103.Neutron Radiography and Numerical Simulation of Mixing Behavior in a Reactor for Supercritical Hydrothermal Synthesis
103.Neutron Radiography and Numerical Simulation of Mixing Behavior in a Reactor for Supercritical Hydrothermal Synthesis
复制标题
103.超临界水热合成反应器内混合行为的中子射线照相及数值模拟
作者：
K. Sugioka;K. Ozawa;S. Takami;T. Tsukada;T. Adschiri;K. Sugimoto;N. Takenaka;Y. Saito
利用中子射线照相技术，可视化了超临界水热合成纳米颗粒管流式反应器内温度和水密度的分布，并研究了反应器构型对反应器内混合行为的影响。本文采用三种反应器，观察了超临界水和室温水在T型结处的混合行为。结果表明，管流式反应器内温度和水密度的分布与管流式反应器的构型密切相关。此外，利用商业软件FLUENT进行了数值模拟，对反应堆内的流动形态和温度分布进行了详细的研究，结果表明，数值结果可以很好地解释中子射线照相的实验结果。©2013美国化学工程学会化学工程学报，60:1168-1175,2014
We have visualized the distributions of temperature and water density in a tubular flow reactor for supercritical hydrothermal synthesis of nanoparticles by neutron radiography, and investigated the effect of reactor configuration on the mixing behavior in the reactor. Here, three types of reactors were used, and the mixing behaviors of supercritical water and room‐temperature water at a T‐junction in the reactors were observed. As a result, it was revealed that the distributions of temperature and water density in the tubular flow reactors strongly depend on their configurations by neutron radiography. In addition, numerical simulations have been carried out to investigate the flow patterns and temperature distributions in the reactor in detail using the commercial software FLUENT, and it was demonstrated that the numerical results can explain the experimental results obtained by neutron radiography well. © 2013 American Institute of Chemical EngineersAIChE J, 60: 1168–1175, 2014