Analyses on Ground-based Results of Evaporation-convection Box Experiment Prepared for SJ-10 Satellite

SJ-10 evaporation-convection experiment is designed to investigate the coupling mechanism and instability of the droplet evaporation and the convection driven by surface tension, during the process of evaporation phase changing when the droplet is deposited on a heated substrate. The heat transfer of evaporation and the evaporation surface non-equilibrium effect are mutually affected by heat conduction, buoyancy convection and the convection driven by surface tension. On the ground, heat conduction and buoyancy convection both play a leading role, but in the space, buoyancy convection will disappear and the thermal capillary convection rules. To make a contrast with space experiment, the scientific matching test under on-orbit working condition was completed with evaporation-convection box and the scientific data, engineering parameters and experiment images were obtained. At the same time, the ground research results were analyzed, and knowledge of the changing pattern of droplet morphology as well as those of temperature, heat flux, evaporation rate and evaporation flux, was acquired. Finally, according to the results of the experiment, the heat and mass transfer regularity of fluid phase-changing interface on which the mass exchange is happening, is analyzed.