Vortex Force Map法によるPIV速度場からの非定常空気力推定

抄録

Accurate non-intrusive force measurement is often challenging, particularly in applications involving animals and vehicles. This paper presents a non-intrusive technique leveraging the vortex force map (VFM) method, which calculates forces from snapshot velocity and vorticity fields obtained through particle image velocimetry (PIV). The VFM method is applied to two different kinematic families: surging flat plates and pitching NACA 0018 airfoils at Reynolds numbers of O(104 ). These flowfields are characterised by the shedding of coherent leading-edge and trailing-edge vortices. In both scenarios, the VFM method demonstrates remarkable agreement with direct force measurements. Additionally, we offer physical interpretations of the relationship between forces and vortical structures, drawing on visualised force contributions from each vortex. Notably, the VFM method exhibits high robustness to noise, a crucial feature in experimental fluid mechanics.