Construction of a New Concept on Instabilities of Imperfectly-Mixed Reactors

本研究从实验和理论两方面探讨了化学与流体动力复杂系统之间非线性耦合的影响。采用连续泰勒涡流反应器（简称TVFR）作为不完全混合的复杂流动系统。采用Belousov-Zhabotinskii反应（简称B-Z反应）作为具有自催化基本过程的复杂反应体系。(1) tfr的流动不稳定性和分岔：Taylor涡旋的不稳定性取决于滞回在低雷诺数时如何达到稳态，而在高雷诺数时对滞回的依赖性减弱。(2) B-Z反应在TVFR中的不稳定性和分岔：连续流系统作为试验装置由CSTR和TVFR组成。从CSTR流出的污水通过改变流量作为进料进入TVFR。进气条件为单周期时出现不规则扰动，进气条件为动态平衡时未发现明显的不规则扰动。利用Oregonator反应模型，采用“耦合映射点阵法”进行数值模拟，成功地定性描述了时空振荡模式。

This research dealt experimentally and theoretically with the effect of coupling of nonlinearities between chemical and fluid dynamic complex systems. A continuous Taylor vortex flow reactor (abbreviated TVFR) was utilized as a complex flow system imperfectly mixed. Belousov-Zhabotinskii reaction (abbreviated B-Z reaction) was adopted as a complex reaction system with autocatalytic elementary processes.(1) Flow Instabilities and Bifurcation of TVFR : THe instabilities of Taylor vortex flow depend on the hysteresis how to attain a steady state at low Reynolds numbers, whereas the dependency on the hysteresis becomes weak at high Reynolds numbers.(2) Instabilities and Bifurcation of B-Z reaction in TVFR : The continuous flow system as the test apparatus consists of a CSTR followed by a TVFR.The effluent from the CSTR was supplied as the feed into the TVFR by varying the flow rate. There appeared irregular disturbances when the inlet condition of the TVFR was singly-periodic, whereas no remarkable irregularity could be found when the inlet condition was in dynamical equilibrium. The spatio-temporal oscillation patterns were successfully described qualitatively by a numerical simulation based on "Coupled Map Lattice Method" using an Oregonator reaction model.