CODE 56624 ACADEMIC YEAR 2019/2020 CREDITS 6 cfu anno 1 INGEGNERIA MECCANICA - PROGETTAZIONE E PRODUZIONE 9269 (LM-33) - GENOVA SCIENTIFIC DISCIPLINARY SECTOR ING-IND/08 LANGUAGE Italian TEACHING LOCATION GENOVA SEMESTER 2° Semester MODULES Questo insegnamento è un modulo di: HEAT TRANSFER AND FLUID MACHINERY TEACHING MATERIALS AULAWEB OVERVIEW The course is aimed at providing the basic information for: The choice of a fluid machine basing on the requested performance The knowledge of its behaviour, and related fluid dynamic and structural issues AIMS AND CONTENT LEARNING OUTCOMES The course aims at providing the basic information about the functioning of compressors, fans, and pumps. The effects of the kind of fluid, and of structural and economic issues on the machine architecture are also considered. On such a basis, choice and installation criteria are derived, and information are provided about the machine operation, also considering the system in which the machine is installed. Preliminarily, physical properties of technical fluids are recalled, together with thermodynamic and fluid dynamic equations relevant to fluid machinery. TEACHING METHODS Theoretical and applied lectures SYLLABUS/CONTENT The main engineering problems: the design problem, the direct problem, and the choice problem. The basic equations for the study of open systems and turbomachines (continuity, energy, Euler) and the definition of the important quantities for the study of fluid machinery (head, efficiency, specific work). Statistics and similarity; use of statistics for the choice of a machine: the Cordier plot. The effect of heating and dissipation on the efficiency of the compression of gases. Dynamic type machines: compressors, blowers, fans, and pumps, of axial and radial type: working principle, typical applications, limitations of operating conditions. (stall, cavitation, surge). Displacement type machines: reciprocating and rotary screw/vane compressors and pumps: working principle, typical applications, limitations on the operating conditions (volumetric efficiency, maximum compression ratio, cavitation). Similarity and characteristics curves of turbomachines and of typical fluid dynamic loadings (hydraulic circuits and choked nozzles). Determination of the operating point: matching of the characteristic curves. The unsteady operation of turbomachines and the ways of avoiding it. Design exercises: filling of a tank and fluid distribution circuit. RECOMMENDED READING/BIBLIOGRAPHY Lecture notes by the teacher, available at https://dime.aulaweb.unige.it/course/search.php?search=modulo+di+macchine R.I. Lewis, Turbomachinery performance analysis, John Wiley and Sons L. A. Catalano, M. Napolitano, Elementi di Macchine operatrici a fluido, Pitagora Editrice TEACHERS AND EXAM BOARD ANDREA CATTANEI Ricevimento: Please contact the teacher by e-mail at the address <Andrea.Cattanei@unige.it> Exam Board VINCENZO BIANCO (President) ANDREA CATTANEI (President) EDWARD CANEPA CARLO CRAVERO FRANCESCO DEVIA LUCA ANTONIO TAGLIAFICO LESSONS LESSONS START According to the official classes schedule, available at http://www.ingegneria.unige.it/index.php/orario-e-calendario-delle-lezioni Class schedule FLUID MACHINERY EXAMS EXAM DESCRIPTION Oral examination upon request at the end of classes, normally each Tuesday. Please contact the teacher by email <Andrea.Cattanei@unige.it> at least one week in advance. ASSESSMENT METHODS Discussion of the subjects treated in course starting from two questions. The examination aims at evaluating physical understanding and engineering usefulness. Exam schedule Data appello Orario Luogo Degree type Note 28/02/2020 09:30 GENOVA Esame su appuntamento 18/09/2020 09:30 GENOVA Esame su appuntamento FURTHER INFORMATION Pre-requisites : Basic knowledge of Fluid mechanics, Thermodynamics and Fluid machinery.
