التفاصيل البيبلوغرافية
| العنوان: |
Active control of turbomachine discrete tones |
| المؤلفون: |
Fleeter, Sanford |
| المصدر: |
Inst. of Noise Control Engineering, Noise Con 1994: Proceedings of the 1994 National Conference on Noise Control Engineering. Progress in Noise Control for Industry. |
| بيانات النشر: |
United States: NASA Center for Aerospace Information (CASI), 1994. |
| سنة النشر: |
1994 |
| مصطلحات موضوعية: |
Acoustics |
| الوصف: |
This paper was directed at active control of discrete frequency noise generated by subsonic blade rows through cancellation of the blade row interaction generated propagating acoustic waves. First discrete frequency noise generated by a rotor and stator in a duct was analyzed to determine the propagating acoustic pressure waves. Then a mathematical model was developed to analyze and predict the active control of discrete frequency noise generated by subsonic blade rows through cancellation of the propagating acoustic waves, accomplished by utilizing oscillating airfoil surfaces to generate additional control propagating pressure waves. These control waves interact with the propagating acoustic waves, thereby, in principle, canceling the acoustic waves and thus, the far field discrete frequency tones. This model was then applied to a fan exit guide vane to investigate active airfoil surface techniques for control of the propagating acoustic waves, and thus the far field discrete frequency tones, generated by blade row interactions. |
| نوع الوثيقة: |
Report |
| اللغة: |
English |
| URL الوصول: |
https://ntrs.nasa.gov/citations/19950004862 |
| رقم الانضمام: |
edsnas.19950004862 |
| قاعدة البيانات: |
NASA Technical Reports |