| Article Details : |
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| | | Article Name : | | | Part load operation in M.D hydro power plant unit
two | | Author Name : | | | ALI AHMED ALI ADAM, TAWFIG AHMED GAMAL ELDIN ABDALRHMAN, ABDALLAH MOKHTAR MOHAMMED ABDALLAH | | Publisher : | | | Bridge Center | | Article URL : |  | | | Abstract : | | | The flow in the Francis turbines draft tube cone operate
at partial discharge is a complex hydrodynamic phenomenon. And
has special attention because unacceptable source and resulting
pressure pulsation, power fluctuation and putting the plant at risk 4.
The head and discharge values are two main factors that affects vortex
structure and the performance of the draft tube then hydraulic
system6 . This paper presents the part load operation conditions in
the draft tube cone at three deferent heads (cases) in M. D. Hydro
power plant. The study is undertaken for operating conditions
parameters corresponding to high part load 0.9QBEP to low part load
0.5 QBEP. The discharge coefficients is used to predict specific speed
and swirl number, The minimum swirl number is 0.11 at BEP case
(A) and maximum is 1.05 at 0.5 QBEP when the head 33 m case(c). It
is shown that the rise in the pressure pulsation due to swirl increase. | | Keywords : | | | draft tube, Francis , part load; swirl number; vortex
rope |
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