Accession Number : ADA180619

Title :   Spray Computations in a Centerbody Combustor,

Descriptive Note : Rept. for Oct 85-Oct 86,

Corporate Author : CALIFORNIA UNIV IRVINE DEPT OF MECHANICAL ENGINEERING

Personal Author(s) : Raju,M. S. ; Sirignano,W. A.

Report Date : APR 1987

Pagination or Media Count : 13

Abstract : A hybrid Eulerian-Lagrangian method is employed to model the reactive flowfield of a centerbody combustor. The unsteady two-dimensional gas-phase equations are represented in Eulerian coordinates and liquid-phase equations are formulated in Lagrangian coordinates. The gas-phase equations based on the conservation of mass, momentum and energy are supplemented by turbulence and combustion models. The vaporization model takes into account the transient effects associated with the droplet heating and liquid-phase internal circulation. The integration scheme is based on the TEACH algorithm for gas-phase equations, the Runge-Kutta method for liquid-phase equations and linear interpolation between the two coordinate systems. The calculations show that the droplet penetration and recirculation characteristics are strongly influenced by the gas- and liquid-phase interaction in such a way that most of the vaporization process is confined to the wake region of the centerbody and thereby improving the flame stabilization properties of the flowfield. Keywords: Sprays; Combustion; Phase; Flow; Computations.

Descriptors :   *COMBUSTION, *REACTIVE GASES, *GAS DYNAMICS, *COMBUSTION STABILITY, *UNSTEADY FLOW, ALGORITHMS, MODELS, DROPS, FLAMES, STABILIZATION, INTEGRATION, INTERPOLATION, LINEARITY, INTERACTIONS, LIQUID PHASES, COMPUTATIONS, HEATING, FLOW FIELDS, COORDINATES, LAGRANGIAN FUNCTIONS, EQUATIONS, CIRCULATION, INTERNAL, TWO DIMENSIONAL FLOW, FUEL SPRAYS, MOMENTUM, RECIRCULATION, VAPORIZATION, REACTIVITIES, RUNGE KUTTA METHOD, TRANSIENTS, WAKE

Subject Categories : Combustion and Ignition

Distribution Statement : APPROVED FOR PUBLIC RELEASE