Print Email Facebook Twitter Aerodynamic Design of a Flying V Aircraft in Transonic Conditions Title Aerodynamic Design of a Flying V Aircraft in Transonic Conditions Author Laar, Yuri (TU Delft Aerospace Engineering) Contributor Benad, J. (mentor) Vos, Roelof (mentor) Degree granting institution Delft University of Technology Programme Aerospace Engineering Date 2023-10-11 Abstract The Flying V is a long-range, flying-wing aircraft where payload and fuel both reside in a V-shaped, crescent wing with large winglets that double as vertical tail planes. The objective of this study is to maximize the lift-to-drag (𝐿/𝐷) ratio of the Flying V in cruise conditions, i.e. 𝐶𝐿 = 0.26, 𝑀 = 0.85 and to investigate its off-design performance in high-subsonic conditions. This is done by manually modifying the design parameters that describe the outer mold line of the Flying V and assessing the aerodynamic performance by means of computational fluiddynamics. A 15-million cell, third-order MUSCL, Reynolds-Averaged Navier Stokes solver with the Menter SST turbulence model is used to estimate the aerodynamic coefficients. A new, CATIA-based, parametrization of the Flying V is the starting point of the design. Three manual design phases improve the aerodynamic performance while satisfying all constraints. Designmodifications included an increase in camber and aft-loading of the wing around 40% of the semispan and improved airfoil sections on the outboard wing generating the required lift coefficient towards an elliptical lift distribution. The twist distribution at the wing-winglet junction is optimized to reduce wave drag. This has resulted in an improvement of 𝐿/𝐷 from 21.3 for the baseline to 24.2 for the final version while reducing the cruise angle of attack from 5.2 to 3.6 degrees. The drag divergence Mach number is estimated at 0.925. Subject Aircraft DesignAerodynamicsRANSFlying WingsAircraft PerformanceCFD To reference this document use: http://resolver.tudelft.nl/uuid:591093b2-5cdc-41c5-b564-3786f43d51db Part of collection Student theses Document type master thesis Rights © 2023 Yuri Laar Files PDF Thesis_Yuri_Laar_Final.pdf 13.17 MB Close viewer /islandora/object/uuid:591093b2-5cdc-41c5-b564-3786f43d51db/datastream/OBJ/view