Quantifying non-linearity in planar supersonic potential flows

Meijer, Marius C. and Dala, Laurent (2017) Quantifying non-linearity in planar supersonic potential flows. The Aeronautical Journal, 121 (1237). pp. 372-394. ISSN 0001-9240

[img]
Preview
Text (Full text)
Meijer, Dala - Quantifying nonlinearity in planar supersonic potential flows AAM.pdf - Accepted Version

Download (523kB) | Preview
Official URL: https://doi.org/10.1017/aer.2016.141

Abstract

An analysis is presented which allows the engineer to quantitatively estimate the validity bounds of aerodynamic methods based in linear potential flows a-priori. The development is limited to quasi-steady planar flows with attached shocks and small body curvature. Perturbation velocities are parameterised in terms of Mach number and flow turning angle by means of a series-expansion for flow velocity based in the method of characteristics. The parameterisation is used to assess the magnitude of non-linear term-groupings relative to linear groups in the full potential equation. This quantification is used to identify dominant nonlinear terms and to estimate the validity of linearising the potential flow equation at a given Mach number and flow turning angle. Example applications include the a-priori estimation of the validity bounds for linear aerodynamic models for supersonic aeroelastic analysis of lifting surfaces and panels.

Item Type: Article
Subjects: H300 Mechanical Engineering
H400 Aerospace Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Paul Burns
Date Deposited: 16 Aug 2017 14:55
Last Modified: 10 Sep 2017 17:51
URI: http://nrl.northumbria.ac.uk/id/eprint/31621

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year

View more statistics


Policies: NRL Policies | NRL University Deposit Policy | NRL Deposit Licence