2. Analysis of flow losses and how to reduce them
In this paragraph, we'll look at losses, which take the form of an increase in entropy, and which are involved in efficiency (BM 4,560 § 2) through the retardation coefficients ϕ and ψ. Beforehand, we'll give some clarification on the exit angles α 1 or β 2 , which we considered in our discussion of efficiency to be fixed solely by the blade grid geometry.
2.1 Exit angle of a blade grid in two-dimensional flow
In subsonic applications, the exit angle remains very close to Arcsin (c /t). However, given the low angles used in distributors, a small deviation can lead to a non-negligible difference in flow rate, and if the vein is too closed, the guaranteed maximum power cannot...
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Analysis of flow losses and how to reduce them
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