李云开,王伟楠,孙昊苏.再生水滴灌毛管内颗粒-管壁碰撞特性研究[J].农业机械学报,2015,46(9):159-166.
Li Yunkai,Wang Weinan,Sun Haosu.Particle-Wall Collision Characteristics Influenced by Biofilms in Drip Irrigation Laterals with Reclaimed Water[J].Transactions of the Chinese Society for Agricultural Machinery,2015,46(9):159-166.
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再生水滴灌毛管内颗粒-管壁碰撞特性研究   [下载全文]
Particle-Wall Collision Characteristics Influenced by Biofilms in Drip Irrigation Laterals with Reclaimed Water   [Download Pdf][in English]
投稿时间:2015-01-06  
DOI:10.6041/j.issn.1000-1298.2015.09.023
中文关键词:  再生水 滴灌 毛管 碰撞特性 颗粒物 生物膜
基金项目:国家自然科学基金资助项目(51179190)和公益性行业(农业)科研专项经费资助项目(201401078)
作者单位
李云开 中国农业大学 
王伟楠 中国农业大学 
孙昊苏 中国农业大学 
中文摘要:利用三维白光干涉形貌仪对滴灌系统中光滑毛管管壁、未使用过的毛管管壁、附生生物膜的毛管管壁3种壁面进行表面形貌测试,在此基础上借助相位多普勒粒子分析仪研究了3种壁面条件下,3种粒径颗粒与壁面碰撞规律。结果表明:生物膜管壁的比表面积(212%)显著高于毛管管壁(4.37%)及光滑管壁(0.196%);细颗粒(粒径为10μm)与光滑管壁碰撞的平均速度低于生物膜管壁,且表现出光滑管壁、毛管管壁、生物膜管壁速度概率分布逐渐变宽的趋势,而中(粒径为50μm)、粗(粒径为100μm)两种颗粒物平均速度接近于零,概率密度分布未出现明显变宽趋势,说明附生生物膜对粒径高于50μm的颗粒物运移影响不显著。
Li Yunkai  Wang Weinan  Sun Haosu
China Agricultural University,China Agricultural University and China Agricultural University
Key Words:Reclaimed water Drip irrigation Capillary tube Collision characteristics Particles Biofilm
Abstract:The Phase Shift Micro XAM-3D was used to measure the roughness of smooth wall, new lateral wall and lateral wall attached by biofilm. The phase Doppler particle anemometer was used to measure the particle movement with the effect of different walls. The study used three different particle sizes: 10μm, 50μm, 100μm under three different walls. The results showed that the surface area of biological lateral wall (212%) was significantly higher than that of new lateral wall (4.37%) and smooth wall (0.196%). The velocity of small particles (particle size of 10μm) collided with smooth wall was lower than that collided with the biofilm lateral wall. The velocity distribution of smooth wall, new lateral wall and biofilm lateral wall tended to be gradually wider and wider. While the average velocities of middle particles (50μm) and big particles (100μm) are closed to zero and didn’t widen. The reason is that the biofilm enhanced the surface adsorption capacity which reduced the number of small particles. The result proved that the effect of biofilm on big particles was not significant.

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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