The physics of modeling unsteady flaps with gaps

N Liggett, MJ Smith - Journal of Fluids and Structures, 2013 - Elsevier
Research indicates that active control concepts have promise in mitigating numerous
adverse phenomena associated with the aeromechanics of lifting surfaces. These …

A new study on the gap effect of an airfoil with active flap control based on the overset grid method

Z Hu, G Xu, Y Shi - International Journal of Aeronautical and Space …, 2021 - Springer
Rotors with active flap control have considerable potential in reducing vibration and noise
and improving aerodynamic performance. However, due to the movement of the flap, there …

[HTML][HTML] Interference mechanism of trailing edge flap shedding vortices with rotor wake and aerodynamic characteristics

LIU Yang, SHI Yongjie, A Aqib, XU Guohua… - Chinese Journal of …, 2024 - Elsevier
Abstract A robust Reynolds-Averaged Navier-Stokes (RANS) based solver is established to
predict the complex unsteady aerodynamic characteristics of the Active Flap Control (AFC) …

Shape optimization under uncertainty of morphing airfoils

F Fusi, PM Congedo, A Guardone, G Quaranta - Acta Mechanica, 2018 - Springer
This paper is devoted to the formulation of a novel optimization under uncertainty framework
for the definition of optimal shapes for morphing airfoils, applied here to advancing/retreating …

Investigation of trailing-edge flap gap effects on rotor performance using high-fidelity analysis

R Jain, H Yeo, I Chopra - Journal of aircraft, 2013 - arc.aiaa.org
Effects of trailing-edge flap gaps on rotor performance are investigated using a high-fidelity
coupled computational fluid dynamics computational structural dynamics analysis. Both …

Higher-harmonic deployment of trailing-edge flaps for rotor-performance enhancement and vibration reduction

F Kody, E Corle, MD Maughmer, S Schmitz - Journal of Aircraft, 2016 - arc.aiaa.org
A computational method involving evolutionary-based optimization to provide an optimal set
of higher-harmonic deployment schedules for a multisegment trailing-edge flap is …

Study of gap physics of airfoils with unsteady flaps

N Liggett, MJ Smith - Journal of aircraft, 2013 - arc.aiaa.org
Active trailing-edge flaps are a method of aerodynamic control under extensive research to
reduce the detrimental effects of dynamic stall. Physical phenomena are poorly understood …

Modeling of oscillating control surfaces using overset-grid-based Navier–Stokes equations solver

GP Guruswamy - Journal of Dynamic Systems …, 2017 - asmedigitalcollection.asme.org
A modular procedure is presented to simulate moving control surfaces within an overset grid
environment using the Navier–Stokes equations. Gaps are modeled by locally shearing the …

直升机旋翼/机体动稳定性研究进展

贺天鹏, 李书, 李小龙 - 力学与实践, 2013 - lxsj.cstam.org.cn
首先对直升机旋翼/机体动不稳定性问题的种类进行了简要概述, 包括旋翼挥舞/变距, 变距/摆振,
挥舞/摆振和挥舞/摆振/变距耦合等孤立旋翼动不稳定性问题, 以及直升机地面共振和空中共振等 …

Control surface modeling and large-eddy simulation: Enhancing accuracy and efficiency in aerodynamic analysis

L Streher - 2024 - research.rug.nl
Over the past few years, the increasingly severe impacts of climate change have driven a
growing global concern for environmental protection. Amidst this urgent global concern, the …