Search    Print

Turbomacchine
Turbomachinery
Leonardo Pelagalli

Seat Ingegneria
A.A. 2015/2016
Credits 6
Hours 48
Period II
Language ENG

Prerequisites
Mathematical analysis, Physics, Applied mechanics, Machines

Learning outcomes
The course aims to provide the student with advanced knowledge on the thermo-fluidynamic phenomena and the design criteria of turbomachinery such as turbines and compressors.

Program
Fludynamic equations for the flow of a non-reacting, compressible and uncompressible, steady and unsteady, viscous and inviscid perfect fluid. Reference systems. Normal shocks. Quasi-one dimensional flow. Nozzles and diffusors. Viscous and adiabatic one dimensional flow (Fanno flow). Heat exchanging inviscid flow (Rayleigh flow). Axial compressors and turbines. The fluidynamic analysis of the stage. The reaction grade. Blade profiles and cascades. Fluidynamic losses and deviation angles. Experimental and numerical methods for the performance previsions. Efficiency. The performance curves. Off design performance for a single and twin-shaft gas turbine and a turbojet.

Development of the examination
LEARNING EVALUATION METHODS
The assessment of the level of learning and understanding consists of two parts: 1 - written test containing four questions related to the topics covered in the lectures 2 - oral clarification and/or deepening of the themes of the written test, if necessary, by adding an additional problem of theoretical and/or application nature.

LEARNING EVALUATION CRITERIA
The student has to demonstrate to have understood and acquired the physical principles and theoretical considerations on the basis of turbomachinery running with the addition of a valid competence regarding the construction configurations and nominal operating conditions and in the regulation phase. The responses also include the quantitative knowledge of the topic.

LEARNING MEASUREMENT CRITERIA
Attribution of the final mark out of thirty. The final evaluation results from the weighted average of the pre-trial written examination (25%) and oral (75%). To pass the exam both tests should be sufficient.

FINAL MARK ALLOCATION CRITERIA
In order that the final outcome of the evaluation is positive, the student will have to prove that he has no gaps on basic skills covered in the course. The highest rating is achieved by demonstrating in-depth knowledge of the course content. Praise is given to students who, having done the pre-exam and oral fairly and with good level of detail, have also shown a particular brilliance in exposure and/or have demonstrated particular mastery of the material knowing also the use of the acquired skills to analyze topics not explicitly covered or treating the topics in a way alternative to the proposed one.

Recommended reading
Cohen, H., Rogers, G.F.C., Gas Turbine Theory, Longman Scientific Technical. Sandrolini, S., Naldi, G., Le turbomacchine motrici e operatrici, Pitagora Editrice-Bologna. Sandrolini, S., Naldi, G., Macchine - Gli impianti motori termici e i loro componenti

Courses

• Ingegneria Meccanica (Corso di Laurea Magistrale (DM 270/04))