An Investigation of Goertler Vortices on Slotted, Natural-Laminar-Flow Airfoils

Christopher J. Axten, Mark D. Maughmer

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Slotted, natural-laminar-flow airfoils can produce high lift coefficients with low sectional drag. This is done by using favorable pressure gradients to maintain laminar flow on the fore element and using the aft element for the pressure recovery. However, the configuration creates a concave region at the rear of the fore element that is susceptible to Goertler instabilities. This work seeks to investigate and characterize the growth of Goertler instabilities on slotted, natural-laminar-flow airfoils. Three airfoils are considered: the S414.LSLTT, S103, and S207. Goertler transition is predicted to be unlikely on the S414.LSLTT, but likely on the S103 and S207. Reynolds number is also seen to have a significant influence on estimates of the S103 amplification ratios. The effects of Goertler transition on the S207 are also briefly discussed, including a notable drag increase.

Original languageEnglish (US)
Title of host publicationAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624106101
DOIs
StatePublished - 2021
EventAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021 - Virtual, Online
Duration: Aug 2 2021Aug 6 2021

Publication series

NameAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021

Conference

ConferenceAIAA Aviation and Aeronautics Forum and Exposition, AIAA AVIATION Forum 2021
CityVirtual, Online
Period8/2/218/6/21

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Energy Engineering and Power Technology
  • Nuclear Energy and Engineering

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