Large-eddy simulation of low-reynolds-number flow over thick and thin NACA airfoils

Ryoji Kojima, Taku Nonomura, Akira Oyama, Kozo Fujii

Research output: Contribution to journalArticle

58 Citations (Scopus)

Abstract

In this study, the flowfields around NACA0012 and NACA0002 airfoils at Reynolds number of 23,000 and the aerodynamic characteristics of these flowfields were analyzed using implicit large-eddy simulation and laminar-flow simulation. Around this Reynolds number, the flow over an airfoil separates, transits, and reattaches, resulting in the generation of a laminar separation bubble at the angle of attack in a certain degree range. Over an NACA0012 airfoil, the separation point moves toward its leading edge with an increasing angle of attack, and the separated flow may transit to create a short bubble. On the other hand, over an NACA0002 airfoil, the separation point is kept at its leading edge, and the separated flow may transit to create a long bubble. Moreover, nonlinearity appears in the lift curve of the NACA0012 airfoil, but not in that of NACA0002, despite the existence of a laminar separation bubble.

Original languageEnglish
Pages (from-to)187-196
Number of pages10
JournalJournal of Aircraft
Volume50
Issue number1
DOIs
Publication statusPublished - 2013
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering

Fingerprint Dive into the research topics of 'Large-eddy simulation of low-reynolds-number flow over thick and thin NACA airfoils'. Together they form a unique fingerprint.

  • Cite this