Abstract
In this paper we examined the rotor aerodynamic characteristics of some devices for collection of the Colorado potato beetle and its larvae, consisting of a casing in the form of an oval, separated at the top, and a device, through which the casing arranged inside the airflow. The executed theoretical studies devoted to determining the necessary speed-fall of larvae and beetles, computer modeling of air flow inside the device to identify a rational form of housing and assess the impact of the presence of bushes on the velocity field. According to studies the authors prepared a formula and fall velocity values, depending on the orientation and size of insects in space. It was established that the rate of upflow of υ> 35 m/s provides puffing as adults and larvae, irrespective of their orientation in the housing. In the simulation of air flow within the enclosure, the system of hydrodynamic equations were solved by finite element method using the members of the software packages Salome and OpenFoam of freeware CAE-Linux distribution. It was established that the first in the center upward flow with the velocity of 35m/s is implemented, that blows bush. After that, the flow “leaves” to the right, because the bush creates a drag not symmetrical about a vertical plane, passing through the horizontal axis of the housing. Further in the device a stable motion flow counterclockwise was formed. The obtained results allow to further substantiate the rational form of housing and basic structural and technological parameters of rotor device for collecting the Colorado potato beetle and its larvae.
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