The aerodynamic loads on a flexible wing in terms of the surface pressure distribution and lift force along span are determined experimentally based non-intrusive Lagrangian particle tracking (LPT) measurements. As deforms under loads, its deformed shape is first reconstructed structural LPT measurements conducted together with flow an integrated approach. Based shape, tracers data collected no...

Flying animals exploit highly nonlinear dynamics to achieve efficient and robust flight control. It appears that the distributed flow force sensor arrays found in flying are instrumental enabling this performance. Using a wind-tunnel wing model instrumented with of strain pressure sensors, we characterized relationship between signals aerodynamic load-related variables. Estimation approaches ba...

Aerodynamic forces on bridges are commonly separated into static, self-excited, and buffeting force components. By delving into the relationships among force descriptors for static, self-excited, and buffeting components, novel perspectives are developed to unveil the subtle underlying complexities in modeling aerodynamic forces. Formulations for airfoil sections and those based on quasisteady ...

ASWING is a program for the prediction of static and quasi-static loads and deformations of aircraft with flexible high aspect ratio surfaces and fuselage beams. The key features of the overall structural/aerodynamic model are sketched in Figure 1. A fully nonlinear Bernoulli-Euler beam representation is used for all the surface and fuselage structures, and an enhanced lifting-line representati...

An inviscid double wake model based on a steady two-dimensional panel method has been developed to predict aerodynamic loads of wind turbine airfoils in the deep stall region. The separated flow is modelled using two constant vorticity sheets which are released at the trailing edge and at the separation point. A calibration of the code through comparison with experiments has been performed usin...

This paper presents a time-accurate procedure for computing unsteady aerodynamic forces on wings with a full-span oscillating control surface by using sheared grids. In this procedure, the flow is computed by solving the unsteady Reynolds-Averaged Navier-Stokes (RANS) equations in conjunction with the one-equation Spalart-Allmaras turbulence model. A module to model control surface oscillations...

A growing body of evidence indicates that a majority of insects experience some degree of wing deformation during flight. With no musculature distal to the wing base, the instantaneous shape of an insect wing is dictated by the interaction of aerodynamic forces with the inertial and elastic forces that arise from periodic accelerations of the wing. Passive wing deformation is an unavoidable fea...

Pressure measurements over flapping wings are less commonly available due to the difficulties associated with instrumenting them. This represents an important limitation of the aerodynamic data available for the development of self-contained flapping wing vehicle autopilots and for researchers working on the aerodynamics of bio-inspired flapping wings. This paper describes the design, construct...