Experimental Studies on Shadow Shields for Thermal Protection of Cryogenic Tanks in Space

Abstract

Experiments were performed on multiple flat-disk shadow shields to determine the effects of shield spacing number, emissivity, lateral conductance, and targeting (high-emissivity coatings on annular rings of shields) on thermal performance. The experimental data, in general, agreed closely with an analytical model which assumed diffuse surfaces with nonuniform radiosity. A shadow-shield system for a hypothetical space vehicle was designed, scaled down, and tested. Results demonstrated: (1) a lightweight method of shield construction; (2) shield-support interactions: and (3) reduction of support heat leaks by shield location, attachment methods, and the use of high-emissivity coatings.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1968
Accession Number
ADA382173

Entities

People

  • Edward R. Bartoo
  • Richard H. Knoll

Organizations

  • National Aeronautics and Space Administration

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Elements
  • Equations
  • Finishes
  • Heat Energy
  • Heat Transfer
  • Instrumentation
  • Lead Wires
  • Materials Processing
  • Measurement
  • Reflectivity
  • Spacecraft
  • Surface Properties
  • Surface Temperature
  • Temperature Gradients
  • Test Facilities
  • Thermal Conductivity
  • Vacuum Chambers

Fields of Study

  • Physics

Readers

  • Computational Modeling and Simulation
  • Computer Vision.
  • Electrical Engineering

Technology Areas

  • Space
  • Space - Hall-Effect Thruster