Experimental Investigation of the Vortex Flow around an Axisymmetric Body with the Five-Hole Probe and Hot Wire Probe [post]

amir farajollahi, Mojtaba Dehghan Manshadi, Kazem Hejranfar
2020 unpublished
Anaxisymmetric body experiences the vertical flow around itself at incidence angle. If the adverse pressure gradient is significant, the boundary layers separated and a vortex is formed. The flow over a submarine at AOA (angle of attack) has specified separation of boundary layer and large vortex structures around the body. This flow influences body drag, acoustic and maneuverability. A propermethod to decrease and control the impacts of this separated flowis to use vortex generator. The
more » ... nerator. The mainobjective of the present study is to investigate the flow field around a Suboff model with applying the vortex generator by using the hot wire and five-hole probe in 0° ≤ α ≤ 20° angles of attack. The novelty of present study is application of two experimental method, (hot wire probe and five-hole probe) which can help to precisely study the structure of three-dimensional vortical flow field, the boundary layer velocity profiles and probability of the separation on the model with and without existence of vortex generator. The results indicate that vortex generators significantly decrease cross-flow separation, the size of vortices and the vortical flow.
doi:10.21203/rs.3.rs-29492/v1 fatcat:jmnsjxzkzrfk3e6rw76lux6wqq