Thermodynamics and thermics - 5EUS5THE

Goal(s)

The module is about energy exchanges and transformations dealing with moving fluid. The question is approached by a global problematic where the stress is put on thermodynamics and transformation process (combustion turbomachines, combustion rotating machines and steam engine, gasification processes) and by a local approach where the thermal exchanges are considered. The objective is to precise the basic concepts that allow a calculation and a sizing of the energy system (aerospace propulsion, energy production) but also identifying the limits of their possible optimization. Lectures provided by industrialists complete the basic teachings (thermal exchangers).

Content(s)

Convection :
Fundamentals: Basic equations of the dynamics of compressible and incompressible fluids, Navier-Stokes equations; first and second law of thermodynamics, transport equations of energy, enthalpy and entropy.

Laminar Boundary Layer with transfer: boundary layer approximations, scale analysis, asymptotic behavior at small and large Prandtl numbers, comprehensive solutions and self-similar, effect of adverse pressure gradient, Falkner-Skan flow.

Transfers in internal laminar flows: Length of hydrodynamic developement, fully developed flows, heat transfer in a channel flow fully developed.

Laminar Natural Convection: Equation of the boundary layer under the effect of buoyancy, Boussinesq appproximation, integral and self-similar solutions, the effect of stratification, flow in a vertical channel, natural convection combined with forced convection, condensation.

Turbulence: parietal turbulence, turbulent boundary layer, velocity distribution, mixing length and eddy viscosity models, heat transfer in a turbulent boundary layer.

Free shear flows: bidimensional and round Jets, plumes, thermal wakes

Concepts of mass transfer: Basic equations, laminar and turbulent forced convection, effects of chemical reaction.

Heat exchangers

Thermodynamique des machines
The course is mainly focused on the thermodynamics of heat-engines. The first part concerns idealized reversible and irreversible transformations and cycles. A special attention is adressed to the nature of the intrinsec irreversibilites of ideal gas and vapour cycles. Next, for each family of heat engine (gas-turbines, turbojets, internal combustion engines, steam-turbines) a brief overview is developped about the consequences of technological constraints on the effective limits of the real thermodynamic cycles. An energetic and exergetic analysis is then developed to identify performance criteria (first law and seceond law efficiencies, specific energy…) as well as possible improvement of the basic cycle.
1) Elements of thermodynamics : first & second law, thermodynamic state functions, reversible & irreversible processes.
2) Gas-turbines
3) Turbojet
4) Internal combustion engine
5) Steam-turbines
6) Frigorific engine

Combustion
The course focuses on an introduction to combustion and to the study of flames. It includes a first portion of generalities followed by two groups of lectures presented by a speaker representing the industrial sector producing metals.
Introduction, basic concepts and definitions.
Fundamentals of flames
Combustion in alternative combustion engines
Combustion in turbo-machinery
Combustion in aluminum smelting furnaces

Boiling
Extensive knowledge on the thermal convection, nucleate boiling, boiling and boiling crisis in films are made ??specifically for students in the NEI sector, in order to give them the tools to the design of boilers in existing power plants and future nuclear or not. This course aims to provide the latest knowledge about global and local approach of boiling

Modélisation et analyse d’écoulements 1
Modélisation et analyse d’écoulements 2,
Heat and Mass transfers

Test

The exam is given in english only 

1 DS + 1 CC (dont notes BE-TP+oral article)

Additional Information

This course is given in english only