ANALYSIS OF THE VARIATIONS OF THE WING LIFT COEFFICIENT OF UNMANNED AERIAL VEHICLES WITH INCREASING REYNOLDS NUMBER OF AIRFLOW

Abstract

Unmanned aerial vehicles (UAVs) are one of the fastest growing segments of the aviation market. The concept of UAV development includes military and civilian applications. According to these objectives, the criteria for selecting parameters for micro and mini-UAVs are primarily range and flight duration. Consequently, micro and mini-UAVs should have a high level of aerodynamic quality. The usual behavior of the maximum lift coefficient (СL) of wing profiles with increasing Reynolds number is an increase. However, in some cases, the wing profiles may show the opposite - a decrease in the maximum lift coefficient (CL) with increasing Reynolds number (Re). We have analyzed this effect for a finite span wing and for a wing profile segment.