化工学报Issue(9)：3323-3330,8.DOI:10.3969/j.issn.0438-1157.2014.09.003
微型流化床内混合特性的数值模拟
Numerical simulation of mixing characteristics of trace sample and bed material in micro fluidized bed reaction analyzer
摘要
Abstract
The micro fluidized bed reaction analyzer (MFBRA) developed by Institute of Process Engineering, Chinese Academy of Sciences has isothermal differential characteristics and is suitable for gas-solids fast reaction analysis, including the measurement of reaction rate and kinetic parameters. The instantaneously intensive particle mixing between trace sample in milligrams and high-temperature fluidized material is the essential condition to keep isothermal differential characteristics of the micro fluidized bed reactor. Therefore a three-dimensional numerical simulation based on the Eulerian multi-fluid model was performed for the micro fluidized bed connected with different gas jet structures. The instantaneous flow structures and quantitative mixing characterizations for different injector structures and locations were obtained. Experiments were conducted through measurements using high speed camera to capture the instantaneous solids flow pictures in the bed. Comparison revealed good qualitative agreement between experiment and simulation. The simulation results suggested that the injector should avoid the bending angle that confronted the injected gas with the fluidizing gas or left the trace sample in the injector.关键词
微型流化床/混合/喷口结构/数值模拟/优化Key words
micro fluidized bed/mixing/injector structure/numerical simulation/optimization分类
化学化工引用本文复制引用
杨旭,刘雅宁,余剑,蒋富明,韩永生,许光文,葛蔚..微型流化床内混合特性的数值模拟[J].化工学报,2014,(9):3323-3330,8.基金项目
国家自然科学基金项目（21306201，21225628，21106156）；国家重大科学仪器专项（2011YQ120039）。@@@@supported by the National Natural Science Foundation of China (21306201,21225628,21106156) and the National Instrumentation Grant (2011YQ120039) （21306201,21225628,21106156）
