Theory of Turbines (Classic Reprint) - Hardcover

Excerpt from Theory of Turbines

About forty-five years ago M. Poncelet made a solution of the Fourneyron turbine which, for its thoroughness and the direct ness of its analysis, has become classical (oomptes Renting, But that writer neglected the frictional (and other) resistances within the wheel, and assumed that the buckets, or passages in the wheel, were constantly full. The former is an important element in the theory, and its consideration makes the analysis but little more complicated.

Weisbach, in his Ifydraulic Motors, gives a solution in which frictional resistances are involved, and the sections of the stream at the outlet of the supply chamber, the entrance into the wheel, and all the sections of the buckets are determined when the wheel runs for best efficiency. The formulas, however, are so complex that but little practical knowledge can be gained from their general discussion. I have, therefore, assumed that the wheels here discussed have about the proportions made for com mercial purposes, and deduced certain numerical results which are entered in tables and a simple examination of these furnishes certain desirable information.

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