亚临界环境下煤油液滴燃烧特性仿真  

Numerical Investigation on Combustion Characteristic of Kerosene Droplet in Subcritical Environment

作　　者：吴海龙 聂万胜 郑直 何博 WU Hailong;NIE Wansheng;ZHENG Zhi;HE Bo(Aerospace Engineering University,Beijing 101416,China)

机构地区：[1]航天工程大学

出　　处：《兵器装备工程学报》2019年第8期180-184,共5页Journal of Ordnance Equipment Engineering

基　　金：国家自然科学基金项目(51876219)

摘　　要：基于PR状态方程、液滴表面气液平衡、流体热物性高压修正以及详细化学反应机理,建立了一维的全瞬态多组分液滴燃烧模型,对RP-3煤油液滴在亚临界环境下的燃烧特性进行了数值仿真。研究结果表明:在亚临界环境下,煤油液滴的燃烧过程与纯蒸发过程差异很大,煤油液滴表面各参数随时间的变化曲线在着火之后出现突变,液滴寿命大大减小;煤油液滴短暂蒸发之后着火燃烧,火焰温度快速上升,火焰半径逐渐增大,液滴燃烧后期,火焰半径减小,液滴燃烧末期,火焰温度垂直下降,火焰半径减小为零。Based on the PR state equation,gas-liquid equilibrium at droplet surface,the correction of thermal physical at high pressure and the detailed chemical reaction mechanism,it established a one-dimensional transient multicomponent droplet combustion model,and the combustion characteristic of RP-3 kerosene droplet under the subcritical conditions was researched by numerical simulation.The research shows that,in the subcritical environment,the combustion process of kerosene droplet is very different from that of pure evaporation process.The curve of the parameters on the kerosene droplet surface changes abruptly after ignition,and the droplet life is greatly reduced.After a briefly evaporation stage,the kerosene droplet ignites and burns,the flame temperature rises rapidly and the flame radius gradually increases.At the later stage of droplet combustion,the flame radius begins to decrease,and at the end stage of droplet combustion,the flame temperature drops vertically and the flame radius decreases to zero.

关 键 词：亚临界环境 煤油液滴 燃烧特性 数值仿真 详细化学反应机理 

分 类 号：TJ763[兵器科学与技术—武器系统与运用工程] V434[航空宇航科学与技术—航空宇航推进理论与工程]