IGTC-27 Sound Absorbing Wall Effect on Unsteady Aerodynamic Characteristics of Cascade(Session A-8 UNSTEADY AERODYNAMICS II)
スポンサーリンク
概要
- 論文の詳細を見る
A three-dimensional theory is developed for a stationary or moving supersonic or subsonic cascade between parallel walls to predict the sound absorbing wall liner effect on the unsteady aerodynamic forces upon blades vibrating or interacting with an inlet distortion. A side wall of the model is partially composed of a sound absorbing wall liner with uniform acoustic admittance, which is assumed to depend on the sound frequency sensed by the wall liner. In the case of the vibrating supersonic stationary blades, the substantial variation of the total aerodynamic work with change in the wall admittance is found to occur only in a confined effective range of the admittance magnitude. The effective range is located in a smaller admittance magnitude and the wall liner effect is larger and more complicated for a supersonic cascade compared with a subsonic cascade. The effective range moves to the smaller admittance magnitude as the Mach number increases. In the case of the supersonic moving blades, the change of the aerodynamic work with change of the cavity depth of the wall liner becomes conspicuous when the wall admittance for the acoustic mode of the least circumferential order is in a certain effective range. The wall liner effect on the acoustic power of the sound generated by interaction with an inlet distortion is larger for the downstream propagating waves than that for the upstream propagating waves.
- 公益社団法人日本ガスタービン学会の論文
著者
-
YAMASAKI N.
Department of Geosciences and Technology, Tohoku University
-
Namba M.
Department Of Aeronautical Engineering Kyushu University
関連論文
- Possibility of Diamond Growth in Hydrothermal Conditions at Low Temperature and High Pressure
- IGTC-27 Sound Absorbing Wall Effect on Unsteady Aerodynamic Characteristics of Cascade(Session A-8 UNSTEADY AERODYNAMICS II)
- 219. Cytotoxic Effects of Griseofulvin on Human Normal Cells in Vitro (The Second Meeting for the Study of Toxic Effect)