THE LONGSHOT FREE-PISTON CYCLE. PART I. THEORY.

Abstract

An approximate analytical solution is presented for the free-piston cycle in the VKI Longshot Hypersonic Tunnel. The Longshot differs from a conventional gun tunnel in that a heavy piston is used to compress the nitrogen test gas, which is then trapped at the end of the barrel at very high pressure by the closing of a system of check valves as the piston rebounds. Real gas effects are accounted for by assuming that the nitrogen behaves as a Van der Waals gas with variable specific heats. (Author)

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1968
Accession Number
AD0697170

Entities

People

  • Claudio Parazzoli
  • Kurt R. Enkenhus

Organizations

  • von Kármán Institute for Fluid Dynamics

Tags

DTIC Thesaurus Topics

  • Check Valves
  • High Pressure
  • Nitrogen
  • Specific Heat
  • Valves

Fields of Study

  • Physics

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Fluid Mechanics and Fluid Dynamics.
  • ballistics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow