火箭煤油传递特性分子动力学模拟研究  

Molecular Dynamics Simulation Study of Rocket Kerosene Transfer Characteristics

作　　者：单世群[1] 冯弦 杜宗罡[1] 吴峰[2] 田靓 于忻立 邢钢[1] SHAN Shiqun;FENG Xian;DU Zonggang;WU Feng;TIAN Liang;YU Xinli;XING Gang(Xi’an Aerospace Propulsion Test Technique Institute,Xi’an Shaanxi 710100,China;School of Chemical Engineering,Northwest University,Xi’an Shaanxi 710069,China)

机构地区：[1]西安航天动力试验技术研究所,陕西西安710100 [2]西北大学化工学院,陕西西安710069

出　　处：《当代化工》2024年第7期1659-1663,共5页Contemporary Chemical Industry

摘　　要：针对火箭煤油中添加减阻剂后导致对流换热系数减小、传热效果减弱问题,从微观尺度研究纳米颗粒的加入对火箭煤油黏度和导热系数的影响关系。通过分子动力学(MD)模拟方法,采用Green-Kubo方程的平衡分子动力学(EMD)模拟对火箭煤油传热规律进行系统研究。模拟常温下(T=303K)加入传热增强剂纳米颗粒后的火箭煤油黏度与传热特性。以纳米颗粒质量分数与纳米颗粒粒径为变量,对纳米流体的导热强化规律进行研究,在此基础上将导热油与碳氢燃料分别加入减阻火箭煤油中并与纳米流体的黏度与导热系数进行比较,模拟结果表明增加纳米颗粒质量分数可使粒子间距离减小,加强了粒子间的相互作用以及热传递过程,可有效增加流体黏度和导热系数。In response to the problem of reduced convective heat transfer coefficient and weakened heat transfer effect caused by the addition of drag reducing agents in rocket kerosene,the influence of the addition of nanoparticles on the viscosity and thermal conductivity of rocket kerosene was studied at the micro scale.The heat transfer law of rocket kerosene was simulated and analyzed by means of equilibrium molecular dynamics(EMD) simulation of Green-Kubo equation through molecular dynamics(MD) simulation method.The viscosity and heat transfer characteristics of rocket kerosene at room temperature(T=303 K) after adding heat transfer enhancer nanoparticles were simulated.Taking the mass fraction and particle size of nanoparticles as variables,the heat conduction enhancement law of nanofluid was studied.On this basis,heat conduction oil and hydrocarbon fuel were added into drag reduction rocket kerosene respectively,and compared with the viscosity and thermal conductivity of nanofluid.The simulation results indicated that increasing the mass fraction of nanoparticles could reduce the distance between particles,strengthen the interaction and heat transfer process between particles,and effectively increase fluid viscosity and thermal conductivity.

关 键 词：火箭煤油 纳米颗粒 分子模拟 传热规律 

分 类 号：TQ517[化学工程]