Aeroacoustics
My research in aeroacoustics covers computational and experimental techniques, mainly for investigating airframe noise problems. I helped developed the SotonCAA suite of high-order parallel finite difference codes used extensively at Southampton. Current application projects include high-lift device and landing gear noise on commercial airliners.
My current focus is developing microphone array techniques for hard-walled, closed section wind tunnels. This is highly challenging, but is necessary to enable the next-generation of civil airliners to be designed for low-noise. The system I have developed is now used extensively in our large wind tunnels at Southampton for many projects, as well as in other commercial wind tunnels.
Journal publications
Ashcroft, G.B., Takeda, K. and Zhang, X. (2003) A numerical investigation of the noise radiated by a turbulent flow over a cavity. Journal of Sound and Vibration, 265, (1), 43-60. (doi:10.1016/S0022-460X
Takeda, K. and Shieh, C.M. (2004) Cavity tones by computational aeroacoustics. International Journal of Computational Fluid Dynamics, 18, (6), 439-454.
Takeda, K., Zhang, X. and Nelson, P.A. (2004) Computational aeroacoustic simulations of leading-edge slat flow. Journal of Sound and Vibration, 270, (3), 559-572. (doi:10.1016/j.jsv.2003.09.046)
Takeda, K. (2004) Book Review. Aeroacoustic Measurements. Journal of Fluid Mechanics, 502, 376-377. (doi:10.1017/S0022112003238398)
Projects
Microphone array development for use in hard-walled, closed-section wind tunnels
Computational aeroacoustic investigations of landing gear noise
Computational and experimental investigations of high-lift device noise
Conference publications
Ashcroft, G., Takeda, K. and Zhang, X. (2000) Computational modelling of the aeroacoustics of a door cavity flow oscillation. In, Proceedings of the 7th International Congress on Sound and Vibration. USA, International Institute of Acoustics and Vibration.
Takeda, K., Zhang, X. and Nelson, P.A. (2003) Linearized Euler simulations of leading-edge slat flow. In, 41st Aerospace Sciences Meeting and Exhibit, Reno, NV, USA, 6-9 Jan 2003, Reno, NV, USA. USA, AIAA, 10pp, 1-10.
Takeda, K., Zhang, X., Ashcroft, G.B. and Nelson, P.A. (2001) Unsteady aerodynamics of flap cove flow in a high-lift device configuration. In, Proceedings of the 39 th Aerospace Sciences Meeting and Exhibition. Reston, USA, American Institute of Aeronautics and Astronautics.
K. Takeda, G. B. Ashcroft, X. Zhang and P.A. Nelson, "Unsteady Aerodynamics of Slat Cove Flow in a High-Lift Device Configuration", 39th Aerospace Sciences Meeting and Exhibit, Reno, NV, USA, 8-11 January 2001, AIAA Paper 2001-0706
K. Takeda, G. B. Ashcroft, X. Zhang and P.A. Nelson, "Unsteady Aerodynamics of Flap Cove Flow in a High-Lift Device Configuration", 39th Aerospace Sciences Meeting and Exhibit, Reno, NV, USA, 8-11 January 2001, AIAA Paper 2001-0707
X Zhang, K Takeda and G Ashcroft, "CAA Research at Southampton with Aerospace and Automotive Applications", to be presented at the One-day meeting on Computational Aeroacoustics, University of Greenwich, 6 July 2000
G. B. Ashcroft, K. Takeda and X. Zhang , "Computational Modelling of the Aeroacoustics of a Door Cavity Flow Oscillation", Proc 7th International Congress on Sound and Vibration, Garmisch-Partenkirchen, Germany, July 2000
G. B. Ashcroft, K. Takeda and X. Zhang ,
"Computations of Self-Induced Oscillatory Flow in an Automobile Door Cavity", Proc 3rd CAA Workshop on Benchmark Problems, Ohio Aerospace Institute/Nasa Glenn, November 1999
Takeda, K., Zhang, X. and Nelson, P.A. (2002) Unsteady aerodynamics and aeroacoustics of a high-lift device configuration. In, 40th AIAA Aerospace Sciences Meeting and Exhibition, Reno, USA, 14-17 January 2002. , 10pp.
Takeda, K. and Fenech, B. (2007) Towards more accurate beamforming levels in closed-section wind tunnels via de-reverberation. In, 13th AIAA/CEAS Aeroacoustics Conference (28th AIAA Aeroacoustics Conference), Rome, Italy, 21-23 May 2007. USA, American Institute of Aeronautics and Astronautics, 12pp, 1-12.