Parametric study and numerical analysis of the regenerative compressor with symmetric aerodynamic blades, to improve performance

علوم کاربردی و محاسباتی در مکانیک

Article 1, Volume 32, Issue 2 - Serial Number 24, 2021, Pages 1-18   

Document Type: Original Article

DOI: 10.22067/jacsm.2021.68281.1003

Author

Jafar Nejadali^*

Department of Mechanical engineering, University of Mazandaran, Babolsar, Iran

Abstract

Regenerative flow compressors or blowers are rotodynamic machines with the ability to produce high heads at low flow rates. They have performance curves with very stable features. By employing numerical simulation of fluid flow, the effect of using symmetric aerodynamic blades, the number of blades, and the height of the blades on the performance and efficiency of the compressor were analyzed. Due to the complexity of the flow pattern in this type of turbomachinery, the SST turbulence model has been applied. Dimensionless numbers have been used to present the results so that they can be generalized and archived. The results showed that reducing the blade height from 34 mm to 28 mm reduces the pressure ratio and also reduces efficiency. The study of the effect of the number of blades at the design point showed that the highest efficiency occurs in the pitch-to-chord ratio of 0.36. Based on the results of the study of aerodynamic blades with the same inlet and outlet angles, which were presented in five different angles of 20, 30, 40, 50, and 60 degrees, it was found that symmetric aerodynamic blades with an inlet/outlet angle of 46 degrees have the best performance.

Keywords

Regenerative flow compressor; Height of blades; Symmetric aero-foil blades; Pitch to chord ratio; CFD simulation

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