Application of similarity scaling-up theory to structure design of mixer

作者：Chen, Ke-Juan^*; He, Min; Lin, Hui

来源：Journal of South China University of Technology(Natural Science Edition), 2009, 37(8): 35-38+44.

• Engineering design
• Geometric scaling
• Geometric similarity
• Geometric simulation
• Maximum shear stress
• Rheology theories
• Similarity criteria
• Single parameter

A geometric simulation and scaling-up model of mixer is established based on the geometric similarity, the constancy of maximum shear stress and the approximation of compound viscosity. By taking the similarity of compound quality as the design goal, four geometric scaling-up factors are then chosen and the similarity conditions between the model mixer and the actual one are presented in the form of similarity criteria. According to the similarity criteria and the rheology theory, a scaling-up model to simulate the mixer is proposed. Moreover, with the similarity scaling-up theory as a design platform, a model of 370L mixer is designed, which is finally compared with the prototype mixer (BB270) and the practical one (BB370). The results show that the modeled 370L mixer with a single-parameter error of less than 10.7% and a geometric parameter-group A error of less than 8% meets the requirements of engineering design well, and that the mixing quality of the modeled mixer is similar to that of the prototype one. Thus, the similarity scaling-up of mixer is successfully implemented.

• 出版日期2009-8
• 单位华南理工大学