| 邸惠芳,吴胜举,李凤鸣,许昊.低速边棱音的振动特征[J].声学技术,2014,33(3):227~231 |
| 低速边棱音的振动特征 |
| The vibration characteristics of low speed edge-tone |
| 投稿时间：2013-07-30 修订日期：2013-10-30 |
| DOI：10.3969/j.issn1000-3630.2014.03.009 |
| 中文关键词: 漩涡 边棱音 压力 |
| 英文关键词: vortex edge-tone pressure |
| 基金项目:国家自然科学基金资助项目（11074158） |
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| 摘要点击次数: 941 |
| 全文下载次数: 1986 |
| 中文摘要: |
| 边棱音是一种复杂的流体动力学现象，通过数值模拟研究边棱音发声系统在射流不稳定情况下的发声特性。研究了射流速度低于湍流速度的不同流速下，簧片尖端以及两侧的旋涡、压力、速度的分布和压力特性。模拟结果显示：射流具有明显的抖动特性，在簧片两侧形成涡街、压力交替分布，基于出现的现象，初步探讨了簧片振动产生边棱音的机理。 |
| 英文摘要: |
| Edge-tone is a complex fluid dynamic phenomenon. The paper researches the edge-tone phenomenon by numerical simulation which is conducted under the condition of the jet instability, but below turbulence. The distributions of vortex, velocity and pressure as well as the characteristics of the reed at different fluid speeds are studied. Simulation results show that the vortex street and pressure are alternately distributed on both sides of the reeds and the fluid is obviously shaking. Based on the phenomenon, the mechanism of vibrating reeds generating edge-tone is preliminarily discussed. |
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