| 潮间带泥沙起动切应力现场测量装置 |
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| 引用本文： | 龚政,甘全,徐贝贝,张茜,赵堃,张长宽. 潮间带泥沙起动切应力现场测量装置[J]. 水利水电科技进展, 2019, 39(3): 56-61 |
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| 作者姓名： | 龚政 甘全 徐贝贝 张茜 赵堃 张长宽 |
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| 作者单位： | 河海大学江苏省海岸海洋资源开发与环境安全重点实验室;河海大学港口海岸与近海工程学院 |
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| 基金项目： | 国家自然科学基金国际(地区)合作与交流项目(51620105005)；国家自然科学基金(51879095) |
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| 摘 要： | 为了准确获得泥沙起动参数,减小对原状土的扰动,研制了一种潮间带泥沙起动切应力现场测量装置,利用Fluent软件模拟了装置内部流场与底部切应力,确定了在底部产生均匀切应力时的内外筒最佳转速比,建立了转速与底部切应力之间的关系,探讨了装置的最佳转速比受装置尺寸的影响。结果表明,该装置的内圆筒、外圆筒、剪力环三者同向转动时可以产生较大的底部切应力。以内圆筒半径310 mm、外圆筒半径410 mm、工作水深260 mm为例,如不设置剪力环且内外圆筒同向转动,装置最佳转速比为3∶1,此时底部切应力在距离轴心0.33～0.38 m范围内最为均匀;如设置剪力环且内圆筒、外圆筒、剪力环同向转动,装置最佳转速比为3∶1∶3,此时底部切应力在距离轴心0.33～0.40 m范围内最为均匀。底部切应力与外圆筒转速之间符合二次函数关系。
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| 关 键 词： | 潮间带；泥沙运动；临界起动切应力；现场测量装置；最佳转速比 |
An in situ measurement device for sediment critical shear stress in intertidal zone |
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| GONG Zheng,GAN Quan,XU Beibei,ZHANG Qian,ZHAO Kun and ZHANG Changkuan. An in situ measurement device for sediment critical shear stress in intertidal zone[J]. Advances in Science and Technology of Water Resources, 2019, 39(3): 56-61 |
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| Authors: | GONG Zheng GAN Quan XU Beibei ZHANG Qian ZHAO Kun ZHANG Changkuan |
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| Affiliation: | Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security, Hohai University, Nanjing 210098, China; College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China,College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China and College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China |
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| Abstract: | |
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| Keywords: | intertidal zone sediment movement critical shear stress in situ measurement device optimal speed ratio |
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