چكيده لاتين :
The feasibility of using a stand alone Fluidic Thrust- Vectoring (FTV)
system for the purpose of longitudinal trim of an unmanned aerial vehicle
is the [ocus of the research presented in this paper. Since the fluidic thrust
vectoring requires high pressure secondary air to deflect the engine exhaust
gases, this research also provides an analytical toolset for the preliminary sizing
of a suitable secondary air supply. The study is based on a conceptual model
of a Vertical Take-Off and Landing (VTOL) Tail-sitter type unmanned aerial
vehicle in three common phases of flight named as Hovering, Transition and
Cruise. A relationship is finally presented between the thrust-vectoring angle
and the required secondary mass flow rate.
It is found that, just by use of FTV system the aircraft trim is possible.
In addition. the mathematical model developed in this study can be used ali
a preliminary tool for overall performance evaluation of such a conceptual
aircraft, especially for sensitivity analysi8 of thrust-vectoring control and finding
the optimum values of the parameterיs like centre of gravity and engine location.
