摘要
为了测定吸热碳氢燃料在不同温度条件下的总吸热量(热沉),以便于对吸热碳氢燃料进行筛选,研制了一套适合于高温下热沉测量的实验装置。该装置主要由进样计量、载气输送、加热控温、反应量热和产物分析五部分组成。对反应管轴向温度分布进行了测定,实验装置的工作温度范围在500℃-900℃,各温度下恒温区域长达440 mm,恒温区内温度梯度不大于3℃;利用电能标定的方法测定了装置的量热常数,并用纯物质(N2)作为样品对装置的准确度进行了校准,求解仪器量热常数的工作曲线的线性相关系数在0.999 7以上,氮气热沉测定值与理论值基本吻合,表明该装置测定结果可靠、测量准确度高,装置的设计符合T ian’s方程,可用于吸热碳氢燃料热沉的实验测定,为吸热碳氢燃料的研究提供了较可靠的热化学数据。
In order to measure total endothermic quantity （heat sink） of endothermic hydrocarbon fuels at different temperature, a set of high temperature calorimeter for heat sink measurement of endothermic fuels is developed. The apparatus consists of five sections ： sample micro-pump, carrier, heating ＆ temperature-controlling system, reaction ＆ calorimetry system and products analysis system. The axial temperature distribution of reactor is measured. Working temperature of the apparatus is at the range of 500℃ - 900℃. Constant temperature extent at different working temperature reaches 440 mm. And temperature gradient within constant temperature extent is less than 3 ℃. The thermal constant for the apparatus at different temperature is determined through an electric-heating method. Calibration is also carried out with the heat sink of nitrogen. The linear correlation coefficients of working curves used to calculate thermal constants are above 0. 9997. Besides, the metrical heat sink of nitrogen by using this apparatus is almost agreement with its theoretical heat sink, which corroborates the correct functioning and high measurement accuracy of the apparatus. The design of apparatus accords with T ian＇s equation. It is shown that this apparatus is suitable for experimental measurement of heat sink for endothermic fuels and can provide reliable thermochemistry data for the research of endothermic hydrocarbon fuels.
出处
《宇航计测技术》
CSCD
2007年第2期14-17,共4页
Journal of Astronautic Metrology and Measurement
基金
国家自然科学基金资助项目(编号:90305011)
关键词
热沉
吸热碳氢燃料
高温热量计
Heat sink Endothermic hydrocarbon fuel High temperature calorimeter
