000013974 001__ 13974
000013974 005__ 20161115094007.0
000013974 04107 $$aeng
000013974 046__ $$k2016-08-21
000013974 100__ $$aDoyle, Rob
000013974 24500 $$aSimulation of an unappended axisymmetric submarine hull during unsteady pitching

000013974 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000013974 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000013974 506__ $$arestricted
000013974 520__ $$2eng$$aUnsteady CFD simulations of the unappended DARPA SUBOFF 5470 undergoing a pitch maneuver were conducted using Ansys CFX to support the development of hydrodynamic force models for simulating the transient dynamics of underwater vehicles. The simulations used a sliding mesh formulation and the BSL Reynolds stress turbulence model. Four simulations were conducted with varying pitch rates; the results from two of these were compared to experimental wind tunnel tests. The simulated flow was qualitatively correct, however comparisons show that the simulations under-predict the normal force and over-predict the pitching moment. This error grows in proportion to the angle of incidence. The body-normal vorticity moment distribution along the body and wake was calculated, and is seen to transition between from a steady translation distribution to a steady rotation distribution over the maneuver. This transition appears to be proportional to the local drift angle along the hull and the pitch rate.

000013974 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013974 653__ $$a

000013974 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000013974 720__ $$aDoyle, Rob
000013974 8560_ $$ffischerc@itam.cas.cz
000013974 8564_ $$s110529$$uhttps://invenio.itam.cas.cz/record/13974/files/PO.FM13-1.04.152.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 1372, code PO.FM13-1.04.152).
000013974 962__ $$r13812
000013974 980__ $$aPAPER