Spray nozzle is a key component in equipment for plant protection and water-saving irrigation. The fan nozzle is a kind of spray nozzle, which is widely used in agriculture and forestry for irrigation and control of d...Spray nozzle is a key component in equipment for plant protection and water-saving irrigation. The fan nozzle is a kind of spray nozzle, which is widely used in agriculture and forestry for irrigation and control of diseases, insects, and weeds. In consideration of the increasing velocity of the flow field, when the hydraulic pressure remains unchanged and the flow path becomes narrow, and because the increase of the velocity of spray drops can increase the penetrability of spray drops into the plant canopy, a kind of new fan nozzle with multi entries and simple inner structure was designed and the influences of its structure parameters on the inner flow field were analyzed using FLUENT software. The experimental results showed that the influence of the throat length on the inner flow field of the nozzle was insignificant, while the orifice grooving degree had a significant effect on inner flow field of the nozzle. The larger the grooving degree was, the smaller the pressure and velocity of internal flow field of the nozzle. The nozzle throat length had little influence on the velocity change of internal flow field. Positive correlation was shown between throat length and flow field velocity.展开更多
利用Solid Works建立并简化切段式甘蔗收割机采用的轴流风机排杂装置的三维模型后,通过Solid Works Flow Simulation软件模拟分析轴流风机排杂装置的内部流场情况。根据实际情况设置仿真边界条件,模拟在不同叶轮转速、轮毂垂入导风罩深...利用Solid Works建立并简化切段式甘蔗收割机采用的轴流风机排杂装置的三维模型后,通过Solid Works Flow Simulation软件模拟分析轴流风机排杂装置的内部流场情况。根据实际情况设置仿真边界条件,模拟在不同叶轮转速、轮毂垂入导风罩深度等参数影响下排杂装置的出风口速度场和压力场分布,并比较模拟数据和试验测试结果,为切段式甘蔗收割机的轴流风机排杂装置的设计和优化提供参考。展开更多
文摘Spray nozzle is a key component in equipment for plant protection and water-saving irrigation. The fan nozzle is a kind of spray nozzle, which is widely used in agriculture and forestry for irrigation and control of diseases, insects, and weeds. In consideration of the increasing velocity of the flow field, when the hydraulic pressure remains unchanged and the flow path becomes narrow, and because the increase of the velocity of spray drops can increase the penetrability of spray drops into the plant canopy, a kind of new fan nozzle with multi entries and simple inner structure was designed and the influences of its structure parameters on the inner flow field were analyzed using FLUENT software. The experimental results showed that the influence of the throat length on the inner flow field of the nozzle was insignificant, while the orifice grooving degree had a significant effect on inner flow field of the nozzle. The larger the grooving degree was, the smaller the pressure and velocity of internal flow field of the nozzle. The nozzle throat length had little influence on the velocity change of internal flow field. Positive correlation was shown between throat length and flow field velocity.
文摘利用Solid Works建立并简化切段式甘蔗收割机采用的轴流风机排杂装置的三维模型后,通过Solid Works Flow Simulation软件模拟分析轴流风机排杂装置的内部流场情况。根据实际情况设置仿真边界条件,模拟在不同叶轮转速、轮毂垂入导风罩深度等参数影响下排杂装置的出风口速度场和压力场分布,并比较模拟数据和试验测试结果,为切段式甘蔗收割机的轴流风机排杂装置的设计和优化提供参考。
