Measurements of the three-dimensional flow field entering and leaving a mixed flow pump of non-dimensional specific speed k = 1.89 [Ns = 100 r/min (metric)] are discussed as a function of flowrate. Flow reversal at inlet at reduced flows is seen to result in abnormally high total pressures in the casing region, but causes no noticeable discontinuities on the head-flow characteristics. Inlet prerotation is associated with the transport of angular momentum by the reversal eddy and begins with the initiation of flow reversal.
GuitonP.Actual behaviour of pumps outside their high efficiency range (a tentative survey). Lecture series 1978–3, Von Karman Institute for Fluid Mechanics, 1978.
5.
SoundranayagamS.RamarajanV.Off design performance of a mixed flow pump. International IMechE Conference on Part load pumping operation, control and behaviour, 1988, paper C332/88, pp. 13–24 (Mechanical Engineering Publications, London).
6.
SarkarS.Performance prediction of a mixed flow impeller. Proc. Instn Mech. Engrs, Part A, 1992, 206(A3), 189–196.
7.
CareyC.FraserS. M.ShamsolahiS.Mc-EwenD.Flow analysis and part load pumping performance of model mixed flow pump. International IMechE Conference on Part load pumping operation, control and behaviour, 1988, paper C339/88, pp. 83–88 (Mechanical Engineering Publications, London).
8.
SrinivasaG. R.SoundranayagamS.Aerodynamic measurements in a mixed flow impeller. IAHR Symposium, Belgrade, 1990.
9.
FraserS. M.CareyC.WilsonG.Behaviour of air in a rotor of model mixed flow pump operating at peak efficiency. Trans. ASME, J. Fluid Engng, 1985, 107, 183–190.
10.
StirlingT. E.WilsonG.A theoretically based CAD method for mixed flow pumps. Eighth Technical Conference of the British Pump Manufacturers Association on Pumps—the heart of the matter, Cambridge, 1983, paper 15, pp. 185–203.
11.
SeenoY.NakaseY.An analysis of flow through a mixed flow impeller. Trans. ASME, J. Engng for Power, 1972, 71-GT-2, 43–72.
12.
InoueM.IkuiT.KamadaY.TashiroM.A quasi three dimensional design of diagonal flow impellers by use of cascade data. IAHR Tenth Symposium, Tokyo, 1986, pp. 403–414.
13.
CrosbyN.FisherE. H.Experimental and theoretical studies of mixed flow fan performance. IMechE Conference, 1987, paper C276/87, pp. 95–102 (Mechanical Engineering Publications, London).
14.
StepanoffA. J.Centrifugal and axial flow pumps, 2nd edition, 1957 (John Wiley, New York).
StodalaA.Steam and gas turbines, Vol. 2, 1945 (Peter Smith, New York).
17.
FowlerH. S.Comparison of thin plate and thick plate aerofoil blades in a centrifugal fan. ME report ME-238, National Research Council of Canada, Ottawa, 1971.
BetzA.Introduction to the theory of flow machine, 1966 (Braun, Karlruhe, Germany).
20.
SoundranayagamS.RamarajanV.A new four hole probe for three dimensional measurements. Rev. Scient. Instrums, 1980, 51(7).
21.
RayA. S.Aerodynamic investigation in a mixed flow impeller. PhD thesis, Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India, 1990.
22.
SrinivasaG. R.Investigation of a mixed flow impeller. PhD thesis, Department of Mechanical Engineering, Indian Institute of Science, Bangalore, India, 1989.
