Pedro Paulo BATISTA DE ARAUJO, Roberto YUJITANAKA, Fabio Henrique EUGENIORIBEIRO, Andre Carlos FRAILEJUNIOR, Angelo PASSARO, Lucas GALEMBECK, Giannino Ponchio CAMILLO, Dermeval CARINHANHA JR, Johan STEELANT

DOI Number: 10.60853/hkke-vn35

Conference number: HiSST-2024-00161

To improve the preliminary design of high-speed vehicles, the usage of analytical tools could avoid the necessity of CFD simulations in the early stages, decreasing the time necessary for design iterations, as long as the results have a reasonable agreement with data from CFD or experiments. In this work, results obtained from analytical calculations based on the local surface inclination method and tangent-wedge method, allied to the Eckert formulation to estimate the friction in a high-velocity turbulent boundary layer, are compared with CFD data related to the HEXAFLY-INT geometry. The analytical lift coefficient, 𝑐௅ , fits well with CFD data. The analytical drag coefficient, 𝑐஽, is underestimated if only the pressure influence on the drag is considered, disregarding the viscous effects. Considering the wall shear stress by means of estimating the friction coefficient in a high-velocity turbulent boundary layer improves the estimative of the analytical drag coefficient and, consequently, the L/D ratio. The L/D ratio behaves within the maximum and minimum limits presented by ESA.

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In Categories: 1.Events, High-Speed Missions and Vehicles, HiSST 2024
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