农业机械学报2011，Vol.42Issue(4)：70-75,6.
喷杆喷雾机风助风筒流场分析与结构优化
Air Flow Simulation and Flow Field optimization for Airduct of Air-assisted Boom Sprayer
摘要
Abstract
To improve the drawbacks of original designed air-assisted duct of boom sprayer, such as huge wind consumption, low efficiency, large coefficient variation (CV) of wind velocity, 3-D flow field of interior duct and exterior free flow region was simulated by using computational fluid dynamics ( CFD). Flow field analysis of the simulation results showed that there were strong swirling and narrow flow channel in the flow field of prototype air-assisted duct. It also resulted in large CV in exterior free flow field. In response to these shortcomings, two kinds of improvement designs were proposed. Firstly, the outlet size and outlets spacing was decreased to greatly reduce the C V of wind velocity, but could not fundamentally change the flow structure. Secondly, on the basis of above optimization, a flow deflector was added to overcome the strong swirling flow and narrow flow channel. Prototype testing indicated that final scheme achieved high efficiency and small wind speed variations.关键词
喷杆喷雾机/风助风筒/计算流体动力学/导流板/流场分析Key words
Boom sprayer/ Air-assisted duct/ Computational fluid dynamics/ Flow deflector/ Flow field analysis分类
农业科技引用本文复制引用
刘雪美,张晓辉,侯存良..喷杆喷雾机风助风筒流场分析与结构优化[J].农业机械学报,2011,42(4):70-75,6.基金项目
农业部农药化学与应用重点开放实验室资助项目(MOAPCA201001)和山东省科技攻关计划资助项目(2007GG10009001) （MOAPCA201001）
