Abstract: In order to solve the problem that the fan suckin biolight control lamp can not inhale pests at the entrance, the fluid dynamics simulation of the internal flow field of the existing fan suckin biolight control lamp was carried out by using Fluent software to study the changes of the internal flow field of the fan suckin biolight control lamp under different air inlet angles and fan speeds, the threedimensional model of the fan suckin biolight control lamp was established through Solidworks, and the model was meshed in the Workbench. The simulation analysis of the flow field pressure, trace, velocity and eddy viscosity inside the fan suckin biolight control lamp showed that there were vortices on both sides of the fan of this fan suckin biolight control lamp device, which caused pests to be rolled to the outside of the fan suckin biolight control lamp by the air flow, which was the reason for the low efficiency of the fan suckin biolight control lamp in absorbing pests. By changing the angle of the air inlet of the control lamp, the trace of pests entering the insect collecting bottle could be obtained, it could be shown that under the working condition of 1 800 r/min fan, the pressure of insects being sucked into the insect collecting bottle was 8.25 kN/m2, and the speed of insects being sucked into the insect collecting bottle was 3.6 m/s, when the air inlet was 60°, the trace of pests of the fan suckin biolight control lamp was the most stable, there was no vortex inside the insect collecting bottle, and the pressure inside the insect collecting bottle was all negative, so as to achieve the optimization goal, which can improve the inhalation effect of the control lamp on pests.

Key words: fan suckin biolight control lamp, insect bottle pipe, numerical simulation, flow field simulation； plant protection machinery, pest control

摘要： 针对扇吸式生物光防治灯对入口处害虫无法吸入的问题，利用Fluent软件对现有的扇吸式生物光防治灯内部流场进行流体力学仿真，研究不同进风口角度及风扇不同转速下扇吸式生物光防治灯内部流场的变化。通过Solidworks建立扇吸式生物光防治灯的三维模型，并在Workbench中对模型进行网格划分。对生物光防治灯内部流场压力、迹线、速度及涡流黏度进行仿真分析，发现该种扇吸式生物光防治灯装置在风扇两侧有旋涡，导致害虫被气流卷到扇吸式生物光防治灯的外侧，是造成扇吸式生物光防治灯吸入害虫效率低的原因。通过改变防治灯进风口角度得到害虫进入集虫瓶内部迹线，当1 800 r/min风扇工况下，虫子被吸入集虫瓶的压力为8.25 kN/m2，虫子被吸入集虫瓶的速度为3.6 m/s，进风口60°时，扇吸式生物光防治灯的害虫迹线是最稳定的，集虫瓶内部没有旋涡，且集虫瓶内部的压力全为负值，达到优化目的，可提升防治灯对害虫的吸入效果。

关键词: 扇吸式生物光防治灯, 集虫瓶管道, 数值模拟, 流场仿真, 植保机械, 虫害防控