Studies on conical and cylindrical resonators
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- 作者：G.J. Sreejith ; S. Narayanan ; T.J.S. Jothi ; K. Srinivasan
- 关键词：Hartmann whistle ; Cylindrical and conical resonators
- 刊名：Applied Acoustics
- 出版年：2008
- 出版时间：December 2008
- 年：2008
- 卷：69
- 期：12
- 页码：1161-1175
- 全文大小：2753 K
文摘
Spectral features of conical and cylindrical Hartmann resonators are compared in this work through a systematic parametric study. Experiments have been conducted by varying the following parameters: stand-off distance, nozzle pressure ratio and cone angle. Resonance frequencies of conical cavities are found to be higher than those of cylindrical cavities of the same length. Low (kHz) and high frequency (10 kHz) modes are observed in the spectra. Low frequency modes show an oscillatory trend with stand-off distance. The high frequency tones are found to be independent of cavity geometry and cavity length, and are similar to jet impingement tones.