Influence of Inclination of Bluff Body in Flowmeters
Yaoying Lin, Volker Hans
Abstract:
This paper studies a factor which might influence the Strouhal number, that is, the inclination of the bluff body. The inclination of the bluff body happens in flow industry when the bluff body is inclined relative to its pipe parallel axis. Triangular bluff bodies are thoroughly discussed in this paper. Normally, the flat side is facing the inflow which is called conventional setup. It is turned around with 180 degrees facing the sharp side to the inflow, which is called unconventional setup in this paper. The inclination of bluff body has different influences in each setup. This paper shows that the flowmeter with bluff body in conventional setup makes lower Strouhal number but has more robustness to the inclination. On the contrary, it makes higher Strouhal number but less robustness. With fixed width, the different length of the triangular bluff body also causes influence to the Strouhal. In addition, the inclination of a rectangular plate bluff body is studied.
