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Портал Begell Электронная Бибилиотека e-Книги Журналы Справочники и Сборники статей Коллекции
International Journal of Fluid Mechanics Research
ESCI SJR: 0.206 SNIP: 0.446 CiteScore™: 0.5

ISSN Печать: 2152-5102
ISSN Онлайн: 2152-5110

Выпуски:
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International Journal of Fluid Mechanics Research

DOI: 10.1615/InterJFluidMechRes.v39.i3.20
pages 216-237

Effect of Additive on the Performance Characteristics of Centrifugal and Progressive Cavity Slurry Pumps with High Concentration Fly Ash Slurries

Sunil Chandel
Department of Mechanical Engineering, DIAT (DU) Pune, India
S. N. Singh
Department of Applied Mechanics, IIT Delhi Hauz Khas, New Delhi, India
V. Seshadri
Department of Applied Mechanics, IIT Delhi Hauz Khas, New Delhi, India

Краткое описание

Slurry pumps are extensively used in the hydraulic transportation of fly ash slurries through pipes in thermal power plants. Today a wide range of slurry pumps are available and most commonly used pumps are broadly classified into two main categories namely positive displacement and centrifugal pumps. The two types of pumps differ considerably in construction as well as in operating principle compared to the conventional pumps. Presents study reports the effect of additive on the performance characteristics of centrifugal and progressive cavity screw pump for fly ash slurry at high concentration (above Cω ≈ 50 % by weight). Mixture of Sodium Carbonate and Henko detergent (5 : 1) at a concentration of 0.2 % by weight has been used as an additive. For each type of the pump, the effect of additive on the performance characteristics have been experimentally evaluated at rated speed with fly ash slurries in the concentration range of 50 to 70 % by weight. The pump total head, overall efficiency and pump input power as a function of the flow rate have been measured. The results obtained from the centrifugal slurry pump performance show that at rated speed, the performance of the pump improves with the addition of drag reducing additive. In the case of progressive cavity screw pump, pump performance characteristics and behavior were completely different compared to the centrifugal slurry pump. At rated speed, the performance of screw pump deteriorates with the addition of drag reducing soap solution.