Abstract: Propellant acquisition vanes (PAV) are the key parts of vanetype surface tension tank (STT)，and its transportation performance of fluid will determine management ability of STT under microgravity environment.In present paper，a model test system is established.Based on experimental study of fluid transportation behavior of propellant on the PAV with different section forms conducted on microgravity drop tower，some important conclusions are obtained.According to experimental tests，PAV with different section forms influences the fluid transportation performance of STT remarkably.Thus，it is an effective way to control liquid transportation velocity by reasonably design of section form of PAV，and it used to supply pressurized hydrazine fuel to the spacecraft’s propulsion system thrusters.Present experimental results can not only provide a guideline for optimized design of newstyle vane type management assembly，but also present a new way for liquid control in space environment.

Key words: microgravity, propellant acquisition vanes, fluid management, drop tower test