摘要
为研究低温低压特殊环境下轻油燃烧器的火焰结构特性,运用燃烧学和喷雾学原理,以标准k-ε湍流模型、离散坐标辐射模型和平衡混合分数模型为燃烧单元本构模型,建立了具有圆筒形燃烧室的物理模型并进行计算分析。结果表明,当环境温度为273K,环境压力为0.1 MPa时,在不同截面处,燃烧室内的温度随着与燃烧头距离的增加而逐渐增大,截面处最高温度出现在火焰中心或边缘处;火焰最高温度随着外界温度、压力的降低而减小;火焰长度随着环境压力与温度的降低而增大。
In order to investigate the flame structural characteristics of light oil burner in low pressure and low temperature environment,aphysical model of throatless combustion chamber was established and numerical analysis was made based on the principles of combustion and atomization with the standard k-εturbulent model,the discrete ordinates radiation model and the equilibrium mixture-fraction model as the constitutive models of combustion unit.The results show that when the ambient temperature is 273 K and the ambient pressure is 0.1 MPa,the temperature at different cross sections in the combustion chamber increases gradually with the increase of distance from the combustion head and the highest temperature is found at the center or edge of the flame.The highest temperature of the flame decreases with the decrease of the temperature and pressure of the environment.But the flame length increases with the decrease of the temperature and pressure of the environment.
出处
《山东科技大学学报（自然科学版）》
CAS
北大核心
2018年第2期80-87,共8页
Journal of Shandong University of Science and Technology(Natural Science)
基金
国家重点研发计划项目(2017YFC0806300)
关键词
低温环境
低压环境
火焰温度
火焰长度
燃烧器
low temperature environment
low pressure environment
flame temperature
flame length
burner
