An Experimental research on wake behind airfoil Naca0012 under various angles

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TITLE

An Experimental research on wake behind airfoil Naca0012 under various angles

ABSTRACT

The aim of this article is investigation of the wake of an airfoil Naca0012 in the wind tunnel. The measurement has been done at different angles of attach of airfoil α= 0, 5, 10, 15 degrees and locate in test section of wind tunnel a turbulence maker net with intensity of 5% in the entrance of test section. The wind tunnel which is used in this experimental has area section of 1600 mm2 and 2000 mm length; with minimum free turbulence level less than 0.1% without any net and maximum speed is 30 m/s. For measuring favorite parameters in this test we apply hot wire anemometer, In this paper we focus on wake turbulence behind the airfoil in the angles of 0,5,10,15 degrees and in X/C=0,0.05,0.01,0.15,0.2(that X means distance behind airfoil and C means airfoil thickness). To comparison data wake results in a certain degree for various stations. On the other hand, in certain stations for various degrees, we tried our test in 20m/s velocity. From the diagram at the certain angles can conclude that on the certain angle whatever approach to the farther stations we have increasing on velocity and diagram goes to flatten. We can conclude from diagram at certain stations with increasing in angle the velocity is decrease. Also with increasing in angle the diagram of velocity shifts toward negative and with increasing of airfoil angle from station x/c = 0.5 to the next velocity defect increases

KEYWORDS

Wake- Experimental- wind tunnel- hot wire- airfoil Naca0012

REFERENCES

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Cite this paper

Mehdi.Banafi, Mehrdad.Banafi. (2017) An Experimental research on wake behind airfoil Naca0012 under various angles. International Journal of Theoretical and Applied Mechanics, 2, 164-169