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CODE 56624
ACADEMIC YEAR 2019/2020
CREDITS
SCIENTIFIC DISCIPLINARY SECTOR ING-IND/08
LANGUAGE Italian
TEACHING LOCATION
  • GENOVA
SEMESTER 2° Semester
MODULES Questo insegnamento è un modulo di:
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

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.