COHERENT STRUCTURES IN TURBULENT ROUND JETS
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摘要: 圆湍射流拟序结构的实验研究，经历了流场显示定性观测、热线、激光单点测量、数字图像等方法全流场定量测量以及当前三维演变机制的探讨。与此同时，静态激励和主动技术的拟序结构控制研究也获得了大量的成果。应用涡方法、直接数值模拟和大涡模拟等对圆湍射流拟序结构进行的数值模拟，在印证试验现象的同时，还进一步深入研究了拟序结构的输运特性、激发机制等相关内容。本文对上述进展进行了综述，以期为进一步开展湍射流的研究和应用提供依据。Abstract: Reviews have been presented on the understandings of coherent structures in round turbulent jets. Experiments and numerical work on that field are summarized. The flowvisualizations, improved LDA and PDA diagnostic, the digital PIV and other experimental methods are compared. Simulation results by vortex method, large-eddy simulation (LES), direct numerical simulation (DNS) are also discussed.
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Key words:
- round turbulent jets /
- coherent structures /
- flowvisualization /
- numerical simulation
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