Liquid-Vapor Flow Regime Transitions for Spacecraft Heat Transfer Loops
Final rept. May 1986-Jul 1988
AETA CORP PORTSMOUTH NH
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The major objective of this contract was to develop prediction criteria for microgravity vapor-liquid flow regime transitions. Extensive simulation experiments were conducted using equal density, immiscible liquids. Criteria were established for bubble to slug, slug to annular, and bubble to annular flow regime transitions. These criteria were based on minimum pressure drop considerations and a new analytical model for slug flow. Tentative pressure drop and heat transfer equations are recommended for flow conditions in two phase vapor liquid spacecraft based heating or cooling loops. Keywords Two phase fluid flow, Flow transitions, Microgravity fluid flow.
- Fluid Mechanics