A5037936204- Spacecraft and Cryogenic Technologies
- Heat Transfer and Boiling Studies
- Heat Transfer and Optimization
- Advanced Thermodynamic Systems and Engines
- Fluid Dynamics and Mixing
- Phase Equilibria and Thermodynamics
- Rocket and propulsion systems research
- Gas Dynamics and Kinetic Theory
- Heat transfer and supercritical fluids
- Tribology and Wear Analysis
- Hydrogen embrittlement and corrosion behaviors in metals
- Tribology and Lubrication Engineering
- Nuclear Engineering Thermal-Hydraulics
- Metallurgical Processes and Thermodynamics
- Gear and Bearing Dynamics Analysis
- Advanced Thermodynamics and Statistical Mechanics
- Planetary Science and Exploration
- Cyclone Separators and Fluid Dynamics
- High-Temperature Coating Behaviors
- Ranque-Hilsch vortex tube
- Corrosion Behavior and Inhibition
- Polymer Foaming and Composites
University of Wisconsin–Madison
2019-2024
University of Illinois Urbana-Champaign
2016-2019
Abstract The supercritical carbon dioxide (sCO2) Brayton cycle is an attractive thermal for compact power generation applications due to its high efficiency and density. Hydrodynamic gas journal bearings are this application their simplicity. Lubricating the with sCO2 from primary loop would be ideal, as eliminate need a separate lubricant source or complex seals pumps reduce bearing pressure below operating of loop. However, few studies in literature have examined behavior hydrodynamic...
NASA and other space agencies are currently planning the first human missions to Mars in next 20 years. These will require much more power than current robotic missions, so significant waste heat rejection capabilities maintain steady state operations. Forced convection exchangers, particularly crossflow tube array compact may offer volume- mass-efficiency benefits over radiators for these applications. However, no experimentally validated correlations exist literature pressure drop transfer...
A forced convection heat exchanger for waste rejection to the Martian atmosphere is designed based on existing transfer and pressure drop correlations low-Reynolds-number finned tube arrays. The design optimized determine mass-optimal geometry a range of candidate materials power loads. For 100 kW thermal load, optimal mass found be 27.0 kg frontal area 3.94 m2. This 95% less than comparable radiator only requires 638 W fan (or 0.6% output power) operate. Optimal geometries are also loads 1...