A-10 動翼噴出しを用いたファン静翼面圧力変動の抑制に関する研究(空力・騒音低減,一般講演)

概要

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It is known that flow control by blowing secondary air from rotor blades can be effective to reduce velocity deficit in rotor wake and to suppress fan tone noise generated by rotor-stator interaction. In the present research, two-dimensional flow of rotor-stator stage was numerically simulated by using an unsteady Navier-Stokes solver to clarify the effect of blowing on rotor wake and unsteady pressure fluctuation on stator surface. From the results, amplitude of surface pressure fluctuation was carefully examined for different blowing mass flow ratio. It was revealed that air blowing from ejection slot at 80% chord position on rotor suction surface achieved 90% attenuation of area-averaged surface pressure fluctuation. Thus the result suggested a promising effect of surface blowing on fan noise reduction.
公益社団法人日本ガスタービン学会の論文
2011-07-06