Abstract
Experiments were performed using a centrifugal blower fitted with a double sided impeller of 300mm diameter having backward curved vanes to examine the effect of inlet air temperature on the performance characteristics, with particular reference to the variation of pressure ratio. The inlet air temperature was varied from minus 20°C to plus 35°C. The results were found to satisfy the relation previously found by Prof. S. Awano that γ-1 varies inversely proportional to the absolute inlet air temperature, where γdenotes the pressure ratio of the blower. Further, the experimental results were found to satisfy the dimensional relationships established by R. S. Capon and G. V. Brooke. As for axial compressors, it was found that the above-mentioned relation is also applicable from the theoretical point of view.
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