Search academic texts

Information × Registration Number 0219U101589, 0118U003774 , R & D reports Title The calculated investigation of aerodynamic stability to flutter of moving blades of engine fan D-436-148FM. popup.stage_title Head Hnesin Vitalii I., Доктор технічних наук Registration Date 18-09-2019 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2  The calculations of fan blade row were completed with account the mathematic models of unsteady gasdynamic and elastic blades oscillations. There presented numerical analysis of aeroelastic behaviour for oscillating fan blade row of aviation engine. The numerical method is based on solution of coupled problem of unsteady aerodynamic and elastic blades oscillations, equations are integrated in parallel-consistently with exchange by information on each iteration. There presented the calculated results of aeroelastic characteristics for harmonic and bound blades oscillations for given boundary conditions before and outlet blade row. Under bound oscillations with account interaction of five natural forms there occurred self-exitation of oscillations (flutter) by 1st natural mode. There shown that increase of the 1st natural mode frequency presents to rise of aerodynamic stability of blades oscillations, under frequency of 142 Hz, there happened the aerodamping. The results are introduced in Ukraine plants (“Ivchenko-Progres”). Product Description popup.authors popup.nrat_date 2020-04-02 Close