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Numerical investigation of pulverized coal jet flame characteristics under different oxy-fuel conditions

机译：不同含氧燃料条件下煤粉喷射火焰特性的数值研究

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摘要

Pulverized coal combustion in mixture of oxygen and recycled flue gasses, known as oxy-fuel combustion, is considered as one of the several possible alternatives to conventional pulverized coal combustion. Switching from conventional pulverized-coal combustion to oxy-fuel combustion brings significant changes in flame properties among which the most important are ignition properties and flame stability. This paper presents the results of experimental and numerical analysis of ignition phenomena under O_2/ CO_2 mixtures with different oxygen content. The main focus of the presented paper is to suggest novel ignition sub-model which can describe all possible ignition mechanisms. Proposed ignition sub-model together with Large Eddy Simulation (LES) turbulence modeling enables accurate prediction of main flame characteristics: ignition point position, ignition temperature, and flame stability.
机译：在氧气和循环烟气的混合物中进行粉煤燃烧，被称为氧燃料燃烧，被认为是常规粉煤燃烧的几种可能的替代方法之一。从传统的粉煤燃烧转换为含氧燃料燃烧带来了火焰特性的重大变化，其中最重要的是着火特性和火焰稳定性。本文给出了不同氧含量的O_2 / CO_2混合气下点火现象的实验和数值分析结果。本文的主要重点是提出新颖的点火子模型，该子模型可以描述所有可能的点火机制。拟议的点火子模型与大涡流模拟（LES）湍流模型一起可以准确预测主要火焰特征：点火点位置，点火温度和火焰稳定性。

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  • 作者

    Rastko Jovanovic; Bosko Rasuo; Predrag Stefanovic; Dejan Cvetinovic; Bartosz Swiatkowski;

  • 作者单位

    Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences "Vinca", University of Belgrade, MikeAlasa 12-14, Belgrade, Republic of Serbia;

    Mechanical Faculty, Aerospace Department, University of Belgrade, Kraljice Marije 16, Belgrade, Republic of Serbia;

    Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences "Vinca", University of Belgrade, MikeAlasa 12-14, Belgrade, Republic of Serbia;

    Laboratory for Thermal Engineering and Energy, Institute of Nuclear Sciences "Vinca", University of Belgrade, MikeAlasa 12-14, Belgrade, Republic of Serbia;

    Institute of Power Engineering, Thermal Processes Department, Augustowka 36, Warsaw, Poland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Pulverized coal; Combustion; Oxy-fuel; CFD modeling; Oxy-combustion;

    机译：煤粉燃烧;含氧燃料CFD建模;氧燃烧;

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