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1. (WO2009128742) BIROTARY PROPELLER FAN

Pub. No.:    WO/2009/128742    International Application No.:    PCT/RU2008/000283
Publication Date: Oct 22, 2009 International Filing Date: May 7, 2008
IPC: F04D 19/02
F02K 3/072
Applicants: CENTRAL INSTITUTE OF AVIATION MOTORS (CIAM)
ФЕДЕРАЛЬНОЕ ГОСУДАРСТВЕННОЕ УНИТАРНОЕ ПРЕДПРИЯТИЕ "ЦEНТPAЛЬНЫЙ ИНСТИТУТ АВИАЦИОННОГО МОТОРОСТРОЕНИЯ ИМЕНИ П.И. БAPAНOВA"; ФГУП "ЦИAM ИМ. П.И. БАРАНОВА"
MILESHIN, Viktor Ivanovich
МИЛЕШИН Виктор Иванович
PANKOV, Sergey Vladimirovich
ПАНКОВ Сергей Владимирович
GLADKOV, Evgeniy Prokofevich
ГЛАДКОВ Евгений Прокофьевич
OREKHOV, Igor Konstantinovich
ОРЕХОВ Игорь Константинович
Inventors: MILESHIN, Viktor Ivanovich
МИЛЕШИН Виктор Иванович
PANKOV, Sergey Vladimirovich
ПАНКОВ Сергей Владимирович
GLADKOV, Evgeniy Prokofevich
ГЛАДКОВ Евгений Прокофьевич
OREKHOV, Igor Konstantinovich
ОРЕХОВ Игорь Константинович
Title: BIROTARY PROPELLER FAN
Abstract:
The invention relates to aviation engine engineering, more specifically to fans for aircraft gas-turbine engines and makes it possible to reduce noise during the operation thereof. The technical result is achieved in the inventive birotary propeller fan, preferably without a cowling, which comprises a first and second rotor wheels which are arranged one after another and are provided with blades rotatable in the discs with respect to the radial axes. The leading edges of the blades of the first rotor wheel are designed in such away that said blades become forward-sweep blades and the deviation thereof from the radial rotational axis of the blades increases from the wheel-hub towards the periphery of the wheel. The leading edges of the blades of the second rotor wheel are designed in such a way that said blades become backward sweep blades and the deviation thereof from the radial rotational axis of the blades reduces from the periphery of the wheel towards the wheel-hub.