TY - JOUR
TI - Effect of stresses acting on impeller blades
AU - Bogrekci Ismail
AU - Demircioglu Pinar
AU - Sert Berkay
AU - Gogebakan Ahmet
AU - Abbakar Mujtaba
JN - Thermal Science
PY - 2023
VL - 27
IS - 4
SP - 3113
EP - 3121
PT - Article
AB - This paper examines the impact of temperature, pressure, and blade thickness  on the stresses experienced by impeller blades during operation. The  impeller is subject to a range of stresses arising from thermal, fluid, and  mechanical factors that can cause deformation if they exceed certain  thresholds. The study focuses on an impeller supplied by HAUS Centrifuge  Technologies, which suffered damage while operating at 33000 rpm. Six blade  thickness offsets, ranging from 0.05 mm to 0.15 mm, were analyzed  structurally, and the Von-Mises stresses were compared to the impeller  material yield strength. The impeller with the lowest stress, at 197.43  MPa, was chosen for fluid-structure interaction analysis. The impeller was  then manufactured and tested for performance using ISO 5389 standard in HAUS  test facility. The CFD results indicated that the polytropic efficiency of  the thickened impeller increased to 86.57%, compared to the original  impeller polytropic efficiency of 75.8%. However, the volumetric flow  decreased from 4211.3 m3 per hour to 3658.3 m3 per hour when using "the  thicker impeller". The data collected supports the conclusion that an  increase in blade thick-ness can help to reduce the stresses acting on the  blade.