A Heat Transfer Model for a Heated Helium Airship

Abstract

Basic heat transfer empirical and analytic equations are applied to a double envelope airship concept which uses heated Helium in the inner envelope to augment and/or control gross lift. The convective and conductive terms lead to a linear system of five equations for the concept airship, with the nonlinear radiation terms included by an iterative solution process. A FORTRAN program, is used to perform the tedious calculations, and graphed results are obtained for the variables of interest. These indicate that the simple use of airship engine exhaust heat will give more than a 30% increase in gross airship lift. Possibly more than 100% increase can be achieved if a 'steam injection' heating system, with associated design problems, is used. (Theses)

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 1987
Accession Number
ADA183786

Entities

People

  • Ray M. Rapert

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Aeronautical Engineering
  • Aircrafts
  • Boundary Layer
  • Computer Programs
  • Convection
  • Engineering
  • Equations
  • Geometry
  • Heat Energy
  • Heat Loss
  • Heat Transfer
  • Heat Transfer Coefficients
  • Materials
  • Radiation
  • Thermal Conductivity
  • Thermodynamics
  • United States

Readers

  • Aerospace Engineering
  • Combustion and Flow Dynamics.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)