@article {Bamberger:2012:0736-2501:716, title = "Optimization of axial fans with highly swept blades with respect to losses and noise reduction", journal = "Noise Control Engineering Journal", parent_itemid = "infobike://ince/ncej", publishercode ="ince", year = "2012", volume = "60", number = "6", publication date ="2012-11-01T00:00:00", pages = "716-725", itemtype = "ARTICLE", issn = "0736-2501", url = "https://ince.publisher.ingentaconnect.com/content/ince/ncej/2012/00000060/00000006/art00007", doi = "doi:10.3397/1.3701043", keyword = "11.4.1, 21.6.3", author = "Bamberger, Konrad and Carolus, Thomas", abstract = "A low pressure axial fan with swept blades is optimized with respect to sound emission and efficiency. Noise is addressed by a modified sweep strategy. Regarding aerodynamics, geometrical parameters describing variations of the blade section and the hub contour are defined. The optimum in terms of maximal total-to-total fan efficiency at the design point is achieved by numerous CFD simulations embedded in the Simplex optimization method. Besides a moderate increase in efficiency at the design point, a remarkable extension of operating range is observed. The numerical results are successfully validated against experiment measurements. Acoustic measurements furthermore show a decrease in sound emission over the complete operating range.", }