BE Mechanical 2003 Structure - K. K. Wagh Education Society
BE Mechanical 2003 Structure - K. K. Wagh Education Society
BE Mechanical 2003 Structure - K. K. Wagh Education Society
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Types of reaction turbines Francis, Kaplan, Deriaz, reversible, low head turbines,<br />
Main components and constructional features, draft tube, types, efficiency,<br />
limiations for use of draft tubes, cavitation.<br />
5. Governing performance and selection:<br />
Governing mechanism for Francis, Kaplan turbine, pelton wheel; safety devices<br />
of turbine, pressure regulators, surge tanks, forebay. Performance of water<br />
turbines: types of characteristic curves and related terms unit quantities specific<br />
speed and shape of runner. Selection of turbine considering various factors.<br />
6. Hydrodynamic Pumps:<br />
Classification, Components of centrifugal pumps. Its installation. Various terms<br />
associated with centrifugal pump, various heads, velocity triangles and their<br />
analysis, effect of outlet blade angle, cavitation, NPSH, Thomas cavitation factor,<br />
priming of punps, installation, specific speed and pump classification.<br />
Performance characteristics of centrifugal pump. Axial thrust, maintenance,<br />
troubles and remedies, series and parallel operation of pumps, system resistance<br />
curve, pump system interaction, water hammer problem in pumping system.<br />
7. Similarity (applied to turbines and pumps) :<br />
Model testing, scale effect.<br />
8. Special pumps:<br />
Airlift pump, Hydraulic ram, deep well pump, submersible pumps, vertical<br />
turbine pump, regenerative pump, screw pump, gear pump, reciprocating pump.<br />
Jet pumps, construction, principle of operation, energy analysis, performance<br />
characteristics.
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