| 周月荣,郑刘,陈志敏*.轴对称直喷管的射流噪声特性实验研究[J].实验力学,2011,26(3):274~278 |
| 轴对称直喷管的射流噪声特性实验研究 |
| Experimental Study of Jet Flow Noise Characteristics of an Axial Symmetric Straight Nozzle |
| 投稿时间：2010-10-19 修订日期：2011-04-12 |
| DOI： |
| 中文关键词: 轴对称直喷管 射流 噪声 实验研究 |
| 英文关键词:axial symmetric straight nozzle jet flow noise experimental study |
| 基金项目: |
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| 中文摘要: |
| 为了研究喷管射流噪声特性问题，应用丹麦B.K.公司3560C型多用途分析系统，对轴对称直喷管在不同压比下产生的亚音速和跨音速射流噪声进行了测量。并对外流场轴向和截面流动特性进行了测量和分析，确定了测量噪声探头放置位置，比较了离模型截面不同位置处的噪声。给出频率在5000Hz内噪声变化的规律，发现在低频时随着静压比的增加噪声急剧增强。在接近给定实验静压比值前，噪声达到最大，并起伏振荡，在此值以后，噪声变得平缓而具有减弱的趋势。 |
| 英文摘要: |
| Type 3560C multi-analysis system manufactured by B.K. Company in Denmark was employed to explore jet flow noise characteristics. The subsonic and transonic jet flow noise generated by an axial symmetric straight nozzle under different pressure ratios was measured. Outside flow field characteristics along axial and slice direction were measured and analyzed respectively to determine the detector position, and the noises come from different positions to model section were compared. The noise variation trend was obtained when the frequency is less than 5000Hz. Results indicate that jet flow noise shoots up along with pressure ratio increasing at lower frequencies. Jet flow noise arrives at the highest point and fluctuates when the pressure ratio approaching the given value. After that, jet flow noise changes gradually and presents a downward trend. |
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