张慧春,Dorr Gary,郑加强,周宏平.扇形喷头雾滴粒径分布风洞试验[J].农业机械学报,2012,43(6):53-57,52.
Zhang Huichun,Dorr Gary,Zheng Jiaqiang,Zhou Hongping.Wind Tunnel Experiment of Influence on Droplet Size Distribution of Flat Fan Nozzles[J].Transactions of the Chinese Society for Agricultural Machinery,2012,43(6):53-57,52.
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扇形喷头雾滴粒径分布风洞试验   [下载全文]
Wind Tunnel Experiment of Influence on Droplet Size Distribution of Flat Fan Nozzles   [Download Pdf][in English]
  
DOI:10.6041/j.issn.1000-1298.2012.06.010
中文关键词:  扇形喷头  参考喷头  风洞试验  雾滴粒径分布
基金项目:“十二五”国家科技支撑计划资助项目(2012BAD19B08、2012BAD19B20)、国家林业公益性行业科研专项经费资助项目(201004052、200904051)、江苏省教育厅科研成果产业化资助项目(JHB2011-12)、江苏高校优势学科建设工程资助项目和江苏省有害生物入侵预防与控制重点实验室开放课题资助项目(PMIS200904)
作者单位
张慧春 南京林业大学
澳大利亚昆士兰大学 
Dorr Gary 昆士兰大学 
郑加强 南京林业大学 
周宏平 南京林业大学 
中文摘要:利用开路式风洞系统和Sympatec激光粒度仪测试了参考喷头的雾谱尺寸以此作为喷头雾谱等级的依据。对扇形雾喷头在不同压力、风速、喷头与激光粒度仪距离情况下的雾滴粒径、数量和范围进行了试验。试验结果表明,压力、风速、喷头与激光粒度仪之间距离的增大,都导致扇形雾喷头的雾滴体积中径变小,尺寸小于150μm的雾滴占全部雾滴体积的百分比变大,增加了农药脱靶飘移的可能性,同时压力和风速的增大都导致部分喷头的雾谱等级降低。为了保证激光粒度仪对雾滴粒径测试结果的可靠性,可以使用风洞试验和调整喷头与激光粒度仪的距离,来减小因细小雾滴通过激光束过程中速度迅速衰减而对测量结果带来的影响。
Zhang Huichun  Dorr Gary  Zheng Jiaqiang  Zhou Hongping
Nanjing Forest University;The University of Queensland;Nanjing Forest University;Nanjing Forest University
Key Words:Flat fan nozzle, Reference nozzle, Wind tunnel experiment, Droplet size distribution
Abstract:To research the influence of spray operation parameters on droplet size distribution of flat fan nozzle, experiments were conducted by using an open circuit wind tunnel and a Sympatec laser diffraction analyzer. The droplet size of reference nozzle was tested to classify the nozzles’ spray spectra. The droplet size distribution generated by different types of nozzles at different spraying pressure for different wind speed with various distances between the nozzle and the laser beam was analyzed. Experimental results showed that the VMD and percentage of the total volume contained in droplet sizes less than 150μm increased with the increasing of the spray pressure, wind speed and distances between the nozzle and the laser beam. Moreover, the classifications of nozzle’s spray spectrum became lower when the pressure and wind speed rose. The distance between the nozzle and the laser beam and wind tunnel experiment could be used to ensure the accuracy and reliability of measurement results when the laser diffraction analyzer was used to test the droplet size. 

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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