PASSIVE CONTROL OF THERMO-ACOUSTIC INSTABILITY IN THE HORIZONTAL RIJKE TUBE
The instability curve of a Rijke tube system was obtained accurately by following different paths of heat power and flowrate for three regions and by defining its locus from the criterion based on the measured sound pressure levels. The unstable limits in the region of flow-rate lower than that at the minimal power are compared with previous data. To observe the effect of turbulence on the unstable limits, inflow turbulence was introduced by placing a bundle of circular cylinders upstream of the heating part (30＜Red＜700). The large-amplitude inflow fluctuation may delay the transition of the chamber acoustic mode to the unstable zone even at a sufficient power. The non-uniformity of pressure and temperature fields downstream of the heating part is believed to prevent thermal and acoustic fields from coupling for instability.
Thermo-acoustic instability Rijke tube Inflow turbulence
Woo-Seog Song Seungbae Lee Dong-Shin Shin Yang Na
Department of Mechanical Engineering, College of Engineering, Inha University, Incheon 402-751, Kore Department of Mechanical System Desighn Engineering, College of Engineering,Hongik University, Scoul CAESIT, Department of Mechanical Engineering, Konkuk University, Seoul 143-701, Korea
国际会议
昆明
英文
733-739
2006-09-18（万方平台首次上网日期，不代表论文的发表时间）