An analytical solution for wall film heating and evaporation
发表时间：2019-03-11
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- 论文类型：
- 期刊论文
- 第一作者：
- Liu, Hong
- 通讯作者：
- Jia, M (reprint author), Dalian Univ Technol, Sch Energy & Power Engn, Minist Educ, Key Lab Ocean Energy Utilizat & Energy Conservat, Dalian 116024, Peoples R China.
- 合写作者：
- Yan, Yan'an,Jia, Ming,Zhang, Yanzhi,Xie, Maozhao,Yin, Hongchao
- 发表时间：
- 2017-10-01
- 发表刊物：
- INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
- 收录刊物：
- Scopus、SCIE、EI
- 文献类型：
- J
- 卷号：
- 87
- 页面范围：
- 125-131
- ISSN号：
- 0735-1933
- 关键字：
- Wall film; Evaporation; Analytical solution; Internal combustion engine
- 摘要：
- The evaporation of the fuel wall film considerably affects the performance and exhaust emissions of internal combustion engines. An analytical model for wall film heating and evaporation was developed and applied in this paper for predicting the temporal and spatial temperature distributions of the liquid film. The effects of the heat conduction between the fuel film and the wall, the convection between the film surface and the surrounding gas, and the film evaporation were taken into account in the present analytical model. This analytical solution was validated by the predictions from the discrete numerical vaporization model, and it is found that accurate predictions can be obtained by the present model. In order to understand the evolution behavior of the wall film, the influence of the wall temperature, the ambient pressure, and the initial film thickness were investigated. The results indicate that the evolution of the wall film evaporation can be divided into two distinct stages, i.e., an initial rapid heating stage and a slow cooling stage. The lifetime of the wall film can be shortened by increasing the wall temperature, decreasing the ambient pressure and the initial wall film thickness. The purpose of this work is to reproduce the transient behaviors of the wall film heating and evaporation with an analytical solution, which is easy to setup and solve.
- 是否译文：
- 否
