Aiming at the flow instability problem occurring in the water-cooling wall of a supercritical circulating fluidized bed(CFB)boiler with annular furnace,ageneral calculation model based on the time-domain method was established for the analysis of flow instability in parallel channels.By employing first-order upwind scheme,the governing equations of mass,momentum and energy were discretized and solved,then the numerical computational program Dynsys was developed in Fortran language.The typical parallel chann...