孙志林,李众彻,方诗标,许丹.农业退水分层利用装置设计与数值模拟[J].农业机械学报,2017,48(6):203-209.
SUN Zhilin,LI Zhongche,FANG Shibiao,XU Dan.Device Design and Numerical Simulation of Agricultural Wastewater Layered Utilization[J].Transactions of the Chinese Society for Agricultural Machinery,2017,48(6):203-209.
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农业退水分层利用装置设计与数值模拟   [下载全文]
Device Design and Numerical Simulation of Agricultural Wastewater Layered Utilization   [Download Pdf][in English]
投稿时间:2016-09-23  
DOI:10.6041/j.issn.1000-1298.2017.06.026
中文关键词:  农业退水  分流装置  排碱渠  数值模拟  盐碱地
基金项目:高等学校博士学科点专项科研基金项目(2120101110108)、中央高校基本科研业务费专项资金项目(2015XZZX002-01)和水体污染控制与治理科技重大专项(2009ZX07424-001)
作者单位
孙志林 浙江大学港口海岸与近海工程研究所 
李众彻 浙江大学港口海岸与近海工程研究所 
方诗标 浙江大学港口海岸与近海工程研究所 
许丹 浙江大学港口海岸与近海工程研究所 
中文摘要:从理论可行性出发,初步设计一种分流装置,再从功能和效率的角度对其进行改进,最后采用计算流体力学软件Fluent对农业退水分流过程进行数值模拟,对比分析不同流速下的盐度场和速度场,结果表明该分流装置可为最终设计提供参考。试验工况分3组进行,设定入口流速作为唯一变量,3组试验均假定相同的入口盐度分布函数。截取2个Y轴剖面的流速场云图和4个X轴剖面的盐度场云图进行对比分析。结果表明,分流装置可以对不同盐度的农业退水进行分流。上导流槽得到低盐度农业退水,下导流槽得到较高盐度退水。分流的效率取决于装置尺寸、分层流流速和盐度分布等因素,可根据实际情况进行调整和优化。
SUN Zhilin  LI Zhongche  FANG Shibiao  XU Dan
Institute of Port, Coastal and Offshore Engineering, Zhejiang University,Institute of Port, Coastal and Offshore Engineering, Zhejiang University,Institute of Port, Coastal and Offshore Engineering, Zhejiang University and Institute of Port, Coastal and Offshore Engineering, Zhejiang University
Key Words:agricultural wastewater  shunting device  alkali draining ditches  numerical simulation  saline land
Abstract:The rainfall in the south region of Xinjiang is rare which caused severe problems of soil salinization. The salt leaching of farmland and wastewater draining from irrigating farmland are rich in sodium which indirectly leads to the ecological pollution. To effectively deal with the excessive salinity of agricultural wastewater from alkali draining ditches, a shunting device was invented. Firstly, the feasibility of the theory to design the preliminary device was introduced. Secondly, improvement of the device in its functionality and efficiency was given. Finally, numerical simulation of the streaming process of agricultural wastewater based on the computational fluid dynamics utilizing the software fluent was obtained. The derived results were used for the ultimate design of the shunting device. The test conditions were categorized into three groups. The inlet flow rate was set as the only variable, and the spatial distribution of inlet salinity among three groups was assumed to be identical. Two Y axis sectional velocity field cloud diagrams and four X axis sectional salinity field cloud diagrams were selected for detailed comparison. It showed that the shunting device can separate water based on salinity distribution, and agricultural wastewater with low salinity was obtained from the lower diversion trench, vice versa. The efficiency of the shunting device depended on its size, stratification flow velocity and salinity distribution. Adjustment and optimization should be subjected to the actual situation.

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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