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. 1920 Excerpt: ...dimensions could be changed so as to fulfill both these conditions at this speed? Ans. t, = 0.643, c, = 0.663. 17. Francis noted that his runner was not quite properly designed and that there was some shock loss at entrance when running at the most efficient speed. By test the actual value of t, was found to be 0.67. ...
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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. 1920 Excerpt: ...dimensions could be changed so as to fulfill both these conditions at this speed? Ans. t, = 0.643, c, = 0.663. 17. Francis noted that his runner was not quite properly designed and that there was some shock loss at entrance when running at the most efficient speed. By test the actual value of t, was found to be 0.67. Compute the corresponding value of c, and compare with the curve in Fig. 95. Assume k = 0.5. Ans. c, = 0.655. 18. Compute the hydraulic efficiency of the Francis turbine of problem (15) using the values of t and c given in problem (17) and compare with value given by curve in Fig. 98. Ans. 0.825. 19. If this turbine discharges into a draft tube of such dimensions that m may be assumed equal to 0.3, compute the value of c for a value of t, equal to 0.675. Compute the hydraulic efficiency. The value of t, has been increased slightly here because of the presumption that the draft tube will increase the efficiency of the turbine. Compare with problems (17) and (18). Ans. c. = 0.66, ek = 0.833. 20. What is the percentage value of the discharge loss from the Francis turbine of problem (15), assuming o2 = 90 and c. = 0.66? For this particular turbine, what is the possible gain in efficiency due to using a draft tube which would reduce the velocity to zero without loss of energy? (Note. F2 sin 2 = F2 for 90 and V2 sin a2 = Vi sin /J2 = yc/2gh sin /32.) Ans. 2.15 per cent. 21. If the turbine in problem (17) is used under a head of 30 ft., find the r.p.m., the quantity of water discharged, and the power delivered to the shaft. Find similar results for problem (19). Am. N = 60.2, q = 169, h.p. = 475, N = 60.8, q = 170.2, h.p. = 484. 22. If the turbine in the preceding problem were to be run at the same speed of 60.2 r.p.m., while the head decreased to 18 ...
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Add this copy of Hydraulic Turbines to cart. $20.00, good condition, Sold by The Book Junction rated 4.0 out of 5 stars, ships from Shippensburg, PA, UNITED STATES, published 1920 by McGraw-Hill Book Company.
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Seller's Description:
G in na jacket. Rubbing & edgewear; corner bumps; spots/discoloration on cover; scratches; duststaining/foxing and yellowing; previous owners' stamp, names inside; text otherwise overall clean & sound. 281 pages.
Add this copy of Hydraulic Turbines With a Chapter on Centrifugal Pumps to cart. $20.57, 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.
Add this copy of Hydraulic Turbines With a Chapter on Centrifugal Pumps, to cart. $22.12, good condition, Sold by BookDepart rated 4.0 out of 5 stars, ships from Shepherdstown, WV, UNITED STATES, published 1920 by McGraw-Hill.
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Good. Hardcover, third edition, revised, enlarged and reset; surplus library copy with the usual stampings; reference number taped to spine; fading and shel f wear to exterior; light staining to bottom front corner; fading to pages; in good condition with clean text, firm binding.
Add this copy of Hydraulic Turbines With a Chapter on Centrifugal Pumps to cart. $30.01, 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.
Add this copy of Hydraulic Turbines With a Chapter on Centrifugal Pumps, to cart. $32.12, good condition, Sold by BookDepart rated 4.0 out of 5 stars, ships from Shepherdstown, WV, UNITED STATES, published 1914 by McGraw-Hill.
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Good. Hardcover, second edition; fading and shelf wear to exterior; slight discol oration at edges of spine, top of front cover; former owner's stamping on i nside front board; otherwise contents in good condition with clean text, fi rm binding.
Add this copy of Hydraulic Turbines With a Chapter on Centrifugal Pumps to cart. $32.92, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
Add this copy of Hydraulic Turbines With a Chapter on Centrifugal Pumps to cart. $42.59, new condition, Sold by Ria Christie Books rated 5.0 out of 5 stars, ships from Uxbridge, MIDDLESEX, UNITED KINGDOM, published 2022 by Legare Street Press.
