Design and Modeling of Mechanical Systems


Book Description

The 5th International Congress on Design and Modeling of Mechanical Systems (CMSM) was held in Djerba, Tunisia on March 25-27, 2013 and followed four previous successful editions, which brought together international experts in the fields of design and modeling of mechanical systems, thus contributing to the exchange of information and skills and leading to a considerable progress in research among the participating teams. The fifth edition of the congress (CMSM ́2013), organized by the Unit of Mechanics, Modeling and Manufacturing (U2MP) of the National School of Engineers of Sfax, Tunisia, the Mechanical Engineering Laboratory (MBL) of the National School of Engineers of Monastir, Tunisia and the Mechanics Laboratory of Sousse (LMS) of the National School of Engineers of Sousse, Tunisia, saw a significant increase of the international participation. This edition brought together nearly 300 attendees who exposed their work on the following topics: mechatronics and robotics, dynamics of mechanical systems, fluid structure interaction and vibroacoustics, modeling and analysis of materials and structures, design and manufacturing of mechanical systems. This book is the proceedings of CMSM ́2013 and contains a careful selection of high quality contributions, which were exposed during various sessions of the congress. The original articles presented here provide an overview of recent research advancements accomplished in the field mechanical engineering.




Propulsion and Energetics Panel Working Group 14 on Suitable Averaging Techniques in Non-uniform Internal Flows


Book Description

In 1979 the Propulsion and Energetics Panel of AGARD established a Working Group named WG 14 whose terms of reference were to study the averaging techniques used for non-uniform internal flows. This problem is relevant to gas turbine systems, in which the actual flows are usually heterogeneous and three-dimensional. Nevertheless, the test analysis and performance prediction methods are presently based upon simple one-dimensional models. Members of WG 14 first reviewed current practices as employed by research and development teams in various research establishments and industry. The Group also undertook a theoretical analysis of the relations which may be correctly applied to steady flows. Consequently it was possible to discuss and classify known averaging methods. The theoretical study concludes by proposing refinements to known methods and a new approach to averaging for use with engine components and propulsion system analysis. A large variety of possible averaging techniques were identified. Some were based on theoretical considerations, others were without justification except in their simplicity or common usage. All the averaging procedures were tested and compared by preparing a number of sample calculations in ducted flows, turbojet components and a complete propulsion system.