The engine manufacturers adopt new measures in order to further improve the characteristics of a turbine engine. They pose new challenges to reduce a fuel consumption and an emission of pollution to the environment (including noise), but also keeping the highest level of reliability. Based on those considerations, current research in propulsion is conducted. Modern turbines are characterised by high inlet temperature. This has implications for engine efficiency, which is expressed with a change of mass, cross-section and fuel consumption. In this article, main trends in the development of turbine engines are presented. This analysis was carried out on the basis of Rolls-Royce engine data. The article presents literature review concerning the analytical methods of high-pressure turbines preliminary design. The aerodynamic design process is highly iterative, multidisciplinary and complex. Due to this, modern gas turbines need sophisticated tools in terms of aerodynamics, mechanical properties and materials. The article depicts simplified model of real turbine engine. As showed in the article, this model gives only a 10% error level in engine thrust value. The calculations may be used for preliminary engine analyses.
W artykule przedstawiono podstawowe problemy związane z opracowaniem koncepcji pojazdu PRWL ratownictwa wodnego przeznaczonego do prowadzenia akcji ratunkowej na akwenach pokrytych lodem. Opisano problem badaczy, przedmiot badań - pojazd PRWL, metodę badań oraz elementy wyników badań ukierunkowanych na opracowanie demonstratora technologii pojazdu PRWL. Podano też informacje na temat zastosowania pojazdu PRWL. Przedstawione w artykule informacje stanowią elementy prac autorów i wyników wstępnych badań przeprowadzonych na Politechnice Gdańskiej na Wydziale Oceanotechniki i Okrętownictwa Politechniki Gdańskiej w latach 2014-2015.
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In the paper the basic problems associated with development the concept of an inland water rescue vehicle PRWL which is devoted to perform the rescue activities on the inland waters covered by ice is presented. The research objective, PRWL vehicle, research method and some elements of the research directed towards development of the PRWL vehicle technology demonstrator has been described. Some information on a possible application of the PRWL vehicle have been given. The information presented in the paper are the results of work of the authors and results of research investigations conducted at the Gdańsk University of Technology, Faculty of Ocean Engineering and Ship Technology between 2014 and 2015.
W artykule przedstawiono główne charakterystyki rozwiązań projektowych typowych pojazdowców, m.in. rozplanowanie przestrzenne statku, typ konstrukcyjny. Przy wykorzystaniu analizy regresji oceniono wpływ istotności badanych parametrów. Zawarte w artykule zależności regresyjne jedno- i wieloparametrowe umożliwiają we wczesnym etapie projektowania oszacowanie wielkości statku-pojazdowca, jak i głównych jego charakterystyk.
EN
This article presents the main characteristics of typical design solutions of ro-ro trailer ships, including spatial layout of the ships and the type of design. With the use of regression analysis, the impact of the importance of the test parameters was assessed. The regression formulae, which are one and multi-veriable, can be used in preliminary design for the estimation of ro-ro trailer vessel dimensions and main characteristics.