AUTHORS: Esra H. Isik, Mustafa Sengul, I. Bedii Ozdemir
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ABSTRACT: In this paper, a family of six radial blowers with differently elevated rotor cones have been studied to examine the effect of the cone height on the blower performance. In the design process of the blower family, the airfoil type impellers were used (NACA 25010), and all other parameters; the inlet-outlet port angles, the number of impellers and the rotor-base diameter were kept constant. The blowers were run with a rotational speed of 9,000 rpm and exposed to the pressure loads from 3,000 to 12,000 Pa. Results show that increasing the ratio of the rotor cone-height to the cone-base diameter certainly has a future prospect to develop the performance of the radial blowers. In that, the blowers with elevated cones can withstand to very large pressure loads, which were unreachable by the flat blowers. However, it seems that beyond an optimum ratio, which appeared to be 0.378 in this investigation, the performance seems to drop.
KEYWORDS: Centrifugal fans, Computational fluid dynamics, Elevated conical rotor.
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