Accession Number:

ADA355895

Title:

Comparison of Soot Model Predictions with Experimental Data for a Turbulent Sooting Propane Jet Flame.

Descriptive Note:

Technical rept.

Corporate Author:

DEFENCE SCIENCE AND TECHNOLOGY ORGANISATION CANBERRA (AUSTRALIA)

Personal Author(s):

• Smith, Nigel S.

Report Date:

1998-08-01

Pagination or Media Count:

53.0

Abstract:

Simplified global reaction steps for soot particle formation, growth, oxidation and agglomeration have been incorporated into two separate models for turbulent nonpremixed combustion. The first of these models is a hybrid steady laminar flamelet SLF model which uses flamelet library data to determine the local rates of the aforementioned soot processes at various rates of strain and degrees of radiant heat loss. The second model employs the soot processes in a Conditional Moment Closure CMC method and solves for soot mass fraction and particle abundance concurrently with the determination of gas phase reactions and radiant heat loss. The predictions of these two models are compared with experimental data for a turbulent propane jet flame. It is found that the interdependence between the rate of soot processes and radiation losses is an integral feature of the modelling problem. In general, it was not possible to determine a universally appropriate set of soot process rates, due to the need to take differences in radiation heat loss submodels and turbulent combustion models into account.

Descriptors:

• *COMBUSTORS
• *GAS TURBINES
• *JET FLAMES
• HEAT TRANSFER
• EXPERIMENTAL DATA
• TURBULENCE
• VAPOR PHASES
• HYDROGEN
• STRAIN RATE
• AUSTRALIA
• HEAT LOSS

Subject Categories:

• Combustion and Ignition
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE