Accession Number:

ADP012367

Title:

Numerical Analysis of the 10 Bar Mascotte Flow Field

Descriptive Note:

Corporate Author:

OFFICE NATIONAL D'ETUDES ET DE RECHERCHES AEROSPATIALES CHATILLON-SOUS-BAGNEUX (FRANCE)

Report Date:

2001-03-01

Pagination or Media Count:

11.0

Abstract:

Numerical simulations of the 10 bar Mascotte flow field performed using the ONERA MSD code have been presented. Droplets were injected along the liquid core represented by a solid cone. Only one class of droplets was injected which diameter was estimated from experimental data. Both kinetic and turbulence models were tested. The turbulent CLE model was found to be the most promising model for these computations. The flame was found to be anchored to the LOX post tip as observed experimentally. Comparison with CARS data indicate a good agreement in the recirculation zone where temperature is relatively low with high hydrogen concentration. A relatively good agreement is observed on the radial profiles and axial profiles. The flame length could be estimated between 180 and 200 mm. The flame development could be observed on temperature field and also on intermediate radial profiles of temperature. It seems that the flame does not expand very much compared to the observed data as OH imaging for instance. Temperature on the axis remains low as far as 100 mm downstream indicating a poor mixing in that region. Improvements could be searched for by considering a more realistic distribution with more drop sizes, effect of droplets on turbulence level, and other processes such as secondary atomisation and coalescence. Of course, atomisation is one of the crucial points of this kind of computations as it constitutes the boundary condition for oxygen injection. More representative models have to be developed and used.

Subject Categories:

  • Numerical Mathematics
  • Fluid Mechanics
  • Liquid Propellant Rocket Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE