Thermoacoustics
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本场研讨会主讲嘉宾之一
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8月24日上午8：30-12：30，主题为"Thermoacoustics"在北京国际会议中心305-A会议室召开。
演讲内容摘要：
In this study,the hot-wire anemometry is used to investigate the high-amplitude velocity oscillations inside a parallel-plate stack of a standing-wave thermoacoustic resonator. The ratio of the peak acoustic pressure amplitude to the ambient pressure,defined as the drive ratio (Dr),ranges from 0.3% to 6.0%. The applicability of hot-wire anemometry technique for a time-resolved velocity measurement is studied,typically at a low Dr of 0.5%,in which the condition the flow is very likely to remain laminar. At higher drive ratios,turbulent bursts start to be generated and the velocity waveform becomes strongly fluctuating. By comparing the velocity fluctuations measured in different regions of the viscous boundary layer,the transition behaviour is analyzed. The importance of this study lies in developing reliable measurement techniques for use in thermoacoustic systems and a critical analysis of the capabilities of the hot-wire anemometry in particular.
第22届国际制冷大会于2007年8月21日在北京国际会议中心隆重召开，会议为来自世界各地的科学家和工程师提供一个互相交流和分享各自成功经验的机会，以使制冷技术在今后几十年保持持续快速的发展。
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