热敏式剪应力仪在波流动力研究中的应用

发布时间：2018-06-30 02:22

本文选题：热敏 + 剪应力　；参考：《实验流体力学》2017年03期

【摘要】：河口海岸泥沙运动直接受制于床面剪应力的大小,因此通过床面剪应力来研究泥沙运动基本问题是泥沙运动理论研究的重要途径,然而目前尚未有效形成波流复杂动力作用下床面剪应力的量测计算方法。本文利用基于微纳米技术的热敏式剪应力新型仪器,在波流长直水槽内开展了床面剪应力量测研究工作。研究表明,热敏剪应力仪响应频率高、稳定性好,量测成果较好地反映了波流作用下床面剪应力变化基本规律,热敏剪应力仪可用于波流等复杂动力作用下床面剪应力的量测。根据试验量测成果,提出了波流合成剪应力计算初步方法,可为复杂动力作用下泥沙运动基本理论问题的深入研究提供参考。
[Abstract]:The sediment movement in the estuary and coastal area is directly affected by the size of the shear stress in the bed surface. Therefore, it is an important way to study the basic sediment movement through the shear stress of the bed surface. However, the method of measuring the shear stress of the bed surface shear stress under the complex dynamic action of wave flow has not been effectively formed. A new type of thermosensitive shear stress instrument has been developed for the study of shear stress in the bed surface. The research shows that the thermosensitive shear stress meter has a high response frequency and good stability. The measurement results reflect the basic law of the change of the shear stress in the bed surface under the action of wave flow, and the thermosensitive shear stress meter can be used in the complex dynamic action of wave flow and so on. According to the test results, a preliminary method for calculating the shear stress of wave flow synthesis is proposed, which can be used as a reference for the deep study of the basic theoretical problems of sediment movement under complex dynamic action.
【作者单位】：南京水利科学研究院;水文水资源与水利工程科学国家重点实验室;港口航道泥沙工程交通行业重点实验室;河海大学港口海岸与近海工程学院;
【基金】：国家重大科学仪器设备开发专项项目(2013YQ040911) 国家自然科学基金项目(51309158)
【分类号】：TV148

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