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柳绮年, 邬传保, 郑彩云. 层结流体中湍流锋面特征的实验研究[J]. 力学学报, 1998, 30(6): 656-661. DOI: 10.6052/0459-1879-1998-6-1995-174
引用本文: 柳绮年, 邬传保, 郑彩云. 层结流体中湍流锋面特征的实验研究[J]. 力学学报, 1998, 30(6): 656-661. DOI: 10.6052/0459-1879-1998-6-1995-174
AN EXPERIMENTAL STUDY ON SOME FEATURES OF TURBULENT FRONTS IN STRATIFIED FLUID[J]. Chinese Journal of Theoretical and Applied Mechanics, 1998, 30(6): 656-661. DOI: 10.6052/0459-1879-1998-6-1995-174
Citation: AN EXPERIMENTAL STUDY ON SOME FEATURES OF TURBULENT FRONTS IN STRATIFIED FLUID[J]. Chinese Journal of Theoretical and Applied Mechanics, 1998, 30(6): 656-661. DOI: 10.6052/0459-1879-1998-6-1995-174

层结流体中湍流锋面特征的实验研究

AN EXPERIMENTAL STUDY ON SOME FEATURES OF TURBULENT FRONTS IN STRATIFIED FLUID

  • 摘要: 在线性分层的水体中;由拖动坚条形栅格产生湍流锋面,通过阴影可视化技术考察了锋面的流态和运动行为,将锋面迹线经过图像处理,获得了锋面运动特征的有关信息:运动速度随时间的增长关系;锋面坍塌的平均无因次特征时间为NTC=2.9;它随湍流Froude数Fri的增大而减小;锋面的特征尺度Hf与栅格运动的参数有关;当湍流演化成内波时,对锋面与内波运动间的关系进行了初步探讨和分析.

     

    Abstract: Some features on the turbulent fronts were studied experimentally. The turbulence was produced by towing a grid with vertical square bars through a tank filled with linear stratified fluid. The shapes and behaviors of front motions were observed and recorded by shadowgraph and photograph. The data and paxameters of fronts were collected and computed by using an im age-digitized-microcomputer processing system from the traces of fronts.The variation of front pattern with time was examined. The front rapid co...

     

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