Ph.D. Defense

Samuel Hart 

(Advisors: Dr. Lightsey and Dr. Romero-Calvo)

Thermoelectromagnetic Fluid Management in Microgravity

Friday, Nov. 8th 

11:00 a.m. 

MK-317

Abstract 

Modern microgravity fluid management is dominated by capillary systems, mechanical pumps, and positive expulsion devices such as bladders. These technologies, either singularly or in combination, are able to achieve the fluid management needs of most space missions. However, in the age of small spacecraft, increasing human spaceflight, and long-term space habitation, there is a desire for smaller, more reliable, and higher-performing fluid management systems. This research proposes and demonstrates the use of thermal phase change and electromagnetic devices to create improved fluid management technologies. The applications of these technologies range from propellant management and life support to heat transfer. This work first proposes several methods of phase separation for saturated or cryogenic fluids in conformal tanks using thermal, capillary, and electromagnetic means. The viability of a thermal phase change fluid management device is then demonstrated in laboratory tests, and the primary factors contributing to its performance are analyzed. Finally, electromagnetic forces are applied to dynamic fluid management in a small-scale cooling loop for spacecraft. An electromagnetic pump is developed and demonstrated in a benchtop prototype loop.

Committee

• Dr. E Glenn Lightsey – School of Aerospace Engineering (advisor)
• Dr. Álvaro Romero-Calvo – School of Aerospace Engineering (advisor)
• Dr. Brian Gunter – School of Aerospace Engineering
• Dr. Michael Schatz – School of Physics
• Dr. Terry Stevenson – Research Engineer, NASA Ames Research Center