选沙相似律对模型沙波相似性影响的试验研究

发布时间：2018-04-20 23:26

本文选题：选沙相似律 + 波高　；参考：《水科学进展》2017年05期

【摘要】：为了弄清选沙相似律对动床模型沙波相似性的影响,开展基于起动相似等3种不同相似律选择模型沙的沙波水槽试验。基于试验观测的沙波波高、波长以及沙波不同部位的水深、流速,对比分析了沙波尺度及其随水流强度变化过程的相似性。结果表明:当模型沙重率、形状与原型沙相同时,满足起动相似的模型沙沙波尺度与原型相似性最高,满足悬浮相似模型沙的沙波整体偏高、偏长,兼顾起动与悬浮相似的模型沙介于两者之间;不同选沙相似律不影响沙波波高、波长随相对水流强度的变化规律,满足不同相似律的模型沙沙波波高均在相同的相对水流强度达到最大值,波长随相对水流强度增大而增大。说明偏离起动相似越少,沙波相似程度越高。
[Abstract]:In order to find out the influence of sediment separation similarity law on sand wave similarity of moving bed model, a sand wave flume experiment based on three different similarity laws, such as starting similarity, was carried out. Based on the sand wave height, wave length, water depth and velocity of different parts of the sand wave, the similarity of the sand wave scale and its variation process with the water flow intensity is compared and analyzed. The results show that when the model sand weight ratio and shape are the same as the prototype sand, the model sand wave with similar incipient sand has the highest similarity to the prototype, and the sand wave satisfying the suspended similarity model sand is higher and longer. The similarity law of sediment separation does not affect the wave height, and the wavelength varies with the relative flow intensity. The wave height of sand wave reaches the maximum at the same relative flow intensity, and the wavelength increases with the increase of the relative flow intensity. The smaller the starting similarity, the higher the sand wave similarity.
【作者单位】：武汉大学水资源与水电工程科学国家重点实验室;长江航道规划设计研究院;
【基金】：国家重点研发计划资助项目(2016YFC0402101) 国家自然科学基金资助项目(11472199)~~
【分类号】：TV149

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