Combustion Fundamentals

The discussion of combustion fundamentals so far has focused on homogeneous systems. Heterogeneous combustion is the terminology often used to refer to the combustion of Hquids and soHds. From a technological viewpoint, combustion of Hquid hydrocarbons, mainly in sprays, and coal combustion are of greatest interest. 

Fundamental, laminar, and turbulent burning velocities describe three modes of flame propagation (see the Glossary for definitions). The fundamental burning velocity, S, is as its name implies, a fundamental property of a flammable mixture, and is a measure of how fast reactants are consumed and transformed into products of combustion. Fundamental burning velocity data for selected gases and vapors are listed in Appendix C of NFPA68 (1998). 

C. K. Law, Heat and mass transfer in combustion Fundamental concepts and analytical techniques. Prog. Energy Combust. Sci. 10 255-318,1984. 

Chapter 6.2, contributed by S.S. Shy, is devoted to the problem of flame quenching by turbulence, which is important from the point of view of combustion fundamentals as well as for practical reasons. Effecfs of turbulence straining, equivalence ratio, and heat loss on global quenching of premixed furbulenf flames are discussed. 

Cox, G. (ed.), Combustion Fundamentals of Fire, Academic Press, London, 1995. 

FIGURE 4.52 Stabilization methods for high-velocity streams (a) vee gutter, (b) rodoz sphere, (c) step or sudden expansion, and (d) opposed jet (after Strehlow, Combustion Fundamentals, McGraw-Hill, New York, 1985). 

R. A. Strehlow Combustion Fundamentals , McGraw-Hill, New York 1984. 

Leading programmes to support fuel developments, you ll use combustion fundamentals, combustion diagnostics, flow visualization and modelling toolsets, and deliver technical data based on fuel test programmes. You ll need at least five years mechanical or combustion chemistry experience and a relevant degree, while a PhD in combustion chemistry or similar would be useful. 

To make our combustion fundamentals considered above applicable to dust explosions we need only to add in the influence of particle size on reaction rate. Assuming the combustion reaction rate is now determined by the surface area of solid fuel particles (assumed spherical) exposed to the air, the heat release term (2) in Equation (15.4) becomes ... 

Candidates are required to complete training in safety, combustion fundamentals, and basic operation, and pass a written multiple-choice examination for provisional certification... 

This work was conducted in the Combustion Fundamentals Group of Paul Scherrer Institute, Villigen, Switzerland. Additional hnancial support was provided by the INIT Project Ultra-High-Energy-Density Converters for Portable Power of the Swiss Federal Institute of Technology Zurich. 

Many thanks to all former and current members of the Combustion Fundamentals Group in PSl, Salvatore Arcidiacono, Marta Bruska, Yohannes Ghermay, Gianmarco Pizza, Nikolaos Prasianakis, Adrian Schneider, for a fruitful and pleasant cooperation during my employment in Paul Scherrer Institute. 

---