Experimental Determination of the Drag Coefficient of Conical Penetrators and a Penetrator with a Flat Front End during Supersonic Motion in Sandy Soil
| Autor: | S. I. Gerasimov, Vladimir I. Erofeev, A. G. Ioilev, Yu. F. Travov, S. A. Kapinos, A. P. Kalmykov, N. V. Lapichev, V. V. Pisetskii |
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| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
Drag coefficient Materials science Physics and Astronomy (miscellaneous) Motion (geometry) Mechanics Conical surface Physics::Classical Physics 01 natural sciences Physics::Geophysics 010305 fluids & plasmas Front and back ends 0103 physical sciences Supersonic speed Water content |
| Zdroj: | Technical Physics. 66:528-534 |
| ISSN: | 1090-6525 1063-7842 |
| Popis: | In this paper, we experimentally determine the drag coefficient when conical and cylindrical impactors penetrate into sandy soil. In the experiments, the half-opening angle of the conical tip of the penetrator (indenter) varied from 10° to 90°. The velocity of indenter movement varied in the range of 0.2–2.0 km/s. The average values of the drag coefficient are obtained for conical bodies during quasi-stationary supersonic motion in sandy soil with an average moisture content of 7–12% and for indenters with a flat front end in sandy soil with a moisture content of 0–16%. A significant dependence of the drag coefficient of thin cones (β < 25°) on the movement velocity and the absence of such a dependence (taking into account the experimental error) for obtuse cones and an indenter with a flat end were shown. |
| Databáze: | OpenAIRE |
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