Investigation of sound field for a standing wave tube system with flow and with lateral Helmholtz resonator Ⅱ. Experiments and discussion

• 来源期刊: 声学学报（英文版）
• 年，卷（期）: 2005,（3）
• 页码范围: 252-262
• 页数: 11页
• 语种: 英文

摘要

Based on the theoretical analysis of a standing wave tube with flow and lateral Helmholtz resonator, a relevant experimental apparatus were set up, and were successfully used to validate the the analysis above. Meanwhile an end correction and an equivalent radius coefficient covered in the theoretical analysis were also determined by experiments. Furthermore several results obtained from the theoretical analysis and experiments were used to discuss the effects of flow on the performance of Helmholtz resonator and the sound field in the standing wave tube. It is shown that using Helmholtz resonator for the standing wave tube with flow is still a good measure for noise reduction, even though the effect of noise reduction could be reduced because of flow.