摘要
为了根据燃烧室出口组分浓度计算燃气温度,采用牛顿法和赫夫法求解质量守恒方程、组分平衡方程、热离解方程和能量守恒方程等非线性方程组,计算出了考虑热离解与不考虑热离解时的燃气温度,并通过燃气分析法测温试验和热电偶测温试验对上述计算方法进行了验证。理论计算结果表明:随着温度的升高,燃气分析法计算的燃气温度在不考虑热离解时与考虑热离解时差距变大,当温度超过1800 K时,考虑热离解与不考虑热离解的温度差距超过10 K;当温度超过2300 K时,温度差距超过50 K;CO_(2)体积浓度对温度计算有重要影响,其测量精度是温度计算准确度的一个重要因素。试验验证结果表明:燃气分析法计算的燃气温度与热电偶测得的燃气温度大致相同,趋势基本一致。表明本文的燃气分析温度计算方法可靠,而且温度高时,应考虑热离解。
In order to calculate the gas temperature based on the gas components of combustor outlet,nonlinear equations such as mass conservation equation,component balance equation,thermal dissociation equation,and energy conservation equation were solved using Newton’s method and Herv’s method.The gas temperature with and without thermal dissociation was calculated,and the above calculation methods were verified through gas analysis temperature measurement experiments and thermocouple temperature measurement experiments.Theoretical calculation results show that as the temperature increases,difference of the gas temperature calculated by gas analysis method between without considering thermal dissociation and with considering thermal dissociation increases.When the temperature exceeds 1800 K,the temperature difference between considering thermal dissociation and without considering thermal dissociation exceeds 10 K,and when it exceeds 2300 K,the temperature difference exceeds 50 K.The volume concentration of CO_(2)has a significant impact on temperature calculation,and its measurement accuracy is an important factor for the accuracy of temperature calculation.The experimental verification results show that the gas temperature calculated by the gas analysis method is roughly the same as the gas temperature measured by the thermocouple,and the trend is basically consistent.This indicates that the gas analysis temperature calculation method in this article is reliable,and that the gas analysis method is a reliable high-temperature testing technique.Moreover,when the temperature is high,thermal dissociation should be considered.
作者
赵聪聪
陈志龙
张经纬
张译元
何敏
ZHAO Congcong;CHEN Zhilong;ZHANG Jingwei;ZHANG Yiyuan;HE Min(AECC Commercial Aero Engine Co.,Ltd,Shanghai 201306,China)
出处
《推进技术》
北大核心
2026年第2期174-181,共8页
Journal of Propulsion Technology
关键词
燃烧室
燃气分析法
燃气温度
非线性方程组
热离解
Combustor
Gas analysis method
Gas temperature
Nonlinear equation
Thermal dissociation
