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Steady Two-Phase Flow in a Reduced Gravity Environment

Steady Two-Phase Flow in a Reduced Gravity Environment

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Steady Two-Phase Flow in a Reduced Gravity Environment

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  1. Steady Two-Phase Flow in a Reduced Gravity Environment Portland State University Microgravity Team Albert Sitorus, Michael Bacich, Michael Severson, Jamie Kelso, and Megan Sala

  2. NASA’s Reduced Gravity Student Flight Opportunities Program Spring 2002: Notification of Program Summer 2002: Development of 1g test, Benchmarking Oct. 2002: Proposal to NASA Dec. 2002: Acceptance into the Program Jan. 2003: TEDP Deadline March 2003: Trip to Johnson Space Center Present: Analysis of Results

  3. Applications • Thermal control systems • Power cycles • Storage of fuels, propellants and cryogens • Life support systems • Waste water treatment and recycling • Fluids management

  4. FlowRegimes Bubbly Slug Annular http://microgravity.grc.nasa.gov/6712/2phase_flow/2phase.html

  5. Slug Flow • Points of Interest: • Steady-State Velocities • Deposition Rates • Slug Volumes

  6. Behavior in Reduced Gravity http://microgravity.grc.nasa.gov/school/gallery.htm

  7. Previous Two Phase Experiments Rousset B. Two-phase visualization at cryogenic temperature, 2000

  8. Closed Circuit Loop • Terrestrial Design • Simple • Affordable • Small • Achieve Steady-State

  9. Benchmarking

  10. Reduced Gravity Apparatus

  11. Test Equipment Data Package (TEDP) • Strict Safety Requirements • Structural Analysis • 9g Forward • 6g Downward • Impact • Hazard Analysis • Electrical Analysis • Size and Weight

  12. Test Facility

  13. Flight Pattern

  14. Reduced Gravity Flights

  15. Reduced Gravity Experiment

  16. Reduced Gravity Conclusions -Achieved Steady State -Design passed Test Readiness Review -Withstood loading conditions -Operated successfully Design Changes -Experiment size -Camera Resolution -Motors and Controllers

  17. Special Recognition • NASA’s Reduced Gravity Student Opportunity Program • The Oregon Space Grant Program • Mark Weislogel • Portland State University’s College of Engineering and Computer Science • FMC Allen Machinery • Chehalem Machine Works • Infinity Images