Humans' initial desire for flight stems from the imitation of flying creatures in nature. The
excellent flight performance of flying animals will inevitably become a source of inspiration …

In a large variety of fluid-dynamic problems, it is often impossible to directly measure the
instantaneous aerodynamic or hydrodynamic forces on a moving body. Examples include …

In this study, we developed a general method for estimating the unsteady aerodynamic
forces on elongated bodies in grid-generated turbulent flow. The key to this method is the …

The ready availability of full-field velocity measurements in present-day experiments has
kindled interest in using such data for force estimation, especially in situations where direct …

The concept of added mass arises from potential flow analysis and is associated with the
acceleration of a body in an inviscid irrotational fluid. When shed vorticity is modeled as …

Flapping wings enable flying animals and biomimetic robots to generate elevated
aerodynamic forces. Measurements that demonstrate this capability are based on …

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 …

The vortex dynamics and lift force generated by a sinusoidally heaving and pitching airfoil
during dynamic stall are experimentally investigated for reduced frequencies of k= fc/U_ ∞ …

The instantaneous pressure fields and aerodynamic loads are obtained for rotating airfoils
from time-resolved particle image velocimetry (TR-PIV) measurements. These allowed …

Vortical impulse theory is used to investigate the relationship between turbine thrust and the
near-wake velocity and vorticity fields. Three different hypotheses regarding the near-wake …