Laminar coflow diffusion flames doped with butanols

 

Abstract

coflow flamesModern combustion theory, together with readily available and relatively inexpensive high-performance computing technology, offers a unique opportunity to model combustion processes in detail and to improve both the performance and their environmental friendliness. Unfortunately, the computational study of combustion in practical combustion devices, such as industrial furnaces, stationary gas turbines, aero-combustors or internal combustion engines is a very challenging task from two perspectives. A first challenge arises from the fact that the flow in these systems is typically turbulent and inherently multidimensional. While progress has already been made in the direct numerical simulation of basic, laboratory-scale turbulent flames, accurate modeling of practical devices currently exceeds existing computational capabilities. A second challenge stems from the fact that many fossil fuels, such as aviation kerosene and diesel fuels, are mixtures of a large number of hydrocarbons that together must meet standardized specifications. The study of these mixtures typically requires the generation and use of chemical mechanisms consisting of hundreds of gaseous species and thousands of chemical reactions.

In the meantime, the computation of laminar flames with complex chemistry and detailed transport, in conjunction with careful experimental work, will continue to give substantial insight into the chemical and physical processes occurring in practical devices. The aim of this work is to better understand the coupling between kinetics and fluid dynamics in laminar coflow flames, especially with respect to fuel of relevant interest for the automotive and aerospace industry.

 

Details

Duration: 10-12 months

Experimental activities: no

Skills: transport phenomena, fundamentals of combustion, fundamentals of chemical kinetics

People involved: Alberto Cuoci, Alessio Frassoldati

Contacts: Alberto Cuoci