Computer modeling of coal gasification reactors. Quarterly technical progress report, October 1, 1976--December 31, 1976. [41 refs]

Technical Report · Tue Feb 01 04:00:00 EST 1977

DOI:https://doi.org/10.2172/7141603· OSTI ID:7141603

Blake, T. R.

This was the second quarter in the second year of research to develop and apply computer codes, based upon continuum theories of multiphase flows, to the performance of fluidized bed and entrained flow coal gasification reactors. Research was active in several areas. The research on the fluidized bed computer code included the development of the models for the heterogeneous and homogeneous reactions appropriate to char combustion and the incorporation of that chemistry into source and transport terms for the conservation equations. These source terms will be included in the numerical model in the next quarter. The basic numerical code was modified to reduce computer core requirements and to thereby permit the calculation of problems with a large number of zones. Parametric calculations were performed with this code to represent the influences of bed geometry, mass flow rate and distribution and hydrostatic pressure effects in fluidized beds. The work on the entrained flow computer model involved both the formulation of the basic conservation equations and the development of a computer code to test possible numerical techniques appropriate for that system of conservation equations. These conservation equations represent turbulent compressible flow of gas and solid particles, including the influence of chemical reactions. Constitutive equations for these turbulent flows are being formulated. The computer code is a finite element-finite difference code which treats a system of equations mathematically like that for entrained flow and it is being used to investigate the application of finite element techniques to the computer modeling of such flows.

• Research Organization: Systems, Science and Software, La Jolla, CA (USA)
• OSTI ID: 7141603
• Report Number(s): FE-1770-23; SSS-R-77-3145
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
CHARS
CHEMICAL REACTIONS
CHEMICAL REACTORS
COAL GASIFICATION PLANTS
COMBUSTION
COMPRESSIBLE FLOW
COMPUTER CALCULATIONS
COMPUTER CODES
ENTRAINMENT
FLUID FLOW
FLUIDIZED BED
INDUSTRIAL PLANTS
MATHEMATICAL MODELS
MODIFICATIONS
OXIDATION
RESEARCH PROGRAMS
THERMOCHEMICAL PROCESSES
TURBULENT FLOW
VISCOSITY