Nonlinear supersonic indicial response of diamond airfoils

Supersonic flows around diamond airfoils, under large-amplitude step motion, are analytically studied. Nine regions with distinct flow structures are identified on each side. These regions include intricate wave structures and significantly shape the indicial response. The novelty of this work is to...

Full description

Saved in:
Bibliographic Details
Published in:Acta mechanica 2020-06, Vol.231 (6), p.2125-2141
Main Authors: Li, Sheng, Bai, Chen-Yuan, Wu, Zi-Niu
Format: Article
Language:English
Subjects:
Aerodynamic forces
Aerodynamics
Analysis
Classical and Continuum Physics
Computational fluid dynamics
Control
Diamond crystals
Diamonds
Dynamical Systems
Engineering
Engineering Fluid Dynamics
Engineering Thermodynamics
Heat and Mass Transfer
Model accuracy
Nonlinear response
Original Paper
Solid Mechanics
Supersonic flow
Theoretical and Applied Mechanics
Vibration
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Supersonic flows around diamond airfoils, under large-amplitude step motion, are analytically studied. Nine regions with distinct flow structures are identified on each side. These regions include intricate wave structures and significantly shape the indicial response. The novelty of this work is to develop theoretical models, capable of describing each region’s wave speed, pressure, and force. We achieve this by correcting the linear solution to the problem and incorporating nonlinear effects of large angle and airfoil thickness. Our model reports good accuracy regarding the computational fluid dynamics. And three stages, which are predicted by this model, precisely capture important features of aerodynamic force evolution.
ISSN:0001-5970
1619-6937
DOI:10.1007/s00707-020-02637-3