File(s) not publicly available

Reason: This item is currently closed access.

Measurement of a bluff body aerodynamic yaw moment magnification and damping using a dynamic wind tunnel facility

journal contribution
posted on 03.10.2014 by Shuhaimi Mansor, Martin Passmore
This paper describes a technique for determining the dynamic aerodynamic yaw moment derivative based on the time response data using an oscillating model rig. The aerodynamic yaw moment derivatives are initially estimated using oscillation frequency and amplitude decay. The results from the dynamic measurement are compared with conventional static test and presented in the form of aerodynamic magnification. The yaw moment derivative exceeds that determined statically across reduced frequency range measured. The yaw damping derivative was found to be a function of freestream speed; at low velocities it is negative but progressively increases to a positive value. With further increases in speed, a self-sustained oscillation is observed with almost constant frequency and amplitude. This result is attributed to coupling between the model wake and the model stability; however, the exact behavior of the interaction is not fully understood; this phenomenon is under further investigation.

History

School

  • Aeronautical, Automotive, Chemical and Materials Engineering

Department

  • Aeronautical and Automotive Engineering

Published in

JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME

Volume

78

Issue

3

Pages

? - ? (6)

Citation

MANSOUR, S. and PASSMORE, M.A., 2011.Measurement of a bluff body aerodynamic yaw moment magnification and damping using a dynamic wind tunnel facility. Journal of Applied Mechanics, 78 (3), 031004.

Publisher

© American Society of Mechanical Engineers (ASME)

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2011

Notes

This article is closed access.

ISSN

0021-8936

Language

en

Exports