Liliana Rusu | Universitatea Dunarea de Jos Galati (original) (raw)

Papers by Liliana Rusu

Journal of Naval Architecture and Marine Engineering, 2014

This work presents a methodology for the evaluation of the vessels operability in the basin of th... more This work presents a methodology for the evaluation of the vessels operability in the basin of the Black Sea. The approach proposed is based on the results provided by a wave prediction system that was implemented and validated in the Black Sea. This offers a meaningful framework in the assessment of the seakeeping performance for ships operating in different conditions. The aim of the work is to improve the seakeeping performances for various types of ships that sail in the Romanian coastal zones. Two containerships are considered, of 1300TEU and 800TEU respectively, which have however the same displacement. For predicting the ship motions induced by the various wave conditions encountered in the operational area, it is necessary to know the transfer functions for different ship speeds and heading angles. These are computed with a numerical code based on the strip theory. The predicted motions are then compared with the limit values of the relevant seakeeping criteria, considered a...

Journal of Operational Oceanography, 2016

Renewable and Sustainable Energy Reviews, 2016

Ocean Eng, 2011

The theoretical background of the wave–current interactions, including the transformation of the ... more The theoretical background of the wave–current interactions, including the transformation of the wave spectrum and breaking waves due to currents, are first presented in this work. In the next part of the work, experimental data resulted from studies performed in an offshore wave basin of the Danish Hydraulic Institute concerning the wave–current interactions were presented in parallel with some wave model simulations performed in similar conditions. SWAN, which is presently the state-of-the-art spectral model for the wave transformations, was adopted for performing numerical simulations. In general, a good agreement was encountered between the experimental data and the simulation results.

Proceedings of the Institute of Marine Engineering Science and Technology Journal of Operational Oceanography, Feb 1, 2014

ABSTRACT www.iweee.ugal.ro/documente/Program\_final.pdf

14th SGEM GeoConference on WATER RESOURCES. FOREST, MARINE AND OCEAN ECOSYSTEMS, 2014

O objectivo do presente trabalho é de apresentar o sistema de previsão da agitação marítima que s... more O objectivo do presente trabalho é de apresentar o sistema de previsão da agitação marítima que se encontra operacional no Centro de Engenharia e Tecnologia Naval (CENTEC) e de avaliar o desempenho desse sistema na área de alta resolução que cobre a entrada no porto de Leixões.

The main objective of the present work is to develop the wave forecasting system that is operatio... more The main objective of the present work is to develop the wave forecasting system that is operational in the Centre for Marine Technology and Engineering, Lisbon, Portugal. This consists in including a new area that covers the coastal environment close to the port of Lisbon, namely the entrance to the Tagus estuary. The system is based on the wave models WAM (WAve prediction Model) and SWAN (Simulating WAves Nearshore), driven by the wind fields provided by the atmospheric models GFS (Global Forecast System) from NCEP (US National Centre for Environmental Prediction) and MM5 (Mesoscale Meteorological Model), respectively. The forecast products are updated daily for 4 days ahead. Graphical outputs of the wave parameters (fields and temporal series) are made available in the restricted domain. The performance of the wave forecasting system at the entrance of the Tagus estuary was also evaluated by comparing the predictions of the wave parameters with 'in situ' measurements collected by a wave-rider type buoy located at the entrance of the Tagus estuary. The emphasis was put on the high energetic conditions, which are of major interest in relationship with the coastal navigation.

ABSTRACT The following study makes an evaluation of different technologies for the wave energy in... more ABSTRACT The following study makes an evaluation of different technologies for the wave energy in the Canary Islands. Using WANA data covering an interval of 17 years (1996–2012) a comprehensive picture of the wave climate in the areas neighbouring the Canary Islands has been achieved. This includes both average and extreme wave conditions but also the identification of some hot spots. In the present work, the following WECs were considered to operate in the nearshore of the Canary Islands: AQUA BUOY, ARCHIMEDES WAVE SWING, ANGLEE, OE BUOY, PELAMIS and WAVE BOB. They are all designed for deep water conditions. Evaluations of the electric energy expected from each device along the selected sites were also carried out. A wave energy transformation index was computed in each location for each WEC device. The present work provides valuable information related to the effectiveness of various technologies for the wave energy extraction that would operate in the area of the Canary Islands.

OCEANS 2015 - Genova, 2015

The objective of the present work is to evaluate the wave conditions in the Azores Archipelago us... more The objective of the present work is to evaluate the wave conditions in the Azores Archipelago using numerical models. Taking into account the geographical position of the nine islands that form the Archipelago of Azores, the wave conditions are usually affected by various wave systems propagating across the North Atlantic Ocean. As a general feature, the archipelago is subjected to both the direct approach of the swell coming from distant storms as well as sea waves generated by local winds that create a local wave system and modify the incoming swell fields.A wave prediction system based on the two state of-the-art spectral phase averaging wave models,WAM applied at ocean scale and SWAN applied at regional and local scales was implemented in the Archipelago of Azores. Hindcast simulations were carried out for high energetic situations in the North Atlantic Ocean. The validation of the results was made with altimeter data that provide good coverage for the wave conditions.

A study of the wave propagation and of the consequences of the wave current interactions in the T... more A study of the wave propagation and of the consequences of the wave current interactions in the Tagus estuary is performed in the present work. Thus a couple of low tide and high tide subsequent situations, corresponding to an extreme energetic case, were considered. A Cartesian high-resolution SWAN grid was coupled to the wave prediction system developed in spherical coordinates. Using the ocean forcing this system provides the corresponding coastal transformation of the wave field. By introducing the Cartesian simulations, as a final extent of the system, some local processes as wave induced setup and diffraction can be also studied, and their relevance for this particular area is discussed. A balance between the accuracy of the results and the computational effectiveness was made by assessing the opportunity of using non stationary versus stationary simulations. However, the most important factors affecting the incoming waves are local currents and wind and their influences were evaluated and discussed.