OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
Fig. 1: Shape of turbine blade 6030 cascade model
First of all a 2D model was created and then this 2-D model was converted into 3-D by sweeping the faces of the 2-D
model by blade height. Flow is assumed to be symmetric about the mid span plane. After creating the desired volume
which is subjected to fluid flow meshing of the same is done
Fig. 2: 3-D meshing near the leading edge of blade 6030
2.3 Boundary and Operating Conditions
The atmospheric temperature is assumed to be constant at 27 °C, in experiment performed by Samsher [16] it varied from
20°C to 35 °C. The velocity at the inlet is given as 102 m/s. The pressure outlet value at exit is assigned as zero gauge
pressure, as the exit is directly exposed to atmosphere. The exit measurement plane is at 15 % distance of chord distance.
Initially blade surfaces were kept smooth and results were obtained. In addition to these input conditions for study of
secondary flow loss, a roughness of 500µm was also applied on pressure and suction surfaces individually and then on both
the surfaces together to see the effect of roughness on secondary flow.
135