高黏度流体药浆离心混合过程温度仿真与实验OA

In the mixing process of solid propellant preparation,centrifugal mixing equipment achieves efficient blending of components through a combined rotational motion of the container's self-rotation and orbital rotation,forming a high-viscosity fluid slurry.To reveal the temperature change patterns dominated by viscous dissipation during mixing,a finite element analysis model was established using ANSYS Fluent,taking tri-component esterified polypropylene glycol(HTPB)propellant as an example.Static temperature was used as the observation index to study the effects of orbital rotation speed N and the ratio i between self-rotation and orbital rotation speeds on propellant temperature.Results show that the temperature of HTPB propellant exhibits a strong linear correlation with mixing time(r2>0.98),which can be effectively characterized by the average temperature rise ΔT over 10 seconds during mixing.Increasing both orbital and self-rotation speeds leads to higher propellant temperatures,with orbital rotation speed having a more significant impact.When i=-1,increasing the orbital speed from 300 r/min to 600 r/min results in a ΔT of approximately 1.89℃,significantly higher than the 0.72℃increase caused by the same increment in self-rotation speed(at N=600 r/min).Propellant temperature is slightly higher under co-directional rotation compared to counter-directional rotation.The minimum simulated temperature rise ΔT occurs at i=-0.5,corresponding to the highest safety level during the mixing process.