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- W2550524478 abstract "The state of the fluid not only changes with the working conditions, but also changes over time. The heat-flow processes are nonlinear, and the nonlinearity results mainly from the dependency of thermophysical properties of the fluid. As for the investigation of combustion characteristics, researchers tended to implement the simulation with boundary conditions of constant wall temperature, but these sources of wall temperature datum were mostly not pointed out [10]. The hydrodynamic characteristics of waterwalls play extremely important roles in reflecting the combustion characteristics. Moreover, the hybrid simulation of furnace combustion model and waterwall system is rare among all the references. Therefore, a hybrid simulation is carried out in this paper. In this paper, a nonlinear distributed mathematical model is applied for the analysis of the flow and heat transfer processes occurring in the waterwalls of the supercritical boiler [11]. The purpose of the numerical calculations is to determine the distributions of the fluid temperature and other corresponding thermal physical parameters. And then the obtained fluid temperature distribution is used as the boundary condition of the computational fluid dynamics (CFD) simulation which is implemented with Fluent 6.3. This paper studies both the fluid heat-flow characteristics of the waterwall and the furnace combustion processes, makes the hybrid collaborative simulation come true. This method overcomes the deficiency of previous researches with two isolated models and improves the accuracy and authenticity of the simulation results for boilers. II. DESCRIPTION OF THE OBJECT The object of the hybrid simulation is a 600MW supercritical unit with W-flame furnace of Dongfang Boiler Group Co. Ltd. The boiler, type of Dongfang DG1950/25.4- II8 is being used in Sichuan Gongxian, China. This type of boiler is designed for supercritical parameters with W-flame furnace and vertical waterwall pipes. In this paper, using the ratio of 1:1for the actual model and the calculation model. Due to the symmetry of the furnace structure, taking only a half of the furnace structure for investigation. The geometrical structure of the furnace and the main parameters are shown in Fig. 1 and Table 1, respectively." @default.
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- W2550524478 date "2014-01-01" @default.
- W2550524478 modified "2023-09-27" @default.
- W2550524478 title "Hybrid Simulation of Waterwall and Combustion Process for a 600 MW Supercritical Once-through Boiler" @default.
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