CAJ | 학술논문

为了增强普通螺旋管的混合效率，在普通的螺旋管结构中引入突放突缩结构，设计制造出缩放螺旋混合器。以竞争串连反应的离集指数为指标，对缩放螺旋混合器的结构进行了优化设计，考察了缩放螺旋混合器的几何参数——混合单元数、粗细段长度比、螺距、曲率半径以及 Reynolds 数对混合器的混合效率的影响。结果表明：缩放螺旋混合器的粗细段长度比为1/4，曲率半径为10.5 mm，混合单元数为40，Reynolds数在1000～1575时混合效率最佳；参数优化后的缩放螺旋混合器比普通螺旋管混合器以及具有缩放结构的直管混合器中的混合效率更高。
위료증강보통라선관적혼합효솔，재보통적라선관결구중인입돌방돌축결구，설계제조출축방라선혼합기。이경쟁천련반응적리집지수위지표，대축방라선혼합기적결구진행료우화설계，고찰료축방라선혼합기적궤하삼수——혼합단원수、조세단장도비、라거、곡솔반경이급 Reynolds 수대혼합기적혼합효솔적영향。결과표명：축방라선혼합기적조세단장도비위1/4，곡솔반경위10.5 mm，혼합단원수위40，Reynolds수재1000～1575시혼합효솔최가；삼수우화후적축방라선혼합기비보통라선관혼합기이급구유축방결구적직관혼합기중적혼합효솔경고。
A helical mixer with contraction-expansion connections combines helical pipes and sudden expansion and contraction array, which was optimally designed in this paper for enhancing the mixing in the regular helical mixer. The effect of the number of mixed elements, the pitch and curvature, the ratio of the lengths of contraction part to expansion part and Reynolds number on the mixing efficiency of the contraction-expansion helical mixer, was experimentally investigated by use of a fast competitive-consecutive diazo coupling reaction. It is found that: the radius of curvature of the helical mixer, ratio of the lengths of the contraction part to expansion part and the Reynolds number affect significantly the mixing efficiency, while the pitch of helical mixer had little influence. The best mixing performance is achieved by the contraction-expansion helical mixer with the radius of the curvatureR=10.5 mm, the ratio of the lengths of contraction part to expansion part 4:1, the numbers of mixed elements 40 in the ranges of Reynolds number from 1000 to 1575. The mixing efficiency of the optimized contraction-expansion helical mixer is superior in comparison to both of the regular helical mixer and contraction-expansion straight mixer.