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Large Eddy Simulation of a 660 MW Double-Reheat Ultra-Supercritical Boiler

机译：660 MW双再热超超临界锅炉的大涡模拟

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Computational fluid dynamics has been widely applied to the research and development activities of boilers. In recent years, LES has become a promising simulation tool when compared to RANS and DNS. LES directly solves the Navier-Stokes equation of large eddies and models small eddies which are less important for the main flow. Previous studies have showed that LES can well predict the pulverized coal jet flames. Due to the growth of renewable energy and frequent grid peak shaving, the low-load operation is required for the next-generation boilers such as double-reheat ultra-supercritical boilers. The turbulent and chemical processes in the boilers should be further investigated under a wide operating conditions. In this paper, a set of models used in LES was validated by a lab-scale burner. Then this simulation method was applied to a 660 MW double-reheat ultra-supercritical boiler. The results showed that LES could provide a deep understanding of flame ignition behaviors and pollutant formation mechanisms.
机译：计算流体动力学已被广泛应用于锅炉的研发活动中。近年来，与RANS和DNS相比，LES已成为一种有前途的仿真工具。 LES直接求解大涡流的Navier-Stokes方程，并对小涡流建模，这对于主流来说不太重要。先前的研究表明，LES可以很好地预测煤粉喷射的火焰。由于可再生能源的增长和频繁的电网调峰，下一代锅炉（如双再加热超超临界锅炉）需要低负荷运行。在广泛的运行条件下，应进一步研究锅炉中的湍流和化学过程。在本文中，通过实验室规模的燃烧器验证了LES中使用的一组模型。然后将该模拟方法应用于660 MW双再热超超临界锅炉。结果表明，LES可以深入了解火焰的点火行为和污染物形成机理。

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