A MOLECULAR DYNAMICS INVESTIGATION ON FUEL VAPORIZATION AND MIXING CHARACTERISTICS UNDER SUB/SUPERCRITICAL CONDITIONS

被引：1

作者：

Wei, Wu ^{[1
]}

Zhou, Tingyu ^{[1
]}

Zhao, Lun ^{[2
,3
]}

Deng, Lei ^{[4
]}

Xie, Maozhao ^{[4
]}

机构：

[1] Guizhou Univ, Sch Mech Engn, Guiyang, Peoples R China

[2] Shenzhen Polytechn, Inst Intelligent Mfg Technol, Shenzhen, Peoples R China

[3] Chinese Acad Sci, Shenzhen Inst Adv Technol, Shenzhen, Peoples R China

[4] Dalian Univ Technol, Sch Energy & Power Engn, Dalian, Peoples R China

来源：

THERMAL SCIENCE | 2022年 / 26卷 / 4B期

基金：

中国国家自然科学基金;

关键词：

molecular dynamics simulation; pressure effect; mixing layer; vaporization and mixing characteristics; DROPLET VAPORIZATION; SUPERCRITICAL VAPORIZATION; COMBUSTION PROCESSES; COMPUTER-SIMULATION; CRYOGENIC INJECTION; NANOJET INJECTION; LIQUID; ENVIRONMENTS; EVAPORATION; STREAMS;

D O I：

10.2298/TSCI210201335W

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Molecular dynamics simulation is performed to study the influence of environmental pressure on the mixing process. Based on the OPLS-AA full-atomic potential function, the gas-liquid-gas simulation box model is used to study the evaporation characteristics of n-heptane at different environmental conditions. The results show that compared with the subcritical environment, the nitrogen molecules in the supercritical condition can diffuse into the liquid phase region earlier, and the temperature of the liquid phase rise faster, and then a unified supercritical fluid could be formed. Based on the density profile, a gas-liquid-gas interface thickness is defined and the interface thickness is widened as the ambient pressure increase, resulting in the conventional subcritical evaporation transition turbulent mixing process.

引用

页码：3517 / 3527

页数：11

共 40 条

[1] REVIEW OF SUPERCRITICAL CO2 POWER CYCLE TECHNOLOGY AND CURRENT STATUS OF RESEARCH AND DEVELOPMENT [J].