Two-stage turbine performance improvement and noise reduction through stator-to-stator and rotor-to-rotor clocking

• Autorzy: Błaszczak J. R.
• Konferencja: International Symposium SYMKOM Compressor & Turbine Flow Systems, Treory & Application Areas (15-17.09.2008; Łódź; Polska)
• Języki publikacji: EN

Abstrakty

EN

In order to obtain better performances and reduction of noise emitted by modern turbomachines, the understanding of an influence of different geometry is essential. The experimental work presented in the paper is a continuation of earlier studies on effects of different geometry configurations. Till now only the stator-to-stator indexing (clocking) effect was considered. Nowadays main attention is directed to rotor-to-rotor clocking. A turbine with two identical stages was investigated. New geometry has been used. Special attention was drawn to noise emitted by the turbine due to the vane-to-vane and blade-to-blade clocking influences. It has been correlated to the overall performance (torque) of the turbine of new design and additional comparison has been done to the vane-to-vane indexing benefit. All results have been compared to the classical design positions of stators and rotors. The measurements presented in this paper have been performed at the nominal speed and at one off-design rotational speed of the machine. The rotor-to-rotor indexing turned out to be more advantageous than the stator-to-stator clocking and only a slight change in the rotor position is needed to yield higher efficiency. Similar influence has been observed for the emitted noise level. All measurements have been performed inside especially designed anechoic room.

Słowa kluczowe

EN

turbomachinery; noise reduction; clocking effect

PL

redukcja hałasu; metody pomiarowe; emisja hałasu

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Zeszyty Naukowe. Cieplne Maszyny Przepływowe - Turbomachinery / Politechnika Łódzka
• Rocznik: 2008
• Tom: nr 133
• Strony: 59--68
• Opis fizyczny: Bibliogr. 31 poz.

Twórcy

autor

Błaszczak J. R.

• Politechnika Lodzka Instytut Maszyn Przeplywowych

Bibliografia

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