Accession Number:

AD0787817

Title:

Einige Ergebnisse von Untersuchungen an Problemen der Super- und Hypersonischen Verbrennung (Some Results of Investigations of Problems of Super and Hypersonic Combustion),

Descriptive Note:

Corporate Author:

DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V PORZ-WAHN (WEST GERMANY)

Report Date:

1972-07-23

Pagination or Media Count:

29.0

Abstract:

Experimental and theoretical investigations of supersonic and hypersonic combustion processes are presently being carried out at the Institut fur Angewandte Gasdynamik of the DFVLR at Porz-Wahn. At supersonic Mach numbers external combustion is employed to generate aerodynamic side forces on a flat plate. Secondary air is injected normal to the main stream through a slot in the wall. Stable combustion in the recirculation region upstream of the slot is achieved by injecting hydrogen normal to the wall and initiating the combustion through a spark plug. At hypersonic Mach numbers the mixing process during the induction period is studied by injecting a foreign gas tangentially to the plate. In the mixing zone detailed measurements of static and stagnation pressures, total temperatures and concentration of the injected gas enable a clear picture of the flow behaviour. The experimental data obtained at hypersonic Mach numbers agree with results obtained by numerical integration of the boundary-layer equations for laminar flows. Complete flow field analysis can be obtained with this solution for chemically frozen flows and flows in chemical equilibrium approximated by a flame sheet.

Subject Categories:

  • Fluid Mechanics
  • Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE