Improved delayed detached eddy simulation of super-lift flow of co-flow jet airfoil

Yunchao Yang, Michael Fernandez, GeCheng Zha

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

Abstract

This paper present the improved delayed detached eddy simulation (IDDES) of Co-Flow Jet (CFJ) flow control airfoil, with super lift coefficient that exceeds theoretical lift coefficient limit[1]. The spatially filtered Navier-Stokes equations are solved using a fifth-order WENO reconstruction scheme for the inviscid fluxes and a fourth order central differencing scheme for the viscous fluxes. The IDDES is developed based on the Spalart-Allmaras (S-A) turbulence model and it incorporates the wall modeled large eddy simulation (WMLES) capacity. The simulated wing span is 0.1 chord with periodic boundary condition applied in the spanwise direction. The IDDES simulation of the CFJ wing is carried out at the AoA of 62 with three different jet momentum coefficients Cµ of 0.25, 0.35 and 0.5. The super-lift coefficient of 9.1 is achieved at AoA = 62 and Cµ = 0.5. The baseline NACA6421 wing is also simulated at AoA = 18 and the results show excellent agreement with the experiment. The comparison of the flow field of CFJ-NACA6421 and baseline NACA6421 airfoil shows that the CFJ can remove the flow separation at a high angle of attack. The high momentum jet provides adequate jet momentum to active the boundary layer and maintains the flow attached.The qualitative counter-rotating vortex structures at very high AoA and severe adverse pressure gradient is similar to those observed in 2D RANS simulation.

Original languageEnglish (US)
Title of host publicationAIAA Aerospace Sciences Meeting
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Edition210059
ISBN (Print)9781624105241
DOIs
StatePublished - Jan 1 2018
EventAIAA Aerospace Sciences Meeting, 2018 - Kissimmee, United States
Duration: Jan 8 2018Jan 12 2018

Other

OtherAIAA Aerospace Sciences Meeting, 2018
CountryUnited States
CityKissimmee
Period1/8/181/12/18

ASJC Scopus subject areas

  • Aerospace Engineering

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    Yang, Y., Fernandez, M., & Zha, G. (2018). Improved delayed detached eddy simulation of super-lift flow of co-flow jet airfoil. In AIAA Aerospace Sciences Meeting (210059 ed.). American Institute of Aeronautics and Astronautics Inc, AIAA. https://doi.org/10.2514/6.2018-0314