ESTABLISHING TANK DESIGN CRITERIA FOR LIQUID HYDROGEN ROCKETS. VOLUME II. HEAT TRANSFER TO LIQUID HYDROGEN THROUGH CONDENSING AIR FILMS

Abstract

The heat transfer coefficients to an uninsulated copper plate at 20 K were investigated. Data were taken over a range of air velocities, normal to the surface, of 0 to 21 mph, absolute humidity ofAIR OF 25 TO 280 GRAINS LB OF DRY AIR, AND AMBIENT AIR TEMPERATURES OF 16 TO 150 F. A theoretical analysis, description of experimental apparatus and procedure, experimental results, discussion, conclusions, and recommendations are presented. The results are summarized as follows: (1) Low ambient temperatures and absolute humidities inhibit and sometimes prevent frost accumulation on the test surface; (2) Steady state frost thickness increases with air velocity and absolute humidity; (3) Heat transfer coefficients exhibit a minimum point at all air velocities when plotted against absolute humidity; (4) The only theoretical analysis made was for the surface covered with a liquid air film. No correlation between theory and experimental data was found to exist. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1961
Accession Number
AD0259122

Entities

People

  • D.a. Van Gundy

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Temperature
  • Coefficients
  • Design Criteria
  • Experimental Data
  • Heat Transfer
  • Heat Transfer Coefficients
  • Humidity
  • Hydrogen
  • Liquid Hydrogen
  • Steady State
  • Thickness

Readers

  • Combustion and Flow Dynamics.
  • Surface Coatings Technology.