Amirkabir University of Technology Amirkabir Journal of Mechanical Engineering 2008-6032 53 Issue 1 (Special Issue) 2021 03 21 Experimental Investigation on Flow Downstream of a Triangular Bluff Body at Different Angles Experimental Investigation on Flow Downstream of a Triangular Bluff Body at Different Angles 427 436 3763 10.22060/mej.2020.16547.6387 FA Ehsan Ardekani Engineering Department, Mechanical Engineering, Ferdowsi University, Mashhad Alireza Teymourtash null Mohammad Ali Ardakani Journal Article 2019 06 12 <strong>Study of vortex shedding and flow downstream of a triangular bluff body can be used to design a device for measuring the flow angle, a vortex flowmeter or to calibrate the hot-wire anemometer at low velocities. In this paper, flow velocity, turbulence intensity, and vortex shedding from a 10 mm triangular bluff body have been investigated experimentally using hot-wire anemometer. Results show that the flow angle has little effect on flow velocity distribution and turbulence intensity. However, variations of Strouhal number (<em>St</em>) with respect to the flow angle is large, so that Strouhal number at flow angle of 20 ° has the maximum value of 0.23 and at the angle of 62 °, it has the minimum value of 0.133. To calibrate the hot-wire anemometer, it is necessary to measure flow velocity in addition to the measurement of vortex shedding. Under this condition, if the probe is placed in the region: <em>x/a</em>=2.5 and 2.5<<em>y/a</em><5.2, vortex intensity will be less than 6%, the velocity will be equal to the free stream velocity, and the vortices will be measurable</strong>. <strong>Study of vortex shedding and flow downstream of a triangular bluff body can be used to design a device for measuring the flow angle, a vortex flowmeter or to calibrate the hot-wire anemometer at low velocities. In this paper, flow velocity, turbulence intensity, and vortex shedding from a 10 mm triangular bluff body have been investigated experimentally using hot-wire anemometer. Results show that the flow angle has little effect on flow velocity distribution and turbulence intensity. However, variations of Strouhal number (<em>St</em>) with respect to the flow angle is large, so that Strouhal number at flow angle of 20 ° has the maximum value of 0.23 and at the angle of 62 °, it has the minimum value of 0.133. To calibrate the hot-wire anemometer, it is necessary to measure flow velocity in addition to the measurement of vortex shedding. Under this condition, if the probe is placed in the region: <em>x/a</em>=2.5 and 2.5<<em>y/a</em><5.2, vortex intensity will be less than 6%, the velocity will be equal to the free stream velocity, and the vortices will be measurable</strong>. https://mej.aut.ac.ir/article_3763_8fada0b143a2ebe80dde3052e46f0b3f.pdf