合物双组分液滴高温蒸发特性
影响因子：
7.4
作者：
Geng Fu;Fujun Zhang;Siping Pang;Yuchuan Li
通讯作者：
Yuchuan Li
DOI：
10.1016/j.ijheatmasstransfer.2017.11.092
发表时间：
2018-03
影响因子：
5.2
作者：
A. Harikrishnan;Purbarun Dhar
通讯作者：
A. Harikrishnan;Purbarun Dhar
影响因子：
3.2
作者：
A. Daïf;M. Bouaziz;X. Chesneau;A. Cherif
通讯作者：
A. Daïf;M. Bouaziz;X. Chesneau;A. Cherif
影响因子：
5.2
作者：
A. B. Nadykto;E. R. Shchukin;M. Kulmala;K. Lehtinen;A. Laaksonen
通讯作者：
A. B. Nadykto;E. R. Shchukin;M. Kulmala;K. Lehtinen;A. Laaksonen
影响因子：
4.4
作者：
Ching-hua Wang;X. Q. Liu;C. Law
通讯作者：
Ching-hua Wang;X. Q. Liu;C. Law