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
Key words
Rocket kerosene/Nanoparticles/Molecular simulation/Heat transfer mechanism
维普
万方数据