摘要
野外试验时发现,蝗虫在吸捕的过程中有逃逸现象,并且主要出现在吸头两侧,因而吸捕率的高低跟吸捕机两侧流场的分布有密切关系。从吸嘴水平面更能直观地观察出吸头两侧流场的分布情况,利用Fluent软件中的RNGk-ε湍流模型对吸嘴水平面流场进行数值模拟,并结合试验数据分析草地蝗虫吸捕机吸头两侧流场的速度分布规律,寻求解决蝗虫两侧逃逸问题的最佳方法,同时证明该数值算法的可靠性。
It was found that the locust escaped in the field experiment mainly from the both sides of suction head, so the suction trap rate of pneumatic grassland locust suction trap machine closely related with the flow field of suction head. At the horizontal level of suction mouth, the flow field distributed on both sides of the suction head could be more directly observed. Making use of RNG turbulent model of CFD software to numerical simulation and combining the experiment data, this study aimed to analyze the velocity distributing rule of flow field in order to find the best way in resolving locust escaping problem and show the reliabilities of the turbulent model and numerical simulation method.
出处
《安徽农业科学》
CAS
北大核心
2009年第4期1678-1680,1742,共4页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金资助项目(50265002)
关键词
蝗虫吸捕机
吸嘴水平面
流场
数值模拟
Locust suction trap machine
Horizontal level of the suction mouth
Flow field
Numerical simulation
