Author : Gurdeep Singh Atwal and Sanjeev Kumar Dhama

The main aim of this paper is to analyse the stress variation on the blades of centrifugal compressor by varying two parameters i.e. number of blades and inlet velocity. Air is used as working fluid and material used for impellers is structural steel. The only boundary condition is that the inlet temperature is constant i.e.300k.The meshing used is tetrahedral meshing. The 3-D model of the blades was created in PRO-e and then the file was imported to ANSYS for further analysis. By increasing the number of blades and inlet velocity, pressure increases therefore the stress also increases. ANSYS fluent fluid flow application is used to import the pressure as it is the part of CFD. With the help of ANSYS fluent fluid flow and static structural application of ANSYS, Results were obtained for velocity contours, pressure contours, total deformation and equivalent stress values. With the help of Two-way analysis of variance (ANOVA) method, the significant percentage obtained with respect to the input velocities and number of blades. The best significant result comes to be in the case of input velocities (68%) and the significant percentage for number of blades is 28%. The error percentage is also very low.

Keywords: ANSYS, PRO-e, CFD, ANOVA, Compressor, Blade, Stress and Significant Percentage

Article published in International Journal of Current Engineering and Technology, Vol.5, No.3 (June-2015)