Accession Number : AD0752944

Title :   Zur Abschaetzung der Lebensdauer eines Verdampfenden Tropfens bei Verbrennung des Dampfes (Determination of the Life of an Evaporating Droplet in a Burning Vapor),

Corporate Author : DEUTSCHE FORSCHUNGS- UND VERSUCHSANSTALT FUER LUFT- UND RAUMFAHRT E V FREIBURG IM BREISGAU (WEST GERMANY)

Personal Author(s) : Adams,Ernest ; Schulz-Jander,Burkhard ; Spreuer,Herbert

Report Date : 12 FEB 1971

Pagination or Media Count : 8

Abstract : A lower bound ts of the life time of an evaporating droplet is determined. It is assumed that the droplet is at rest relative to its hot environment and that combustion of the vapor takes place in a moving front. In the paper a nomogram is determined which simplifies the computation of the bound ts. It is shown in an example that the upper bound for the evaporation coefficient, which follows from ts, exceeds experimental data by a factor between 2 and 3. Applications of this thermochemical and the preceding aerodynamic decay of a droplet are discussed for one flight state of the combustion chamber of a jet engine. (Author)

Descriptors :   (*JET ENGINE FUELS, COMBUSTION), JET ENGINES, COMBUSTION CHAMBERS, TRANSPORT PROPERTIES, BOUNDARY VALUE PROBLEMS, WEST GERMANY

Subject Categories : Combustion and Ignition
      Fuels

Distribution Statement : APPROVED FOR PUBLIC RELEASE