This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 Excerpt: ...the inner periphery of the guide-blade chamber. This, however, would not be sufficiently long to give the proper direction to the jet, unless the direction of the approaching water were made to converge towards parallelism with that of the jet. The radius of the circumference in which the successive guide blades meet ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1876 Excerpt: ...the inner periphery of the guide-blade chamber. This, however, would not be sufficiently long to give the proper direction to the jet, unless the direction of the approaching water were made to converge towards parallelism with that of the jet. The radius of the circumference in which the successive guide blades meet the above normals is 1-a J, because the angle between the radius through the point where a guide blade meets the circle radius R cos a, and the radius through the point, where the preceding guide blade cuts the circle radius K, is equal to a plus the angle subtended by one of the openings. Since the turbine is wholly buried under the tail race, and the water issues both above and below the turbine, the plane of the direction of the velocity of approach must always be at right angles to the axis. If, in addition, that direction is also radial, the radius of the external circumference of the guide-blade chamber must be greater than Rt (-a), Inward-flow turbines have, however, an advantage over outward-flow turbines in this respect. The supply chamber may be so arranged that the direction of the velocity of approach gradually converges to parallelism with the direction of the jet, viz., by making the top and bottom flush with the top and bottom of the guide-blade chamber, and the other parallel to the axis, and gradually converging towards the external circumference of the guide-blade chamber till it ultimately meets a guide blade tangentially. Fig. 10 is a horizontal section through such a turbine with the vanes omitted. The external casing is a spiral, determined by the condition that the interval between the casing and the supply chamber measured along a radius vector shall be to the fixed initial interval in the ratio of the number of interven...
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Add this copy of Principles of Construction and Efficiency of Water to cart. $25.72, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
