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Nose Part of the Body of Revolution Having Minimum Aerodynamic Drag in the Range of Large Subsonic Velocities

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Abstract—

The problem of constructing axisymmetric nose parts having minimum aerodynamic drag in the range of large subsonic flight velocities under a given constraint on the aspect ratio is solved. The search for optimum shapes is based on the local linearization approaches, which were used in analyzing the results of simulations within the framework of Navier—Stokes equations and ensured the convergence with a limiting reduction in direct calculations of the numerical optimization process at large (more than 70) number of geometric parameters. The effect of additional restrictions imposed on the generator curvature on the drag is studied. The nose parts thus constructed and those having near-optimum characteristics are compared at subsonic and supersonic velocities; the latter forebodies are the Ryabouchinsky half-cavity and a truncated power-law body. The known feature of the bodies realizing zero or minimum wave drag at a given length, namely, the possibility of the formation of flat-faced nose as a region of boundary extremum, is confirmed.

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Funding

The study was carried out with the financial support of the Russian Foundation for Basic Research (project no. 19-01-00671).

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Authors and Affiliations

  1. Zhukovski Central Aerohydrodynamic Institute (TsAGI), 140180, Zhukovsky, Moscow oblast, Russia

    A. P. Mazurov & S. A. Takovitskii

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  1. A. P. Mazurov
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  2. S. A. Takovitskii
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Correspondence to S. A. Takovitskii.

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The authors declare that they have no conflicts of interest.

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Translated by M. Lebedev

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Mazurov, A.P., Takovitskii, S.A. Nose Part of the Body of Revolution Having Minimum Aerodynamic Drag in the Range of Large Subsonic Velocities. Fluid Dyn 57, 86–95 (2022). https://doi.org/10.1134/S0015462822010074

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  • DOI: https://doi.org/10.1134/S0015462822010074

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