杨苗,张宽地,龚家国,赵勇,王浩,范典.坡面薄层水流滚波演变规律试验研究[J].农业机械学报,2016,47(10):156-163.
Yang Miao,Zhang Kuandi,Gong Jiaguo,Zhao Yong,Wang Hao,Fan Dian.Experiment on Evolution Law of Thin Layer Rolling Flow on Slope Surface[J].Transactions of the Chinese Society for Agricultural Machinery,2016,47(10):156-163.
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坡面薄层水流滚波演变规律试验研究   [下载全文]
Experiment on Evolution Law of Thin Layer Rolling Flow on Slope Surface   [Download Pdf][in English]
投稿时间:2016-07-19  
DOI:10.6041/j.issn.1000-1298.2016.10.021
中文关键词:  坡面流  滚波演化  临界水力条件
基金项目:国家自然科学基金项目(51579214、51209222)、流域水循环模拟与调控国家重点实验室自主研究课题项目(2015ZY01、2015TS01)、黄土高原土壤侵蚀与旱地农业国家重点实验室开放基金项目(A314021402—1619)和流域水循环模拟与调控国家重点实验室开放基金项目(IWHR—SKL—2014)
作者单位
杨苗 西北农林科技大学 
张宽地 西北农林科技大学 
龚家国 中国水利水电科学研究院 
赵勇 中国水利水电科学研究院 
王浩 中国水利水电科学研究院 
范典 西北农林科技大学 
中文摘要:为探求坡面薄层水流滚波产生机理及其演化规律,采用变坡水槽试验,结合超声波测量技术,研究了5种坡度和21种单宽流量下坡面薄层水流的水力特性及失稳特征。结果表明,试验条件下,坡面水流流态指数平均值为0.536,水流流态以紊流为主,流型为急流;特定粗糙床面条件下,随着流量的增加,水流经历失稳到滚波猝灭再到二次失稳的演变过程;滚波猝灭临界流量随着坡度的增大而逐渐减小,其临界雷诺数在509~602之间,临界弗汝德数在3.29~7.39之间;随着流程长度的增加,滚波的波速变化不大,波长和波高逐渐增大,频率逐渐减小,滚波发生沿程聚合现象;当单宽流量和坡度增大时,波速和频率均随之增大,波长变幅不大,而波高呈现先增大后减小的抛物线型变化趋势。
Yang Miao  Zhang Ku  i  Gong Jiaguo  Zhao Yong  Wang Hao  Fan Dian
Northwest A&F University,Northwest A&F University,China Institute of Water Resources and Hydropower Research,China Institute of Water Resources and Hydropower Research,China Institute of Water Resources and Hydropower Research and Northwest A&F University
Key Words:overland flow  rolling wave evolution  critical hydraulic condition
Abstract:Based on the variable slopes flume experiment, adopting ultrasonic measurement technique, changes in hydraulic parameters of slope shallow flow were studied at five slopes and 21 unit width discharges from the viewpoint of hydraulic mechanism and stability characteristics. The results showed that the index mean value under test conditions of slope flow was 0.536, the fluid state was turbulent flow, and the flow pattern was specific jet. Under artificial roughness conditions, with the increase of discharge, the evolution of flow was from instability to roll wave quenching and loss stability. During this period, the surface of water flow was changed greatly. The critical flow rate of roll wave quenching was decreased with the increase of slope, and the quenching critical Reynolds number was varied from 509 to 602 and Froude number was varied from 3.29 to 7.39. The critical Reynolds number for unstable laminar flow was ranged from 778 to 961, and Froude number was ranged from 3.57 to 8.47. With the increase of flow length, the variation of wave celerity was small, but the wavelength and wave amplitude were increased, and the frequency was decreased, polymerization was occurred for roll waves along slope distance. When the unit width discharges and slope were increased, wave celerity and frequency were also increased, but the wavelength was changed little, and wave amplitude was changed in the form of single peak. The research results can provide theoretical basis for studying of soil erosion on the slope, and promote the extension of traditional hydraulics theory to overland flow. 

Transactions of the Chinese Society for Agriculture Machinery (CSAM), in charged of China Association for Science and Technology (CAST), sponsored by CSAM and Chinese Academy of Agricultural Mechanization Science(CAAMS), started publication in 1957. It is the earliest interdisciplinary journal in Chinese which combines agricultural and engineering. It always closely grasps the development direction of agriculture engineering disciplines and the published papers represent the highest academic level of agriculture engineering in China. Currently, nearly 8,000 papers have been already published. There are around 3,000 papers contributed to the journal each year, but only around 600 of them will be accepted. Transactions of CSAM focuses on a wide range of agricultural machinery, irrigation, electronics, robotics, agro-products engineering, biological energy, agricultural structures and environment and more. Subjects in Transactions of the CSAM have been embodied by many internationally well-known index systems, such as: EI Compendex, CA, CSA, etc.

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