شماره ركورد كنفرانس :
4518
عنوان مقاله :
Experimental Study on the Effect of Oscillation on Turbulent Air Flow through a Ninety Degree Bend
Author/Authors :
Elham Ameri Department of Chemical Engineering, Shahreza Branch, Islamic Azad University, Shahreza,Iran
كليدواژه :
Oscillation , Bend , Velocity , Air flow , Turbulent
عنوان كنفرانس :
The 7th International Chemical Engineering Congress & Exhibition (IChEC 2011
چكيده لاتين :
Turbulent air flow through a ninety degree bend under external low frequencies of 1.5 and 3 Hz
was investigated experimentally by using Hot Wire Anemometer. The bend had a diameter of 106
mm and a curvature radius ratio of 6.0 with long, straight upstream and, downstream pipes. In the
experimental study, The Measurements were performed for air flow rate with the bulk mean
velocity of 10.97 m/s that corresponds to Reynolds number of 31200, for the standpoints of radial
and axial velocity. In the Inlet plane of the bend due to the pressure gradient generated in the
longitudinal direction of the bend, the Maximum velocity appeared toward the inner wall of the
bend. The Maximum velocity was seen off-center at the inlet plane of the bend, showing the strong
effect of bend downstream. At the outlet plane of the bend the velocity profile flattened due to
extra mixing induced in the flow by oscillation.