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Information × Registration Number 0220U100348, 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 16-01-2020 Organization G.S. Pisarenko Institute for Problems of Strength of the National Academy of Sciences of Ukraine popup.description2  Experimental studies were performed for two types of blade airfoils flat cascades with different geometric parameters (step and take-off angle) and flow conditions to determine the non-stationary aerodynamic loads on the airfoil profiles in the flow. According to results, the calculation of aerodynamic coefficients of impact was performed. It is established that at zero angles of attack, the dependence of the coefficient of non-stationary force on the output profiles of cascades on the reduced oscillation frequency practically coincides. This is due to the fact that the aerodynamic coupling of vibrated profiles with decreasing cascade step under other equal conditions is greatly enhanced, and with decreasing cascade take-off angle, it becomes less. Therefore, if both factors are combined, it is possible to obtain the same non-stationary component of the aerodynamic force. As the flow conditions (-5° angle of attack) change, the values of the non-stationary force coefficients for both blade airfoils flat cascades increase, and more intensively with decreasing the step of profiles and the take-off angle due to their greater interaction. Product Description popup.authors popup.nrat_date 2020-04-02 Close