EVAPORATIVE FILM COOLING AT HYPERSONIC VELOCITIES FOR RE-ENTRY VEHICLES

Abstract

A theoretical analysis of similarity parameters of evaporative film cooling was developed for blunt bodies indicating the effect of mass transfer on heat transfer and skin friction for Prandtl and Lewis numbers unity. Calculated interface temperatures are in good agreement with wall temperatures measured around a hemisphere in a hypersonic wind tunnel. Application of theANALYSIS SHOWS THAT EVAPORATIVE FILM COOLING IS FEASIBLE FOR TYPICAL RE-ENTRY VEHICLES. At circul r velocities the effective heat of evaporation of water i as high as 11,000 Btu/lbm. The significant advantage of evaporative film cooling is that the walls of a vehicle during re-entry are maintained at relatively low temperatures. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1961
Accession Number
AD0286173

Entities

People

  • Rudolf Hermann
  • W.l. Melnik

Organizations

  • University of Minnesota

Tags

DTIC Thesaurus Topics

  • Blunt Bodies
  • Bodies
  • Cooling
  • Film Cooling
  • Friction
  • Heat Energy
  • Heat Of Vaporization
  • Heat Transfer
  • Hypersonic Velocity
  • Hypersonic Wind Tunnels
  • Low Temperature
  • Mass Transfer
  • Skin Friction
  • Transition Temperature
  • Wind Tunnels

Fields of Study

  • Engineering

Readers

  • Combustion and Flow Dynamics.
  • Fluid Dynamics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow