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1. Operating characteristics
We could plot the characteristic curves of a compressible-fluid turbomachine in a coordinate system based on the elements of velocity triangles. For a fan, we would thus have a curve relating the theoretical manometric power µ th and the manometric power µ to the flow coefficient δ ′ (figure 1 ), where:
µ th = (u 2 v 2u – u 1 v 1u ) /
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Operating characteristics
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