First principle analysis of Coandă Micro Air Vehicle aerodynamic forces for preliminary sizing
Aircraft Engineering and Aerospace Technology
ISSN: 0002-2667
Article publication date: 6 March 2017
Abstract
Purpose
The purpose of this paper is to reformulate the governing equations incorporating major variables and parameters for the design a Micro Air Vehicle (MAV), to meet the desired mission and design requirements.
Design/methodology/approach
Mathematical models for various spherical and cylindrical Coandă MAV configurations were rederived from first principles, and the performance measures were defined. To verify the theoretical prediction to a certain extent, a computational fluid dynamic (CFD) simulation for a Coandă MAV generic models was performed.
Findings
The major variables and parameters of Coandă MAV have been formulated into practical guidelines, which relate the lift (or thrust) produced for certain input variables, particularly the Coandă MAV jet momentum coefficient. The influences of the geometrical parameters are elaborated.
Research limitations/implications
The present analysis on Coandă jet-configured MAV is focused on the lift generation due to the Coandă jet effect through a meticulous analysis. The effects of viscosity, the Coandă jet thickness, the radius of curvature of the surface and the stability of Coandă jet are not considered and will be the subject of the following work.
Practical implications
The results obtained can be used for sizing in the preliminary design of Coandă MAVs.
Originality/value
Physical and mathematical models were developed which can describe the physical phenomena of the flow field near the Coandă MAV surfaces influenced by Coandă jet sheets and for obtaining a relationship between relevant variables and parameters to the lift of practical interest.
Keywords
Acknowledgements
This work was supported in part by Universiti Putra Malaysia (UPM) Research University Grant Scheme (RUGS) No. 9378200, Universiti Putra Malaysia Graduate Research Grant GP-IPS/2014/9433914, and the Ministry of Higher Education grants ERGS 5527088 and FRGS 5524250.
Citation
Djojodihardjo, H., Ahmed, R.I., Abu Talib, A.R. and Mohd Rafie, A.S. (2017), "First principle analysis of Coandă Micro Air Vehicle aerodynamic forces for preliminary sizing", Aircraft Engineering and Aerospace Technology, Vol. 89 No. 2, pp. 231-245. https://doi.org/10.1108/AEAT-03-2015-0080
Publisher
:Emerald Publishing Limited
Copyright © 2017, Emerald Publishing Limited