Numerical study of airfoil stall cells using a very wide computational domain

Simple item page
dc.contributor.authorManni, Luca
dc.contributor.authorNishino, Takafumi
dc.contributor.authorDelafin, Pierre-Luc
dc.date.accessioned2016-10-20T18:10:32Z
dc.date.available2016-10-20T18:10:32Z
dc.date.issued2016-10-05
dc.description.abstractThe formation of stall cells over a NACA 0012 airfoil at a Reynolds number of one million has been investigated numerically, using unsteady Reynolds-averaged Navier–Stokes (URANS) and delayed detached-eddy simulation (DDES) approaches. The simulations are performed with a very wide computational domain (10 chord length) to minimize the influence of spanwise periodic boundary conditions. For the URANS simulations, four different spanwise mesh resolutions are tested to determine the minimum resolution required to capture the formation of stall cells. Both URANS and DDES results show a sudden decrease in lift and increase in drag between 16° and 17° angle of attack, accompanied by a significant change of separated flow patterns. Stall cell structures are observed clearly in the URANS solutions between 17° and 19° with a spanwise spacing of about 1.4 to 1.8 chord length, which agrees well with a theoretical prediction based on the slope of the lift curve in this angle-of-attack range. The DDES results show much more complex flow patterns over the airfoil at these high angles of attack, although the spectral analysis of wall shear stress suggests the existence of flow structures having a similar spanwise length scale to the stall cells.en_UK
dc.identifier.citationLuca Manni, Takafumi Nishino, Pierre-Luc Delafin, Numerical study of airfoil stall cells using a very wide computational domain, Computers & Fluids, Volume 140, Issue November, 2016, pp. 260-269en_UK
dc.identifier.issn0045-7930
dc.identifier.urihttp://dx.doi.org/10.1016/j.compfluid.2016.09.023
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/10810
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 3.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/
dc.subjectFlow separationen_UK
dc.subject2D/3D transitionen_UK
dc.subjectHigh aspect ratio wingen_UK
dc.subjectUnsteady RANSen_UK
dc.subjectDelayed DESen_UK
dc.titleNumerical study of airfoil stall cells using a very wide computational domainen_UK
dc.typeArticleen_UK

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Numerical_study_of_airfoil_stall_cells-2016.pdf
Size:
7.48 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.79 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

Staff publications (SWEE)