Abstract
We experimentally and computationally investigated aerodynamic performance and acoustic noise characteristics of a centrifugal blower in a narrow space. This blower had a wall near the suction side. The experimental results revealed that the pressure rise was lower and the noise level was higher than for a blower equipped in a free space. The computational results revealed that the inlet flow distribution was larger equipped in a narrow space and flow separation occurred on the edge of the bellmouth. The inlet flow distribution has increased maximum relative velocity in the fan. We concluded from these results indicate that the inlet flow characteristics strongly affect the aerodynamic performance and acoustic noise level of blowers equipped in a narrow space.
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