Liquid-Vapor Flow Regime Transitions for Spacecraft Heat Transfer Loops

Abstract

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.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1988
Accession Number
ADA207892

Entities

People

  • Thomas W. Lovell

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Aircrafts
  • Buoyancy
  • Chemistry
  • Computational Science
  • Energy Transfer
  • Fluid Dynamics
  • Fluid Flow
  • Froude Number
  • Heat Energy
  • Heat Transfer
  • Latent Heat
  • Measurement
  • Spacecraft
  • Surface Tension
  • Three Dimensional
  • Transitions
  • Two Dimensional

Fields of Study

  • Chemistry
  • Environmental science

Readers

  • Combustion and Flow Dynamics.
  • Systems Analysis and Design

Technology Areas

  • Space
  • Space - Hall-Effect Thruster