By H.H. Anderson
This ebook should be of significant curiosity to all engineers and architects concerned about centrifugal pumps and generators. together with statistical info derived from 20000 pumps and seven-hundred generators with capacities of 5gpm to 5000000gpm, this ebook deals the widest variety and scope of knowledge presently to be had. Statistical analyses recommend functional equipment of accelerating pump functionality and supply invaluable information for brand spanking new layout features.
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Extra resources for Centrifugal Pumps and Allied Machinery
1 Velocity triangles shown diagrammatically and graphically. Inlet Conditions It is usual to design the pump on the assumption that the flow to the inlet or eye of the impeller will be normal to the line of motion of the relevant portion of the inlet vanes and in the plane of the streamline, that is to say, in the case of pure radial flow impeller, the inlet flow is assumed to be radial, or, in the case of an impeller having an axial flow inlet portion, the inlet flow would be assumed to be axial.
3- Pump and water turbine efficiencies. l CENTRIFUGAL PUMPS 48 This is 1% higher than the pump formula since a turbine handles a greater liquid power for the same losses as a pump of the same geometry. 3 represents the average efficiency of all pumps of that size and duty, the number of pumps for each circle varying from a few to several hundred, according to the number made and tested of that particular size and duty. Speeds generally are normal for the duty. 29 [ log'? 1400J N:- 2 The Author is indebted to Dr OJ.
5 Effect of impeller blade angle on best efficiency point. generally with eight vanes, and include single stage volute and diffuser pumps, multistage volute and diffuser pumps, bowl pumps, single entry and double entry pumps. 95 Throat area Worster's data are based upon Area ratio = 11 Db tan f3 Throat area If the test data had been based upon tan f3 instead of sin f3 the test points would have agreed more closely with Worster's theoretical lines. 6) The contention of earlier investigators that the outlet angle is the major arbiter of pump performance arose through consideration of impeller only.