Development of Agricultural Sprinkler for Use in Volcanic Ash FallingArea

火山灰飘落区农用喷灌机的研制

• 批准号: 11556045
• 负责人: UCHITANI Tomotsu
• 金额: $ 3.58万
• 依托单位: Kagoshima National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11556045/
• 关键词: Sprinkler; Agricultural Engineering; Jet; Fluidics; Flow visualization

This study is on the new type of an agricultural sprinkler for use in the volcanic ash falling area. In the first and second year of this study new several types of sprinkler have been made. The distribution of the watering volume and the degree of droplet of the water have been measured by using these types of sprinklers. As a result, it has been clarified that the geometrical configuration such as the nozzle exit width or the diameter of the sprinkler affect largely on these characteristics of the watering. In this year the flow visualization inside of these sprinklers has been done by using the visualization information system composed of the YAG-laser system, the high speed camera and the image processing system. By using these digital information the relationship between the geometrical configuration of the sprinkler and the maximum angle of the watering has been investigated. The results obtained in this study are as follows ;(1) In the case of the ellipse type sprinkler which is flattened laterally and has the major axis of the 52mm, the watering angle becomes maximum(2) In the case of the ellipse type sprinkler which is flattened longitudinally, the watering angle degrees monotonously.(3) When the difference of the vorticity of the vortices generating in both sides of the vortex chamber becomes large, the watering angle shows the maximum value.

本文研究了一种用于火山灰坠落区的新型农业喷头。在这项研究的第一年和第二年，已经制造了几种新的喷头。用这种喷头测量了喷头的水量分布和水滴程度。结果表明，喷头出口宽度或喷头直径等几何形状对喷头的这些特性有很大影响。今年利用由激光系统、高速摄像机和图像处理系统组成的可视化信息系统对喷头内部的流动进行了可视化。利用这些数字信息，研究了喷头几何形状与最大喷头倾角之间的关系。研究结果表明：(1)当喷头长轴为52 mm时，椭圆喷头洒水角最大；(2)椭圆喷头纵向压扁时，洒水角单调增大；(3)当涡室两侧产生的涡量差较大时，洒水角最大。

项目成果

NAKASHIMA, M., et al.: "Study on Sprinkler for Removing Small Particle"Proceedings of 4th International Symposium on Particle Image Velocimetry. 1-6 (2001)

NAKASHIMA, M., et al.: “Study on Sprinkler for Removing Small Particle”第四届国际粒子图像测速研讨会论文集。

NAKASHIMA, M. et al.: "Study on Sprinkler for Removing Small Particle"Proc. 4th Inti. Symp. on Particle Image Velocimetry. 1-6 (2001)

NAKASHIMA, M. 等人：“用于去除小颗粒的洒水器的研究”Proc。

NAKASHIMA M., et al.: "Study on Sprinkler for Removing Small Particle (PIV Analysis on Flow in Fundamental Element)"Proceedings of 4th Intl. Sym. on Particle Image Velocimetry. 1-6 (2001)

NAKASHIMA M.等人：“用于去除小颗粒的洒水器的研究（基本元素流动的PIV分析）”第四届国际会议论文集。