TRANSPIRATION COOLING WITH CHEMICAL REACTIONS,

Abstract

Transpiration coolant requirements are examined for gas/solid systems in which the thermal effects of chemical reactions must be taken into account. For example, a coolant may undergo phase change and chemical decomposition in passage through the wall itself. This would alter the effective heat absorption capability and the mean molecular weight of the effluent gas. Further chemical reaction may occur when the coolant vapors (or decomposition products) mix with the hot gases in the boundary layer. In general, both processes will influence the amount of coolant required to maintain a prescribed surface temperature, and therefore significantly alter the relative merits of possible coolants. As such, thermochemical effects are of great practical interest. Simple computational techniques and numerical examples are given herein, together with a discussion of several factors governing the rates of these chemical reactions. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1964
Accession Number
AD0429355

Entities

People

  • Daniel E. Rosner

Tags

DTIC Thesaurus Topics

  • Absorption
  • Boundaries
  • Boundary Layer
  • Chemical Reactions
  • Decomposition
  • Gases
  • Hot Gases
  • Layers
  • Molecular Weight
  • Surface Temperature

Readers

  • Combustion and Flow Dynamics.
  • Combustion science or combustion engineering.
  • Systems Analysis and Design