This paper presents the extension of Kutta–Joukowski theorem to unsteady linear aerodynamics. Starting from formulation developed by Theodorsen for solution velocity potential circulatory flows around thin, rectilinear airfoils, frequency response function between bound circulation and lift is derived. To provide a suitable time-domain applications, two finite-state approximations function, wit...

The classical Joukowski transformation plays an important role in different applications of conformal mappings, in particular in the study of flows around the so-called Joukowski airfoils. In the 1980s H. Haruki and M. Barran studied generalized Joukowski transformations of higher order in the complex plane from the view point of functional equations. The aim of our contribution is to study the...

There are three common methods for calculating the lift generated by a flying animal based on the measured airflow in the wake. However, these methods might not be accurate according to computational and robot-based studies of flapping wings. Here we test this hypothesis for the first time for a slowly flying Pacific parrotlet in still air using stereo particle image velocimetry recorded at 100...

Combined with the cuckoo search algorithm (CSA) and Kutta–Joukowski (KJ) theorem, a CSA-KJ optimization method was proposed to improve airfoil aerodynamic characteristics in this work. The fourth-order constant-free polynomial function employed describe profile. KJ loop lift of taken as objective function, CSA applied iteratively update method, which used optimize NACA4412 airfoil. results demo...