Affiliation:
1. Department of Mechanical Engineering, The Johns Hopkins University, Baltimore, MD 21218
Abstract
Velocity distributions determined by using Particle Displacement Velocimetry are used for computing the pressure field within the volute of a centrifugal pump. It is shown that blade-tongue interactions and nonuniform outflux from the impeller are primary contributors to local pressure fluctuations and far field noise. Consequently, a slight increase in the space between the impeller and the tongue causes significant changes in flow structure and reductions in the resulting noise. The impact is significant as long as the tongue-impeller gap is less than 20 percent of the impeller radius. It is also shown that the vorticity distributions, particularly the large vortex trains associated with the jet/wake phenomenon, dominate variations in the total pressure. Thus, it is unlikely that a potential flow model can provide any realistic description of the flow structure.
Reference8 articles.
1. Cader
T.
, MasbernatO., and RocoM. C., 1992, “LDV Measurements in a Centrifugal Slurry Pump: Water And Dilute Slurry Flows,” ASME JOURNAL OF FLUIDS ENGINEERING, Vol. 114, pp. 606–615.
2. Chu, S., Dong, R., and Katz, J., 1993, “The Effect of Blade-Tongue Interactions on The Flow Structure, Pressure Fluctuations and Noise Within a Centrifugal Pump,” 1st International Symposium on Pump Noise and Vibrations, Paris, France, July 7–9.
3. Dong
R.
, ChuS., and KatzJ., 1992, “Quantitative Visualization of The Flow Structure Within The Volute of a Centrifugal Pump,” Part A: Technique, ASME JOURNAL OF FLUIDS ENGINEERING, Vol. 114, No. 3, pp. 390–395.
4. Dong
R.
, ChuS., and KatzJ., 1992, “Quantitative Visualization of The Flow Structure Within The Volute of a Centrifugal Pump, Part B: Results,” ASME JOURNAL OF FLUIDS ENGINEERING, Vol. 114, No. 3, pp. 396–403.
5. Miner
S. M.
, BeaudoinR. J., FlackR. D., 1989, “Laser Velocimeter Measurements in a Centrifugal Flow Pump,” Journal of Turbomachinery, Vol. 111, pp. 205–212.
Cited by
63 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献