Measurements of turbulence statistics in high subsonic jets
Measurements of turbulence statistics in high subsonic jets
复制标题
高亚音速射流中湍流统计的测量
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
P. Jordan
中科院分区：
文献类型：
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作者：
O. Power;F. Kerhervé;J. Fitzpatrick;P. Jordan
*†‡§研究了单点和多点激光多普勒测速获得的高亚音速射流湍流统计数据。这些特性揭示了湍流能量转化为声能的机制，并且在声学类比用于预测射流辐射噪声的地方具有重要意义。给出并讨论了射流的平均气动特性、湍流场的谱含量以及长度和时间尺度等统计特性。研究了温度和射流出口速度对气流气动结构和气源特性的影响。命名法ao =声速f =频率
*† ‡ § The turbulence statistics of high subsonic jets obtained from single and multi-point laser Doppler velocimetry measurement are investigated. These properties shed light on the mechanisms of conversion of the turbulent energy into acoustic energy and are of interest where the acoustic analogy is used for the prediction of radiated noise from jet flows. The mean aerodynamic properties of the jet flow, the spectral content of the turbulent field and the statistical properties such as length and time scale are presented and discussed. The effect of the temperature and the exit velocity of the jet on the aerodynamic structure of the flow and source properties are also investigated. Nomenclature ao = sound speed f = frequency