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Ruch cieczy w zbiorniku w ruchu obrotowym

Trębacki K., Królicka A.

Autobusy : technika, eksploatacja, systemy transportowe

2016

R. 17, nr 10

92--96

W artykule omówiony został ruch ładunku płynnego w zbiorniku podczas obrotu. Przeprowadzono analizę teoretyczną wg teorii liniowej i nieliniowej. Wyznaczono potencjał prędkości cieczy i na tej podstawie funkcję ciśnienia w dowolnym punkcie objętości cieczy w zbiorniku. Podano wykresy obciążeń ścianek zbiornika od cieczy wg obydwu teorii.

The article discussed a motion of liquid cargo in tank during rotation. The conducted are of theoretical analysis according linear and non-linear theory. Was designated the potential of velocity of the liquid and on the basis of pressure function at any point liquid of volume in tank. Are given of load charts walls of tank of liquid according to both theories.

2nd generation wobble watercraft

Urbánek M., Jánská D., Mašek M., Folgar Ribadas H., Nový Z.

Journal of Achievements in Materials and Manufacturing Engineering

2015

Vol. 73, nr 2

185--189

Purpose: The main objective of the present work was to develop a new type of human-powered watercraft for sports activities on still water bodies, such as reservoirs and lakes. Design/methodology/approach: The power for the watercraft is provided by the body of its operator who sets the propulsion mechanism in oscillating or rocking motion. The oscillating or rocking motion of the mechanism is transmitted to underwater propelling elements. A prototype has been built and tested. A computer model of this craft was constructed using Solidworks 2014 CAD tool and strength verification calculations were carried out in MSC.MARC software. Findings: The prototype consists of a float in the form of a surfboard and a moving mechanism which incorporates a welded high-strength aluminium alloy frame. Great effort was put into finding an appropriate shape of the propelling element. Practical implications: Multiple elements of various shapes and sizes have been tested. Their verification with the aid of CFD analysis in Xflow software was followed by physical testing. Originality/value: Once the suitable type, shape and size of the propelling element were identified, the elements were applied to the craft. Successful testing of these 2nd generation prototypes was completed this year.