Evaluation of a vortex generator model in adverse pressure gradient boundary layers
2011 (English)In: AIAA Journal, ISSN 0001-1452, E-ISSN 1533-385X, Vol. 49, no 5, 982-993 p.Article in journal (Refereed) Published
The use of a two-dimensional statistical passive vortex generator model, applied to an adverse pressure gradient boundary-layer flow, is evaluated qualitatively against experimental and fully resolved vortex generator computations. The modeling approach taken here has the advantage of substantially reducing the complexity of including such flow separation control devices in a computational mesh, thus giving the opportunity to carry out faster parametric studies. Additional stresses, originating from the vortex generator model approach, are added as additional turbulent stresses to the mean governing equations instead of resolving vortex structures in the computational domain. The vortex generator model has been applied to allow direct comparison with prior experiments carried out at the Royal Institute of Technology Stockholm. Variations of the vortex generator streamwise position and tests of different vortex generator setups, such as co- and counter-rotational settings, are presented. Distributions of wall-pressure and skin-friction coefficients are used to evaluate the vortex generator model against fully resolved vortex generator data. It is shown that the vortex generator model successfully predicts attached and separated flow states. Moreover, the results illustrate the vortex generator model's capability to predict flow control sensitivity with respect to the streamwise position.
Place, publisher, year, edition, pages
2011. Vol. 49, no 5, 982-993 p.
LONGITUDINAL VORTICES, STREAMWISE VORTICES, SEPARATION, FLOW
IdentifiersURN: urn:nbn:se:kth:diva-25896DOI: 10.2514/1.J050680ISI: 000291072000010ScopusID: 2-s2.0-79955448523OAI: oai:DiVA.org:kth-25896DiVA: diva2:360572
FunderSwedish e‐Science Research Center
QC 20101103 Uppdaterad från submitted till published (20110613).2010-11-032010-11-032012-05-24Bibliographically approved