The Effect on Wake Flow and Vortex Shedding Frequency by Vortex Stabilizer in Karman Vortex Type Air Flow Sensor

칼만와류식 공기유량센서의 와안정판이 후류유동장과 와유출주파수에 미치는 영향

An experimental study has been made to investigate the effect on wake flow and vortex shedding frequency by vortex stabilizer in Karman vortex type air flow sensor. The conditions investigated include 3 types of shapes and 3 types of separation distances of the vortex stabilizer. The phase averaged technique and smoke-wire flow visualization method are used to understand the detail information. The rolling up position of shear layer is fixed by the influence of the vortex stabilizer. Especially, the convex type vortex stabilizer has shown the more stable repeatability and linearity regarding the vortex shedding frequency compared to the other types.