摘要
基于Beer-Lambert定律,采用γ射线吸收法,研制了高参数火箭煤油密度测量装置,对液态及超临界压力下火箭煤油的密度进行测量方法研究。测量温度范围293~673 K,压力范围0.3~30 MPa,密度测量结果的扩展相对不确定度为2.2%~3.2%(置信因子k=2)。选取常压、温度293 K和压力5 MPa、温度673 K的环己烷分别作为高密度和低密度标准流体,抵消了温度变化对测量装置射线吸收率的影响。通过对环己烷和甲苯密度测量的校验,验证了测量方法的可靠性和准确性。在此基础上,完成了石油基和煤基火箭煤油的密度测量,并计算了石油基和煤基火箭煤油等压热膨胀系数。利用实验数据,拟合了宽广温度压力范围内两种火箭煤油密度的Tait函数关系式,密度实验数据与方程的平均绝对偏差为0.21%,最大绝对偏差为1.32%。测量结果表明:在所测量的温度和压力范围内,煤基煤油与石油基煤油的密度值基本一致。所得密度实验测量数据为高参数火箭煤油物性及传热等研究提供了基础数据。
Based on the Beer-Lambert law,the densities of rocket kerosene were measured by aγ-ray absorption method under liquid-state or supercritical pressure conditions.The measurement temperature ranged from 293 K to 673 K and the measured pressure from 0.3 MPa to 30 MPa.The extended relative uncertainties of the measured densities were identified as 2.2%—3.2%(coverage factor k=2).The cyclohexane at normal pressure and temperature of 293 K was selected as the high-density standard fluid,and the cyclohexane at the pressure of 5 MPa and the temperature of 673 K was selected as the low-density standard fluid to offset the impact of temperature changes on the radiation absorption rate of the measuring device.The reliability and accuracy of the measurement method was verified by calibrating the density measurements of cyclohexane and toluene.On this basis,density measurements of petroleum-based and coal-based rocket kerosene were performed and the isobaric coefficients of thermal expansion of petroleum-based and coal-based rocket kerosene were calculated.The experimental data were used to fit the Tait functional equation for the density of the two types of rocket kerosene over a wide range of temperature and pressure,and the average absolute deviation of the experimental density data from the equation was 0.21%,with a maximum absolute deviation of 1.32%.The results show that the densities of coal-based kerosene are basically identical with the petroleum-based kerosene at the measured conditions,the densities of high-energy kerosene are slightly higher than those of petroleum-based kerosene at low temperatures and lower than those of petroleum-based kerosene at high temperatures.The experimental density measurements in this paper provide fundamental data for the study of high-parameter rocket kerosene physical properties and heat transfer.
作者
李沛奇
陈雪娇
武博翔
蒋榕培
杨超
刘朝晖
LI Peiqi;CHEN Xuejiao;WU Boxiang;JIANG Rongpei;YANG Chao;LIU Zhaohui(State Key Laboratory of Multiphase Flow in Power Engineering,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China;Beijing Key Laboratory of Research and Application for Aerospace Green Propellants,Beijing Institute of Aerospace Testing Technology,Beijing 100074,China;Xi’an Aerospace Propulsion Test Technique Institute,Xi’an 710100,Shaanxi,China)
出处
《化工学报》
EI
CSCD
北大核心
2024年第7期2422-2432,共11页
CIESC Journal
基金
国家自然科学基金项目(51776167)。
关键词
碳氢化合物
燃料
煤基煤油
石油基煤油
射线法
密度
测量
hydrocarbons
fuels
coal-based kerosene
petroleum-based kerosene
radiometric method
density
measurement
