2021 Tsinghua-Princeton-CI Summer School on Combustion
Lecturer: Professor Alison Tomlin, University of Leeds, UK
Course Content: Chemical kinetic processes underlie all combustion phenomena. Consequently, accurately predicting chemical changes is fundamentally important for predicting combustion within a range of devices including engines, boilers, furnaces and gas turbines. On the other hand, chemical oxidation processes, particularly for complex fuels such as biofuels, involve very large numbers of species and reactions, posing challenges for including detailed chemistry within models of practical devices. With this in mind, the course will take students on a journey from the fundamentals of reaction kinetics basics through to constructing chemical mechanisms for different fuel types, reducing them to facilitate their use in reactive flow models and finally to quantifying the impact of inherent uncertainties on their predictive quality. Topics will include: chemical mechanism structure; stoichiometry; rate equations for basic reactors; temperature and pressure dependence of rate coefficients; determination of rate constants via experimental and theoretical methods; basic thermodynamics; automatic generation of reaction mechanisms; ignition phenomena and low temperature chemistry; adiabatic flame temperature and high temperature chemistry; pollutant formation mechanisms; future fuels and challenges they pose for combustion systems; model uncertainties and sensitivity analysis; chemical model reduction methods.
Combustion Theory, Modeling, and Application
Lecturer: Professor Heinz Pitsch, RWTH Aachen University, Germany
Course Content: Fundamental knowledge in laminar and turbulent combustion, applications in CFD, machine learning and data analysis: laminar premixed and diffusion flame structure, flammability limits, laminar flame simulations using the FlameMaster code, introduction to turbulence, DNS and LES, turbulent combustion and modeling, CFD and numerical combustion with application to internal combustion engines and gas turbines. Focus topic: Hydrogen combustion.
Lecture Notes (not available)
Combustion Dynamics and Unsteady Combustion
Lecturer: Prof. Sébastien M. Candel, CentraleSupélec, University Paris-Saclay, France
Course Content: This course provides an introduction to the analysis of combustion dynamics. After a broad introduction to acoustics and to early combustion instability models, the following topics will be covered: perturbed flame dynamics, flame transfer functions, nonlinear flame dynamics, flame describing function methods, the validity of these methods in instability analysis, premixed swirling flames and swirling spray flames, azimuthal coupling in annular combustors, passive and active control of instabilities. Questions of ignition and flame blow out will also be examined. The various concepts will be illustrated with experimental data, computational flame dynamics and large eddy simulations and many practical examples.
Advanced Laser Diagnostics in Combustion Research
Lecturer: Professor Mark Linne, The University of Edinburgh, UK
Course Content: This course will introduce the basic topics underlying laser diagnostics; including development of commonly used expressions from the equation of radiative transfer, selected topics in physical optics, an introductory explanation of quantum mechanics and molecular structure, transitions, transition strengths and transition line shapes. A selection of diagnostics will be presented in the same context. Techniques to be discussed will include Rayleigh and Mie scattering, particle image velocimetry (PIV) and wavelet-based optical flow velocimetry (wOFV), ballistic imaging, structured laser illumination planar imaging (SLIPI), two-photon planar laser induced fluorescence in sprays, absorption-based techniques (e.g. frequency comb spectroscopy), laser induced fluorescence for combustion species, Raman scattering, and nonlinear optics including laser induced thermal acoustics and coherent anti-Stokes Raman scattering. A lecture on lasers and laser physics will also be provided.