1
MSc, Islamic Azad University, Ayatollah Amoli Branch, Mazandaran, Iran
2
Islamic Azad University, Chalous Branch,
3
Aerospace Research Institute, Ministry of Science, Research and Technology
Abstract
Propellant Management Devices, or PMDs, are static all metal structures inside spacecraft propellant tanks that use surface tension to ensure gas free liquid delivery to the tank outlet. They can be made entirely from titanium allowing their use in the most corrosive propellants. With no moving or deforming parts, they are inherently reliable. Anyone who needs liquid access or liquid control in space. PMDs are found in many satellites, solar system probes, rockets, and the Space Shuttle. They are used mostly for propellants but can be used in water systems, thermal systems, cryogenic systems and, in fact, in any space bound liquid system. PMDs can be made completely from titanium (or from any suitable solid). This makes them compatible with any liquid and very lightweight - unlike the alternatives such as rubber bladders. Plus PMDs are much more reliable since they have no moving parts
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