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2012 年 05 月 16 日
Seminar - Flow duct aeroacoustics – Examples of Current Research Issues by Prof. Mats Åbom

Date:

16 May 2012 (Wednesday)

Time:

2:30 pm – 3:30 pm

Venue:

EF305, The Hong Kong Polytechnic University

Abstract:
The development of large scale computing as well as memory and sampling capacity has over the last 10-20 years significantly changed the possibility to measure and compute in detail in both space and time. This means that new possibilities have been opened to study and understand in detail flow and sound phenomena and their interaction. From this starting point examples of research done at KTH are presented covering (1) Multi-port models; (2) Experimental techniques; (3) efficient (Linearized Navier Stokes) methods for computing acoustic scattering; (4) modeling of sound generation from an orifice (LES); (5) amplification of sound and whistling; and (6) examples of applications – turbo machinery, silencers, etc.


Biosketch:
Prof. Mats Åbom is Professor in Technical Acoustics at the Department of Aeronautical and Vehicle Engineering, the Royal Institute of Technology (Kungliga Tekniska Högskolan, KTH), Stockholm, Sweden. He is also the Head of the acoustic division at the department, the Marcus Wallenberg Laboratory (MWL) for Sound and Vibration Research. Prof. Åbom gained his a M.Sc. in Engineering Physics and PhD in Technical Acoustics, both from KTH in 1989. After his PhD he continued his research at KTH including a research visit to LAUM in France and obtained the DSc (“Docent”) title in 1995. During the years 1996-2000 he worked at ABB Corp Research as main project leader on projects concerning active control and noise control of fans and gas turbines. In November 2000 he came back to KTH to a new position as professor in Technical Acoustics with focus on Flow Acoustics. Prof. Åbom main research areas are concerned with the generation and propagation of sound in fluid machinery systems in particular related to interior flows, i.e., pipe and duct systems. The applications range from household appliances and ventilation systems to intake and exhaust systems on vehicles and power plants. Mats and the Flow Acoustic group at MWL is strongly involved in both national and European projects. Among other things the group is a partner in one of the new centres for excellent researchers created at KTH by the Swedish Research Council, the Linne FLOW Centre. The group is also a partner in the KTH Competence Center for Gas Exchange (CCGEx), which focus on research regarding more efficient internal combustion engines in cooperation with leading manufacturers.