An acoustic streaming instability in thermoacoustic devices utilizing jet pumps.
An acoustic streaming instability in thermoacoustic devices utilizing jet pumps.
复制标题
DOI：
10.1121/1.1543588
复制
发表时间：
2003-02
期刊：
影响因子：
--
通讯作者：
S. Backhaus;G. Swift
中科院分区：
文献类型：
--
作者：
S. Backhaus;G. Swift
热声斯特林混合发动机和反馈脉冲管制冷机可以利用喷射泵来抑制流动，否则会导致大量热泄漏并降低效率。最好使用喷射泵来抑制流动，因为它们不会引入运动部件，例如波纹管或隔膜。在大多数情况下，这种形式的流抑制可以可靠地工作。然而，在某些情况下，流抑制被发现不稳定。使用这些设备的再生器和喷射泵中的简单声学模型，得出稳定性标准，预测喷射泵何时可以可靠地抑制流动。
Thermoacoustic-Stirling hybrid engines and feedback pulse tube refrigerators can utilize jet pumps to suppress streaming that would otherwise cause large heat leaks and reduced efficiency. It is desirable to use jet pumps to suppress streaming because they do not introduce moving parts such as bellows or membranes. In most cases, this form of streaming suppression works reliably. However, in some cases, the streaming suppression has been found to be unstable. Using a simple model of the acoustics in the regenerators and jet pumps of these devices, a stability criterion is derived that predicts when jet pumps can reliably suppress streaming.