第40卷(2018)第3期
性能与排放
柴油机 Diesel Engine
液态燃料跨/超临界喷射研究进展
王圳"2，吕田"，潘卫明"2，兰健"2
Vol. 40(2018) No. 3
（1.七一一研究所，上海201108；2.上海热气机工程技术研究中心，上海201203）
摘要：对国内外近年关于液态燃料跨/超临界喷射的实验及数值模拟研究进行综述和分析。分析表明：超临界作为一种不可规避的工况，其喷射具有完全不同于亚临界喷射的特性，气液界面消失，液滴和液丝等结构由高密度流体团代替，成为一个由漓流支配的无相变的扩散过程。现有研究多是对跨/超临界喷射现象的观测与描述，对该现象产生的机理及其对燃烧的影响尚不明确。采用传统喷雾模型进行超临界喷射仿真，得到的结果与实验现象有很大误差；采用真实流体状态方程所进行的仿真可大幅减小这个误差，但结果仍不理想。指出：跨/超临界喷射对燃烧稳定性的影响是航空航天领域的研究方向，而内燃机领域则更关注跨/超临界喷射对短暂雾化过程以及燃烧效率的影响。
关键词：跨/超临界；液态燃料；喷射
中图分类号：TK401
文献标识码：A
文章编号：1001-4357(2018)03-0010-07
ResearchDevelopment ofLiquidFuelCross/Supercritical Injection
Wang Zhen'-2,Lyu Tian', Pan Weiming'2, Lan Jian'-2
(1. Shanghai Marine Diesel Engine Research Institute, Shanghai 201108;
2. Shanghai Heat Engine Engineering Technology Research Center, Shanghai 201203)
Abstract: The experiments and numerical simulations of liquid fuel cross/supercritical injection carried out in recent years are reviewed and analyzed. The analysis result indicates that supercritical conditon as a kind of unavoidable condition, the characteristics of its spraying is completely different from the subcrit ical spraying. The gas-liquid interface disappeared and the liquid droplets and filaments are replaced by high density liquid mass, forming a diffusion process dominated by turbulence with no phase transition. Previous research was more focused on the observation and description of cross/supercritical spray phe nomenon, the detailed mechanism of this phenomenon and its effect on combustion were unclear. The re-sults of spray simulation at supercritical condition using traditional spray model has a great error compa-ring with the results of the experimental phenomenon. The error can be reduced significantly by using the real fluid equation of state, but the results are still unsatisfactory. Across/supercritical spray effect on combustion stability is the research direction in the field of aerospace, and the field of internal combustion engine is more concemed with cross/supercritical spray for short atomization process and the influence of combustion efficiency
Key words:across/supercritical;liquid fuel; spray 收稿日期：2017-09-19；修回日期：2018-03-08
基金项目：上海市科委资助项目（项目编号：16QB1402600）。
作者筒介：王划（1991-），男，研究生，主要研究方向为液态燃料超临界喷射特性，18817555785@163.0m。