Flow Measurements Technique Using Hot Wire Anemometry
Reducing the drag inside the wall-bounded flows by the application of bio-inspired riblet surfaceshas been obtained through the passive flow control method.The primary intention of building this wind tunnel is to obtain the main fundaments of flow measurement using hot wire anemometry and to determine skin friction coefficient (Cf) for the smooth and riblet surface. This research paper is focused on the main relationship between the riblet features and the turbulent boundary layer structure which can be obtained from the surfaces in engineering applications. The main facility of the experimental work which areconsidered, hotwire and velocity profile of a turbulent BLare employed to measure the skin friction for two flat plates, smooth surface and riblet surface plates. Microsoft Excel is used to get the calculation and graphing the result.Particularly, the polynomial method iscalculated from the spreadsheet features to do the calibration. Thetesting of the wind tunnel and the practical results found that the riblet surface givesskin friction surface (Cf) value less than smooth surface which will affect on the drag reduction.