Vortical flow in thermo-acoustic devices |
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| Authors: | Masahiro Ishigaki Kazuto Kuzuu Shizuko Adachi Katsuya Ishii |
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| Affiliation: | 1. CSE, Nagoya Univ., Nagoya,464-8601, Japan;2. ITC, Nagoya Univ., Nagoya, 464-8601, Japan;3. RIKEN, Wako, 351-0198, Japan;4. CSE, Nagoya Univ., Nagoya,464-8601, Japan ITC, Nagoya Univ., Nagoya, 464-8601, Japan |
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| Abstract: | Taconis oscillation in a closed long tube with large thermal gradient is studied by numerical calculation of the 2D compressible Navier-Stokes equations. The both ends of tube are hot (T = TH), and the center of side wall is cold (T = TC). We analyze the pressure amplitude pamp and the time averaged temperature Tm in the closed tube. pamp is almost homogenous in the tube cross section, however, Tm is not homogenous in the central cold region. We also observe two steady states at the same temperature ratio θ = TH/TC. It is important to analyze the effects of the boundary layer in this cold region on Taconis oscillations. (© 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) |
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