Study on Active Suppression of Jet Noise
| Project/Area Number |
20360381
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (B)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Aerospace engineering
|
|---|
| Research Institution | The University of Tokyo |
|---|
Principal Investigator |
WATANABE Toshinori The University of Tokyo, 大学院・工学系研究科, 教授 (10201211)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
HIMENO Takehiro 東京大学, 大学院・工学系研究科 (60376506)
|
|---|
| Project Period (FY) |
2008 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2010: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2009: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2008: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
|
|---|
| Keywords | ジェット騒音 / 騒音低減 / マイクロジェット / 超音速ジェット / 衝撃波 / スクリーチ / 能動制御 / シンセティックジェット |
|---|
| Research Abstract |
Jet noise reduction is required for the realization of environmentally-friendly and highly-efficient supersonic jet propulsion system. In the present study, experimental and numerical investigations were performed in order to clarify the effects of microjet injection on supersonic jet noise and the mechanism of the noise reduction. Far field acoustic measurements were executed and the reduction of the overall sound pressure level up to 10dB was found. Flow field visualization and CFD analysis clarified that shock cell structure was changed and large fluctuation of jet shear layers was suppressed by microjet injection. A new approach with Piezo-electric actuator was tried to reduce the jet noise as well.
|
Report
(4 results)
Research Products
(17 results)
-
-
-
-
-
-
-
-
-
-
[Presentation] Effect of Microjet Injection on Supersonic Jet Noise2009
Author(s)
Okada, R., Watanabe, T., Uzawa, S., Himeno, T., Oishi, T.
Organizer
International Symposium on Unsteady Aerodynamics, Aeroacoustics and Aeroelasticity of Turbomachines 12
Place of Presentation
ロンドン,英国
Year and Date
2009-09-02
Related Report
-
-
-
-
-
-
-
