logo-polimi
Loading...
Risorse bibliografiche
Risorsa bibliografica obbligatoria
Risorsa bibliografica facoltativa
Scheda Riassuntiva
Anno Accademico 2019/2020
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 054230 - FUNDAMENTALS OF HYPERSONIC FLOWS
Docente Frezzotti Aldo
Cfu 6.00 Tipo insegnamento Monodisciplinare

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - BV (469) AERONAUTICAL ENGINEERING - INGEGNERIA AERONAUTICA*AZZZZ054230 - FUNDAMENTALS OF HYPERSONIC FLOWS

Obiettivi dell'insegnamento

Hypersonic flows are characterized by high intrinsic kinetic energy which, during the interaction with bodies immersed within the gas stream, can be transferred to several physical processes, depending on the flow regime. Such processes include excitation of high vibrational levels, chemical reaction, ionization and emission of radiation. Each of the listed process is still subject of intensive research activities whose comprehensive treatment cannot be given by a single course. Hence, the course aims at presenting the most basic aspects of the phenomena which govern the physics of high temperature gases and assessing their importance in the different flow regimes encountered, for instance, during planetary entry manouvres of space vehicles.


Risultati di apprendimento attesi

It is expected that, at the end of the course, the student has acquired:

1) A clear understanding of the most basic processes involved into the physics of high temperature gases.

2) A clear understanding of the basic mathematical/numerical models that allow predicting (to some extent) the properties
    of hypersonic flows.


Argomenti trattati

Lectures

1 - Elements of molecular structure.
2 - Kinetic theory of dilute gases: dynamics of molecular collisions, the Boltzmann equation,
     the H-theorem, the partition function and thermodynamic equilibrium properties of a mixture of gases.
      Small and large Knudsen numbers: the aerodynamics of bodies in low earth orbit, Euler and Navier-Stokes
      approximation.
3 - Inviscid equations for a gas with roto-vibrational internal degrees of freedom. Local equilibrium approximation,
     vibrational relaxation rate equations. Shock wave structure, flows around blunt bodies.

4 - Inviscid equations for chemically reacting flows. Local equilibrium approximations, chemical rate equations.
     The ideal dissociating gas. Models of high temperature air chemistry.

5 - Flows with translational non-equilibrium and high altitude flight. Introduction to the Direct Simulation Monte Carlo
     (DSMC) method with simple applications to entry flows.

Exercise classes

1) OpenFoam applications to hypersonic flows around simply shaped bodies with different gas models

2) DSMC applications to hypersonic flows in the rarefaction regimes.


Prerequisiti

It is expected that students have a solid knowledge of the fundamental concepts about fluid dynamics and gas dynamics. In particular, the knowledge of inviscid, compressible flow equations for a simple polytropic gas and their applications to shock waves is assumed as starting point.


Modalità di valutazione

The examination is divided into two steps. The first one consists into a written test containing a number of questions concerning
the basic concepts exposed during the course. The second step consists of the oral discussion of a simple  numerical simulation
run by the student. The access to the second step requires that the minimum threshold of 18/30 is reached in the first one.


Bibliografia
Risorsa bibliografica facoltativaJohn D. Anderson, Hypersonic and High-Temperature Gas Dynamics, Editore: American Institute of Aeronautics and Astronautics, Anno edizione: 2006
Risorsa bibliografica facoltativaErnst Heinrich Hirschel, Basics of Aerothermodynamics, Editore: Springer, Anno edizione: 2014
Risorsa bibliografica facoltativaW.G. Vincenti, C.H. Kruger, Introduction to Phyisical Gas Dynamics, Editore: Krieger Publishing Company, Anno edizione: 1986
Risorsa bibliografica facoltativaJ. H. Ferziger, H. G. Kaper, Mathematical Theory of Transport Processes in Gases, Editore: North Holland Publishing Company, Anno edizione: 1972
Note:

Out of print. A .pdf version will be made available.

Risorsa bibliografica facoltativaTeacher notes

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
39:00
58:30
Esercitazione
21:00
31:30
Laboratorio Informatico
0:00
0:00
Laboratorio Sperimentale
0:00
0:00
Laboratorio Di Progetto
0:00
0:00
Totale 60:00 90:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese
schedaincarico v. 1.6.1 / 1.6.1
Area Servizi ICT
02/04/2020