刚柔组合搅拌桨强化流体混沌混合及放大规律研究

高效节能搅拌反应器的研发与应用有助于实现化工过程强化和节能减排，其突破点在于合理设计搅拌桨，发展混沌混合强化理论，掌握反应器的放大规律。传统刚性搅拌桨主要靠剪切作用向流体传递能量，在桨叶尖端附近区域形成隔离区，不利于高效节能混合。项目拟设计和优化刚柔组合桨，研究流固耦合运动强化流体混沌混合行为及放大规律；对比研究刚柔组合桨与刚性桨在能效、噪音、搅拌轴振动及桨叶磨蚀等方面的差异；研究刚柔组合桨搅拌反应器结构和操作参数与流体混沌特性（最大Lyapunov指数、混沌吸引子等）的相关性，重点研究刚柔组合桨强化流体节能混合机制及调控方法；采用ANSYS研究刚-柔-流耦合运动对跨尺度流场结构间能量传递的影响；结合信号处理、图像采集及计算模拟，研究节能、降噪、抗振、耐磨的原理及与搅拌反应器放大的关系；建立刚柔组合搅拌桨强化流体混沌混合的数理模型和操作方法。研究成果将为搅拌反应器的设计和放大提供理论支持。

Development and application of high performance stirred reactor contribute to chemical process intensification and energy saving and emission reduction, and the key is to rationally design the impeller, to develop fluid chaotic mixing intensification theory and to master scale-up law for mixing technology. For the traditional rigid impeller, energy transfer mainly depends on shearing action, and the isolated mixing region can be formed around the tip region of the impeller, which does harm to good mixing performance and energy saving. In the present proposal, the rigid-flexible combination impeller will be designed and optimized, and the intensified chaotic mixing performance by fluid structure interaction, as well as its scale-up law, will be studied in the stirred reactor. Comparative investigation will be carried out between rigid impeller and rigid-flexible combination impeller on energy efficiency, noise, vibration and abrasion during mixing process. Relationship will be studied between chaotic parameters (largest Lyapunov exponent, etc.) and stirred reactor structure as well as operation parameters. The study will be focused on fluid energy saving mixing performance of rigid-flexible combination impeller and its controlling methods. Influence of rigid-flexible-fluid coupling movement on energy transportation across scale in flow field will be studied with software ANSYS. Mechanisms energy efficiency, noise, shaft vibration, flow field structure, impeller corrosion and the relationships with the scale-up operation will be investigated, integrated with signal processing, imagine acquisition, and computational simulation. Mathematic model and operation methods will be established on intensified fluid chaotic mixing fluid with rigid-flexible combination impeller. Research fruits will supply the theoretic basis for design and scale-up for stirred reactor.