Helicopters are one of the most important tactical elements in maritime operations. The necessity to improve the conditions in which the landing and takeoff operations are carried out leads to the study of the flow that separates from the ship's superstructure over the flight deck. To investigate this flow a series of wind tunnel experiments have been performed by testing a sub-scale model of a frigate. Measurements of the flow velocity have been taken by means of laser Doppler anemometry in five points that simulate the last path of the landing trajectory. The data obtained in these experiments is analyzed in the frequency domain where the corresponding spectra are calculated. Onboard measurements from an actual full-scale frigate are analyzed and compared with the wind tunnel results. Conclusions obtained consist of a series of illustrative values of turbulent energy frequency ranges, which are valuable for any study in this field. The comparison shows a similarity between both experiments, reasserting the role of the wind tunnel measurements in these kind of studies.
Abstract-An experience developed by the authors in the design of educational tools, funded on multimedia support for using in teaching, will be presented. These tools have been used on the subject of Helicopters, http://ocw.upm.es/ingenieriaaeroespacial/helicopteros at the Universidad Politécnica de Madrid (E.U.I.T. Aeronáutica). Throughout more than ten years, these didactical and educational elements have been defined and developed. It has the singularity that most of them have been designed for undergraduate students, as a part of their end of degree projectwork. This peculiarity has led to a wide range of proposals and solutions, as well as an appropriate approach depending on the level of knowledge. The evolution of tools for developing these materials will be presented, discussing advantages and disadvantages. Finally, we will advance the new materials which are being prepared at present.
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