CAJ | 학술논문

采用CFD方法模拟了具有相同桨径、不同桨叶折角和叶宽结构的6种新型搪玻璃搅拌桨的搅拌特性。考察了挡板、桨叶离底高度对釜内流场的影响，基于此分析了桨叶折角、叶宽对速度分布的影响。对模拟得到的搅拌功率和混合时间进行了实验验证，并与传统搪玻璃桨式搅拌器进行比较。结果表明：①新型桨叶在加挡板且桨叶离底高度为450 mm时，搅拌效果最佳；②随桨叶折角、叶宽的增大，桨叶区轴向、径向和切向速度均呈增大趋势，当桨叶折角为45°、叶宽为95 mm时，釜内混合效果最好；③随转速增大，搅拌功率呈增大趋势，混合时间呈减小趋势，新型桨明显比传统桨混合性能好，桨叶折角为30°、叶宽95 mm时功率消耗最低，桨叶折角为35°、叶宽95 mm时混合时间最短。
채용CFD방법모의료구유상동장경、불동장협절각화협관결구적6충신형당파리교반장적교반특성。고찰료당판、장협리저고도대부내류장적영향，기우차분석료장협절각、협관대속도분포적영향。대모의득도적교반공솔화혼합시간진행료실험험증，병여전통당파리장식교반기진행비교。결과표명：①신형장협재가당판차장협리저고도위450 mm시，교반효과최가；②수장협절각、협관적증대，장협구축향、경향화절향속도균정증대추세，당장협절각위45°、협관위95 mm시，부내혼합효과최호；③수전속증대，교반공솔정증대추세，혼합시간정감소추세，신형장명현비전통장혼합성능호，장협절각위30°、협관95 mm시공솔소모최저，장협절각위35°、협관95 mm시혼합시간최단。
This paper used CFD as the simulation method in the investigation of the mixing characteristics of six new types of glass-lined agitators,with the same diameter and different blade angles and blade widths. This research analyzed the effects of baffle and impeller off-bottom-distance on the fluid flow field,and the effects of blade angle and blade width on velocity field. The experimental results of stirring power and mixing time agreed well with the simulation. Comparison with traditional glass-lined pitch blade agitator was also investigated. The results showed that the following:①The stirring effect was optimal with added baffle and the impeller off-bottom-distance was 450 mm;②When blade angle and width increased,axial,radial and tangential velocities increased accordingly,and the mixing effect was optimal when the blade width was 95 mm and blade angle was 45 °;③When the rotational speed increased , the stirring power increased and mixing time decreased. The power consumption was lowest when the blade width was 95 mm and blade angle was 30°;the mixing time was shortest when the blade width was 95 mm and blade angle was 35°. The mixing characteristics of new type of impellers were better than the traditional impellers.