Rapid Prediction of Hybrid Wing Body Aerodynamics

DiMaggio, Griffin A.; Hartfield, Roy J.; Ahuja, Vivek

doi:10.2514/6.2022-3298

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…The driving force in this regime is therefore the displacement of the potential flow boundary by the high thickness of the viscous boundary layer. This effect leads to an overprediction of the aerodynamic forces by the current model [15].…”

Section: Flightstream Surface Vorticity Solvermentioning

confidence: 98%

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Application of a Semi-Empirical Method to Model Subsonic Vortex Lift over Sharp Leading-Edge Delta Wings

Huynh

Pasquale

Prince

et al. 2023

AIAA SCITECH 2023 Forum

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A semi-empirical method is applied as a complement to the FlightStream solver, to more accurately model subsonic vortex lift over a sharp leading-edge delta wing. The method, based on the prediction of flow patterns and the application of the Polhamus method, is particularly well-adapted to a preliminary aerodynamic design phase. Within a few minutes, it can accurately predict the aerodynamic forces generated by the flow over a delta wing, which are strongly affected by the presence of a leading-edge vortex. This study presents a detailed analysis where computed results are compared against experimental data. Those were obtained from a test case of a 65° subsonic delta wing experiment (case 1), along with a sensitivity analysis against sweep angle and aspect ratio where multiple subsonic delta wings were tested (case 2). A good agreement is observed between computed data and experimental results, within pre-stall, before the vortex bursts. Analysed results demonstrate the validity of the method, for multiple wing configurations associated with different flow conditions.

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Section: Flightstream Surface Vorticity Solvermentioning

confidence: 98%

“…𝑀 𝑁 = 𝑀 cos 𝛬 𝐿𝐸 √1 + sin 2 𝛼 tan 2 𝛬 𝐿𝐸 (15) where 𝛬 𝐿𝐸 is the leading-edge sweep angle, M the Mach Number and 𝛼 the angle of attack.…”

Section: B Flow Classificationmentioning

confidence: 99%