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Journal Articles

Numerical analysis of thermoacoustic spontaneous oscillations in a 2D rectangular and an axisymmetric closed tube

Ishigaki, Masahiro; Shirai, Koichiro*; Adachi, Shizuko*; Ishii, Katsuya*

AIP Conference Proceedings 1474, p.295 - 298, 2012/09

no abstracts in English

Oral presentation

Numerical analysis of nonlinear taconis oscillation

Shirai, Koichiro*; Ishii, Katsuya*; Ishigaki, Masahiro

no journal, , 

no abstracts in English

Oral presentation

Numerical analysis of Taconis oscillation in circular tube

Shirai, Koichiro*; Ishii, Katsuya*; Ishigaki, Masahiro

no journal, , 

Taconis oscillations, which are spontaneous oscillations of a gas column in a tube with cold and hot walls, are studied numerically. We use axisymmetric compressible Navier-Stokes equations. The spontaneous oscillations are observed in the closed tube when the temperature ratios of hot part to cold part $$T_H/T_C$$ are more than a critical value. We observed three types of oscillation modes when the length ratios of hot part to cold part $$xi$$ is 0.3. The oscillation states of fundamental mode and second mode are observed in the region upside the critical temperature ratios of Rott's theory.

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