SPACE FLIGHT SYSTEMS RADIOISOTOPE POWER SYSTEMS PROGRAM OFFICE NATIONAL CENTER FOR SPACE EXPLORATION RESEARCH EXTERNAL PARTNERS EDUCATION/OUTREACH SPACE EXPLORATION BENEFITS PROGRAM SUPPORT IMAGE GALLERY


ISS RESEARCH PROJECT LINKS

GRC MICROGRAVITY & TECHNOLOGY FLIGHT EXPERIMENTS


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Flow Boiling and Condensation Experiment (FBCE)


Objectives:

• Obtain flow boiling database in a long-duration microgravity environment

• Obtain flow condensation database in a long-duration microgravity environment

• Develop an experimentally validated, mechanistic model for microgravity flow boiling critical heat flux (CHF) and dimensionless criteria to predict minimum flow velocity required to ensure gravity-independent CHF

• Develop an experimentally validated, mechanistic model for microgravity annular condensation and dimensionless criteria to predict minimum flow velocity required to ensure gravity-independent annular condensation; also develop correlations for other condensation regimes in microgravity


  aircraft   flowboiling  
 
(a)
 
(b)
 


(a) Purdue parabolic flight flow boiling apparatus.  (b) Photos of flow boiling of FC-72 along bottom heated wall at 0.25 m/s observed in microgravity on parabolic flight



Relevance/Impact:

• Reduced gravity condensation and flow boiling heat transfer data and models are virtually nonexistent.

• Long-duration space missions will demand additional power and heat dissipation requirements compared to current space missions.  To reduce size and weight, the transition from single-phase to two-phase thermal management systems is necessary.

• In addition, two-phase thermal management systems are more effective heat transfer systems compared to single-phase systems because two-phase systems rely on latent heat exchange rather than sensible heat exchange.

• Flow boiling and condensation data in microgravity are also needed to validate numerical simulation tools that could be used to design space-based two-phase thermal management systems.



Development Approach:

• Develop two-phase flow loop to condition dielectric coolant FC-72 (or normal perfluorohexane (C6F14), pure constituent in FC-72) to preset values of flow rate, pressure, and temperature to the test module

• Develop Flow Boiling Module (FBM) to study subcooled and saturated flow boiling and critical heat flux (CHF)

• Develop two separate Condensation Modules to enable study of condensation flow and heat transfer regimes: Condensation Module (CM1) for heat transfer measurements and Condensation Module (CM2) for flow visualization

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Schematic of proposed ISS Integrated Flow Boiling and Condensation Facility




Contacts at NASA Glenn Research Center
Project Manager:  Nancy Rebel Hall, NASA GRC
nancy.r.hall@nasa.gov
216-433-5643

Project Scientist:  David Chao, NASA GRC
david.f.chao@nasa.gov
216-433-8320

Principal Investigator:  Issam Mudawar, Purdue University

Co-Principal Investigator:  Mohammad Mojibul Hasan, NASA GRC
mohammad.m.hasan@nasa.gov
216-977-7494

Engineering Team:  GRC Engineering

 

Flow Boiling and Condensation Experiment News