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Increasing the operational reliability of a ship by using a composite impeller in the event of hydrophore pump failure

Jabłońska Monika, Jurczak Wojciech, Ozimina Dariusz, Adamiak Marcin

Eksploatacja i Niezawodność

2023

Vol. 25, no. 1

art. no. 18

The time-consuming technological process of manufacturing impellers and the high production costs are the reason for the search for alternative materials and manufacturing methods. In this paper, based on a literature analysis, the performance of a pump with an impeller that was manufactured by an incremental method from polyethylene terephthalate with an admixture of glycol and carbon fibre (PETG CF) was selected and studied. Operation tests were conducted on the ship’s rotodynamic pump test bench. The composite impeller pump was shown to have an efficiency at the selected printing parameters of 26,23%, comparable to a tin bronze impeller, which has an efficiency of 27,7%. The maximum pump useful power with the impellers tested was 337 W at a flow rate of 4.42 m3/h. The results confirm that, with a filament layer height of 0.12 mm and 100% fill in the four print contours, the pump characteristics obtained are consistent with those of the reference impeller. This fact ensures continuous operation of the ship’s pump for 48 hours which makes the chosen manufacturing method a reliable emergency method of impeller repair in offshore operations.

Technical aspect concerning vessels halt safety upon terrorist hazard

Kiciński Radosław, Jurczak Wojciech, Jabłońska Monika

Journal of KONBiN

2019

Vol. 49, iss. 2

161--182

The article presented and analysed the reliability of water barriers as one of the methods of securing naval technical facilities against the terrorist attacks (motorboats with explosive materials) from the sea. Water tests of FOXX barriers were described as a means of protection against such a threat. The reliability of the barrier was modelled and simulated with the use of Finite Element Method (FEM).

W artykule przedstawiono i przeanalizowano wytrzymałość barier pływających jako jednej z metod zabezpieczenia morskich obiektów technicznych przed działaniem terrorystycznym (motorówki z ładunkiem wybuchowym) od strony morza. Opisano testy pływającej bariery FOXX jako środka ochrony przed takim zagrożeniem. Zamodelowano i przeprowadzono symulację wytrzymałości bariery wykorzystując metodę elementów skończonych.