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. Flow Regimes BubblySlug 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 -Experiment size -Camera Resolution -Motors and Controllers Design Changes

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