THE DESIGN AND OPTIMIZATION OF A NEW BLUFF BODY OF THE ELECTROMAGNETIC VORTEX FLOWMETER BASED ON ISIGHT

摘要

Bluff body plays a significant role in the electromagnetic vortex flowmeter. More reasonable structure and size of the bluff body can generate more strong and stable vortex shedding for the better sensor measurement. Currently, the optimization for the size of the bluff body is that dispersing the parameter interval and comparing the different size combinations by many researchers. In this method, the result may be the local optimum easily, and the process is same that the simulation is a waste of time for the vortex shedding in the different sizes of the bluff body more or less. However, a new kind of bluff body and an optimization method are proposed in this paper. By means of the NSGA-Ⅱ algorithm, the size of the bluff body is optimized in the ISIGHT software integrated of Gambit, Fluent and Excel in different Reynolds numbers conditions. At last, we obtained the reasonable size of the bluff body in a wide range of the Reynolds number (2.9×10~3～6×10~4).