Investigation of shallow UNDEX in littoral ocean domain
Ahn, Sung (Dean) H.
Kwon, Young W.
Didoszak, Jarema M.
MetadataShow full item record
With recent delivery of littoral combat ships, the impact of operating in shallow or littoral ocean domain (LOD) during the duration of their life cycle is of interest, and a shock trial or hardening test and validation for this class is needed. For this study, the theories of underwater shock phenomena as applied within the boundaries of LOD, specific to the Eulerian fluid domain were conducted. The results of varying ocean depth show clear distinction in UNDEX characterization at depths shallower than 300ft. Varying charge size and depth showed that charge size of less than 300lbs of HBX-1 displayed a linear relationship while changing the charge depths to near water-air or water-bottom interface also resulted in amplified characteristics of UNDEX parameters. In addition, varying lateral boundary showed that as its distance is brought inside the radius of bulk cavitation, the UNDEX behavior also became increasingly chaotic due to similar effects seen in the shallower bottom depth. Lastly, adding blocked cells prior to a full scale coupled run showed that fluid behaves more erratically as these small rigid boundaries are situated within the radius of forming bulk cavitation.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
Showing items related by title, author, creator and subject.
Wang, Qichun; Stănică, Pantelimon (2019);In 1981, Schatz proved that the covering radius of the binary Reed- Muller code RM (2, 6) is 18. It was previously shown that the covering radius of RM(2,7) is between 40 and 44. In this paper, we prove that the covering ...
Rudko, David D. (Monterey, California. Naval Postgraduate School, 2003-03);The purpose of the Littoral Combat Ship is to provide the Navy with an affordable, small, multi-mission ship capable of independent, interdependent and integrated operations inside the littorals. The Littoral Combat Ship ...
Ghandehari, Mostafa (Monterey, California. Naval Postgraduate School, 1988-08); NPS-53-88-008The Blaschke-Lebesgue theorem states that of all plane sets of given constant width the Reuleaux triangle has least area. The area to be minimized is a functional involving the support function and the radius of curvature ...