Detailed Model for Practical Pulverized Coal Furnaces and Gasifiers: Second Annual Progress Report for the Period 1 May 1986 to 30 April 1987

摘要

On May 1, 1985, work was initiated on a contract sponsored by a consortium of industrial and government agencies aimed at development of a practical, 3-D coal combustion model for utility and industrial furnaces and gasifiers. This report summarizes work conducted over the second year of this contract by task and includes only tasks worked on during this period. Emphasis was directed toward development of the fluid mechanics of the three-dimensional model, in the absence of particulates and reactions (GAS3D). This model element was coded, debugged and demonstrated for rectangular coordinates, and nearly completed for cylindrical coordinates. Solutions with GAS3D for limiting cases matched available two-dimensional solutions. A significant effort was made to identify and implement more efficient numerical methods for the three-dimensional code. Several differential equation solvers available in a standard format (ELLPACK) were reviewed and plans were made to evaluate these methods through computational comparisons. Further, multigridding strategies, which were reviewed and evaluated under separate funding, show significant promise for application to the 3-D code. Work to improve the robustness of the 2-D code (PCGC-2) when using the energy equation was nearly completed. Coal gasification and combustion solutions with PCGC-2 with the energy equation option were demonstrated. 131 refs., 39 figs., 6 tabs. (ERA citation 12:040405)