Drained aeroelastic aircraft models
Aerodynamics and heat-exchange processes in flying vehicles
National Research Center "Zhukovsky Institut", 1, Zhukovsky str, Zhukovsky, Moscow Region, 140180, Russia
Drained dynamically scaled models have been designed to study aircraft unsteady aerodynamic performance in wind tunnels. Nowadays this kind of experimental research is preferred for future aircraft both flutter and buffeting safety studies, along with verification of CFD methods with allowance for the structural elasticity.
While drained dynamically scaled models developing a number of requirements, including geometric, mass, stiffness and dynamic similarity, should be met. Furthermore, additional requirements for safety margins and high fidelity of measurements are implied.
In the Laboratory of Dynamic Modeling of the Central Aerohydrodynamic Institute several models have been designed and manufactured:
— Drained dynamically scaled model of short-range passenger aircraft wing
— Drained reference dynamically scaled model of transport category aircraft wing
— Drained dynamically scaled model of short-range passenger aircraft horizontal tail
— Drained dynamically scaled model of medium-range passenger aircraft flap
The creation of drained dynamically scaled models became possible through the use of advanced polymer composite materials and FDM (Fused Deposition Modeling) additive technologies. Verification of the model geometrical characteristics is carried out on a coordinate measuring machine.
The results of this work are as follow:
Design of new-generation drained dynamically scaled models with the use of polymer composites and additive technologies.
Design and manufacturing technology development of drained removable blocks and inserts for dynamic pressure sensors installed in the model main load-bearing structure.
Experimental studies of buffeting and unsteady aerodynamic loads with the use of the developed models in T-128 wind tunnel were performed in the range of Mach numbers conforming to the transonic flight.
Keywords:aeroelasticity, model, additive technology, time-dependent loads, aerodynamic experiment, composite materials
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