ACTIVE ACOUSTIC SUPPRESSION OF CASCADE FLUTTER BY MEANS OF ACTUATOR SURFACE ON THE DUCT WALL

通过管道壁上的执行器表面主动声学抑制叶栅颤振

• 批准号: 07555305
• 负责人: NAMBA Masanobu
• 金额: $ 3.97万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555305/
• 关键词: Cascade Flutter; Flutter Control; Acoustic Control; Active Control; Aeroacoustics; Unsteady Aerodynamics; Anti-Sound Technology; 能動制御

Experimental verification of active acoustic flutter control was successfully conducted on the basis of a single airfoil under coupled flexure-torsion flutter at low speeds and low frequencies in a wind tunnel with loudspeakers mounted on the wall.New test facilities for higher speeds (about 120 m/s) and higher frequencies (about 150 Hz) have been constructed.Calculation codes to predict unsteady aeroynamic force on vibrating cascade blades interacting with acoustic waves from a vibrating actuator surface on the duct wall were developed for subsonic and supersonic linear cascade models and a subsonic annular cascade model. Comprehensive parametric studies have been conducted, and the optimun geometry and motion of the actuator surface for various cases were made clear.The research is being extended to acoustic suppression of unsteady blade loading and noise due to interaction of cascades with oncoming gusts. Some new findings have been obtained.

在带有扬声器的风洞中，成功地进行了基于单个翼型的低速低频弯扭耦合颤振的主动声学颤振控制实验验证。（约120 m/s）和更高频率（约150 Hz）计算程序预测了振动叶栅叶片与来自管道壁上振动激励器表面的声波相互作用时的非定常气动力，为亚音速和超音速线性叶栅模型和亚音速环形叶栅模型开发的。已经进行了全面的参数研究，明确了各种情况下作动器表面的最佳几何形状和运动，研究正在扩展到叶栅与迎面阵风相互作用引起的非定常叶片载荷和噪声的声学抑制。获得了一些新的发现。

项目成果

長井・難波: "ダクト壁音源による超音速翼列フラッタの能動的制御" 日本機械学会論文集(B編). 62-604. 4119-4126 (1996)

Nagai 和 Namba：“管道壁声源对超音速叶片排颤振的主动控制”，日本机械工程师学会会刊（B 版） 4119-4126。

Nagai, K.and Namba, M.: "Acoustic Control Subsonic Cascade Flutter in Bending Motion" Proceedings of 12^<th> International Symposium on Air Breathing Engines. ISABE95-7091. 992-1000 (1995)

Nagai, K. 和 Namba, M.：“弯曲运动中的声学控制亚音速级联颤振”第 12 届国际空气呼吸发动机研讨会论文集。

K.Nagai and M.Namba: "Effect of Acoustic Control on the Flutter Boundaries of Supersonic Cascade" Unsteady Aerodynamics and Aeroelasticity of Turbomachines,Kluwer Academic Publishers. (1998)

K.Nagai 和 M.Namba：“声学控制对超音速级联颤振边界的影响”涡轮机的非定常空气动力学和气动弹性，Kluwer 学术出版社。

K.Nagai and M.Namba: "Acoustic Control of Subsonic Cascade Flutter in Bending Motion" Proc.12th Int.Symp.Air Breathing Engines. 1. 992-1000 (1995)

K.Nagai 和 M.Namba：“弯曲运动中亚音速级联颤振的声学控制”Proc.12th Int.Symp.Air Breathing Engines。

Nagai, K.et al.: "Active Suppression of Cascade Flutter by Means of Sound Waves from Duct Wall Actuator Surface" Unsteady Aeroynamics and Aeroelasticity of Turbomachines,Elsevier Science B.V.565-581 (1995)

Nagai, K.等人：“通过管道壁执行器表面的声波主动抑制叶栅颤振”涡轮机的非定常空气动力学和气动弹性，Elsevier Science B.V.565-581 (1995)