**6. Conclusions**

Air flow interaction with flat blades and space prisms that perform translation motion was studied using the concept of zones (pressure and suction zones) for a rigid body immersed in an air flow. This method allows to solve problems of non-stationary body-air flow interaction without requiring intensive and laborious "space–time" programming techniques.

The air flow–rigid body interaction theory has been tested in computer modeling of two-dimensional and three-dimensional problems. Applicability of the proposed formulas for engineering calculations of interaction forces (drag forces) are confirmed by experiments with physical models of air flow devices in the wind tunnel.

New wind energy conversion devices are designed. The operation principle of these devices is based on the utilization of flat blades translation motion due to the interaction with air flow.
