Efficient and Noise Reduced Design of a Side Channel Blower Considering Psychoacoustic Evaluation Criteria
Commonly used turbo machines like axial fans or side channels blowers have a large impact on their environment: Large demand for electrical power and production of strong aeroacoustic sound sources, generating a significant noise emission, lead to a environmental footprint. The current work addresses both tasks: improvement of efficiency and reduction of noise emission. In this work a side channel blower is in the focus of the investigations. Since the noise emission of side channel blowers mainly occurs in the region of the stripper, pressure measurements on the blade surface are performed. The pressure trend during the blade passage along the stripper provides information on the exact location of and the contribution to the acoustic noise generation. Modifications of the stripper geometry with the objective of pressure drop linearization along the stripper are evaluated with respect to efficiency, pressure rise and noise reduction. All acoustic measurements are also evaluated with psychoacoustic quantities, like loudness and sharpness, to account for the human perception.
Jörg Franke and Sven Kreitlein
S. Münsterjohann et al., "Efficient and Noise Reduced Design of a Side Channel Blower Considering Psychoacoustic Evaluation Criteria", Applied Mechanics and Materials, Vol. 856, pp. 174-180, 2017