Design Manual for Two-Phase Components of Spacecraft Thermal Management Systems

This design manual presents methods to design and model the performance of key two-phase components in thermal management systems for spacecraft. Components for both capillary- and mechanically-pumped loops are modelled including: forced-convection evaporators, droplet evaporators; two- phase transp...

Full description

Saved in:
Bibliographic Details
Main Authors: Crowley, Christopher J, Izenson, Michael G, Barry, James J, Martin, Jerry L, Ent, Rebecca S
Format: Report
Language:English
Subjects:
CALCULATIONS
CALCULATORS
CAPILLARY CONDENSERS
CAPILLARY TUBES
COMPUTER CODE
COMPUTER PROGRAMS
COMPUTER SOFTWARE
COMPUTERS
CONDENSERS(LIQUEFIERS)
EVAPORATORS
FISCAL YEAR 93
Fluid Mechanics
FLUID PROPERTIES
FORTRAN
HEAT PIPES
HEAT TRANSFER
LOOPS
MANUALS
MATHEMATICAL MODELS
MICROGRAVITY
NUCLEATE BOILING
SBI1
SPACE TECHNOLOGY
SPACECRAFT
SPACECRAFT COMPONENTS
SPACECRAFT THERMAL MANAGEMENT SYSTEM
Thermodynamics
TWO PHASE FLOW
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This design manual presents methods to design and model the performance of key two-phase components in thermal management systems for spacecraft. Components for both capillary- and mechanically-pumped loops are modelled including: forced-convection evaporators, droplet evaporators; two- phase transport lines, fittings, and tees; shear condensers; capillary condensers; and mechanical pumps. Heat pipe condensers are also included. The methods can be used for component design and sizing, analysis of component performance in system or component development tests, development and evaluation of analytical models for key phenomena, and integration with transient codes for system analysis. This manual describes in detail the analysis methods which have been used to produce software for component design. The software and methods are validated against experimental data whenever such data are available. When possible, simple design maps are presented for initial scoping calculations for sizing two-phase components. The basic analytical approach for these design methods is mechanistic, so that the mathematical models for component behavior are based upon the fundamental physics. Thus the methods include inherent scaling with gravity, physical size, and fluid properties. This approach allows the models to be easily upgraded as new experimental data become available and includes the ability to assess the analytical uncertainty in design calculations. SBI, AD-E201 325