The effect of turbulence intensity on performance of a NACA4421 airfoil section

K. E. Swalwell, J. Sheridan, W. H. Melbourne

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

6 Citations (Scopus)

Abstract

There has been little research on the effect of turbulence on the performance of airfoil sections near stall, and some of the results have been contradictory. Wind turbines operate in the turbulent natural wind but their rotation will limit the turbulence levels the blades experience. This study looked at the effect of small intensities of turbulence on the performance of a thick, cambered airfoil section, such as those used at the base of a wind turbine blade. Two rows of pressure taps were placed a chord length either side of the tunnel centre line. They showed different results during stall due to different positions relative to the stall cells. All levels of turbulence investigated affected the stall characteristics of the airfoil. The higher intensities of 3% and 5% significantly altered the stall characteristics.

Original languageEnglish
Title of host publicationCollection of ASME Wind Energy Symposium Technical Papers AIAA Aerospace Sciences Meeting and Exhibit
Pages281-290
Number of pages10
Publication statusPublished - 29 Jul 2004
EventCollection of the 2004 ASME Wind Energy Symposium Technical Papers at the 42nd AIAA Aerospace Sciences Meeting and Exhibit - Reno, United States of America
Duration: 5 Jan 20048 Jan 2004

Conference

ConferenceCollection of the 2004 ASME Wind Energy Symposium Technical Papers at the 42nd AIAA Aerospace Sciences Meeting and Exhibit
CountryUnited States of America
CityReno
Period5/01/048/01/04

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