Publication: Numerical investigation on Coanda flow over a logarithmic surface
Date
2015
Authors
Gan C.Y.
Sahari K.S.M.
Tan C.S.
Journal Title
Journal ISSN
Volume Title
Publisher
Korean Society of Mechanical Engineers
Abstract
The Coanda effect has been introduced into lift generation designs. In this paper, a logarithmic spiral surface is introduced as a curvature shape to evaluate the development of jet flow along the Coanda curvature. Moreover, 2D computational fluid dynamics numerical simulation is adopted to measure velocity profile, jet width growth, maximum velocity decay, and surface static pressure along the curvature surface. A parametric study on the effect of varying exit jet heights on the Coanda effect is also presented. Results show that jet width grows proportionally along the curved surface, and the proportional decay of maximum velocity and surface pressure is lower than the atmospheric pressure. A wider exit jet height produces lower static pressure on the unmanned aerial vehicle surface and a slower maximum velocity decay. Overall parametric analysis of varying exit jet heights shows that the effective range of d/R is 0.1 to 0.14. � 2015, The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg.
Description
Atmospheric pressure; Computational fluid dynamics; Fluid dynamics; Surface measurement; Unmanned aerial vehicles (UAV); Velocity; Coanda effects; Logarithmic spiral; Maximum velocity; Numerical investigations; Parametric -analysis; Surface pressures; Surface static pressure; Velocity profiles; Fighter aircraft