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Flow computations and experimental investigation of exhaust hoods

100%

Tajć L. , Polansky J. , Knourek J. , Feldberg L. A.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

1999

tom nr 115

371--378

The results are presented here of a piece of experimental research, the aim of which was to find the most suitable shapes of all parts of the double-flow design of the exhaust hood in a steam turbine. Various forms of the walls of the casing and their influence upon the loss coefficient are described. Attention was paid to the process of blowing the steam into the boundary layer on the wall of the diffuser and stating the overall loss. The computations of the flow in the diffuser proper are presented and the influence of the density of the grid and the influence of the rotation of flow are shown. The actual inlet flow parameters are taken into consideration.

Measurement of dispersivity and moisture content in experimental turbines by optical methods

100%

Feldberg L. A. , Semenov V. N. , Popov S. A.

Transactions of the Institute of Fluid-Flow Machinery

2003

tom nr 113

137--146

The issue of using optical methods for measurements of moisture drops sizing and their concentration in a zone of steam flow condensation are set forth in this paper. A practical applications of optical indicatrice, spectral transparency, and "narrow angles" methods are shown. Main principles of probe construction to investigate two-phase medium are outlined. Practical results of investigations performed on experimental stands and a full-scale turbine are given.