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2 Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

2 1999

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Preliminary acoustic measurements for a two-stage turbine at TUL

Comte-Bellot G., Cieplucha J., Błaszczak J., Smolny A., Gorząd P.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

1999

nr 115

523--531

Acoustic spectra have been collected at 16 points at 2.5 m from the turbine exit. The turbine has two rotors with 96 blades and two stators with 16 blades. The nominal angular frequency was 2400 mm. The rotor blade passing frequency was recognized as well as some of its harmonics. Spurious signals could be also identified, due to the exit flow impact on the Schenck eddy-current brake placed on the turbine axis, and the upstream fan generating the working fluid to the turbine. Wall proximity could be also a problem. Improvements are suggested for future experiments.

Boundary layer measurements in the pressure side leading edge region of an impulse turbine blade

Cieplucha J., Smolny A., Bario F.

Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka

1999

nr 115

81--85

This paper concerns experimental research using LDV laser anemometry technique developed in Ecole Centrale de Lyon . The research work is relative to separated boundary layer on the pressure side of an impulse turbine blade. The large dimension of the blade (1.4m chord) permits detailed studies of the fundamental problems such as the behaviour of boundary layer separation bubble under different turbulent inlet conditions.