Spectroscopic Methods and Visualization Applied to Combustion Diagnoses - Novel Combustion Concepts for Sustainable Energy Development - page 171

Spectroscopic Methods and Visualization
Applied to Combustion Diagnoses

Kuniyuki Kitagawa

Abstract Recently, it has well been realized that from the viewpoints of depletion
of fossil fuels and global warming effect along with increasing demand for elec-
tricity and thermal energy, the energy issue is currently among the most important
ones. The key strategies in this regard include the development of renewable energy
and increase in energy system ef

ciency.

Keywords Optical diagnostics Spectroscopic temperature pro le Soot

temperature pro le High-temperature air combustion Premixed and diffusion

fl ames

1 Introduction

Recently, it has well been realized that from the viewpoints of depletion of fossil
fuels and global warming effect along with increasing demand for electricity and
thermal energy, the energy issue is currently among the most important ones. The
key strategies in this regard include the development of renewable energy and
increase in energy system ef

ciency.
Combustion systems are nowadays one of the key technologies for energy
conversion from chemical potentials in fossil fuels and biomass as well to heat and/
or electric power. Two important issues for combustion systems to be environ-
mentally benign are how to increase the conversion ef

ciency and to decrease toxic
emission. A key issue to this is to unravel combustion. However, its phenomena are
extremely complicated with many chemical reactions as well as mass and heat
transfers. Numerical simulations are therefore sometimes inadequate, and experi-
mental results are necessary for their validations.
The key parameters involved in combustion phenomena include temperature,
mass (chemical molecules and particles) and heat fl flows, mass concentrations.