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Information × Registration Number 0220U104804, 0119U102346 , R & D reports Title Determination of the influence of blade airfoils cascade parameters and flow conditions on dynamic stability to subsonic flutter popup.stage_title Head Kabannyk Serhii M., Кандидат технічних наук Registration Date 28-12-2020 Organization G.S. Pisarenko Institute for Problems of Strength of the National Academy of Sciences of Ukraine popup.description2 The object of investigation is the subsonic flutter of the bladed disk of axial compressors. The aim of the work is to establish the dependencies of the influence of the cascade parameters of the airfoil profiles and the conditions of its flow around the formation of the boundary of the dynamic stability of the bladed assembles. Research methods - the use of the OSA-2M test rig available at the Institute, which is a subsonic wind tunnel of direct action with emission into the atmosphere. A description of the method of experimental determination of non-stationary aerodynamic loads acting on oscillating blades during their flow around the subsonic flow is presented. Experimental studies were performed for two types of blade cascade with different geometric parameters (pitch and angle of attack) and flow conditions to determine non-stationary aerodynamic loads on the blade cascade oscillating in the flow. Based on their results, the calculation of aerodynamic coefficients of impact was performed and the dependences of the absolute values of the coefficients of non-stationary aerodynamic forces and moment on the reduced oscillation frequency for different values of the angle of attack were established. It is established that at certain values of the angle of attack the dependences of the nonstationary aerodynamic force on the output and adjacent profiles on the reduced oscillation frequency practically coincide. This is due to the fact that the aerodynamic interaction of oscillating profiles with a decrease in the pitch of the blade cascade is significantly increased, and with a decrease in the angle of the cascade - is weakened by reducing the diffuseness of the interscapular canal of the assembly. Therefore, when combining both geometric parameters, it is possible to obtain the same nonstationary aerodynamic force or moment. Product Description popup.authors Kruts Vаdym O. Onyshchenko Yevheniia O. Savchenko Kyrylo V. popup.nrat_date 2020-12-28 Close