Radiative heat exchange among non-uniformly distributed, polydisperse, complex shaped, moving and reacting solid objects within DEM/CFD (B03)

DEM/CFD 中非均匀分布、多分散、复杂形状、移动和反应固体物体之间的辐射热交换 (B03)

• 批准号: 447185694
• 金额: --
• 依托单位: Lehrstuhl für Energieanlagen und Energieprozesstechnik
• 依托单位国家: 德国
• 项目类别: CRC/Transregios
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/447185694?language=en
• 关键词: Radiative; heat; exchange; among; non

B3 has the goal to develop models for radiative heat transfer in polydisperse packed beds flown through by a fluid. This includes the evaluation of a new concept which allows to consider radiative transfer from the freeboard (e.g. volatile flame above the fuel bed in grate firing systems), across the packing interface down to the direct radiative exchange prevailing within the dense bed, in a consistent and unified fashion. Radiation modelling will be based on the Discrete Ordinate Model (DOM) for the 3D thermal radiation intensities. The presence of the irregular dispersed solid will be implemented as a scale sensitive Immersed Boundary Method. In a very dense bed, a view factor based approach will be realised. For experimental verification a generic packed bed configuration with simplified particle geometries (cylinders) will be set up, which allows to measure the spectrally resolved propagation of radiation.

B3的目标是开发流体流过的多分散填充床中的辐射传热模型。这包括一个新的概念，允许考虑辐射传输从稀相区（如挥发性火焰以上的燃料床在炉排燃烧系统），通过填料界面下到直接辐射交换内的密集床，在一个一致的和统一的方式。辐射建模将基于3D热辐射强度的离散纵坐标模型（DOM）。不规则分散固体的存在将作为尺度敏感浸没边界方法来实现。在非常致密的床中，将实现基于视角因子的方法。为了进行实验验证，将建立具有简化颗粒几何形状（圆柱体）的通用填充床配置，这允许测量辐射的光谱分辨传播。