Mixing-controlled combustion

Yu, K.H., and K.C. Schadow. 1994. Cavity-actuated supersonic mixing and combustion control. Combustion Flame 99 295-301. 

Ch.A. Lebailiff, FrP 1429285(1966) St CA 65, 12058(1966) [A compn, whose combustion velocity can be controlled is obtd by mixing a combustible (gelled hydrocarbons), an oxidizer (such as Amm nitrates, chlorates or perchlorates) and of an aq soln of a gum. Amines as stabilizers are added]... 

Why was Bunsen so interested in fire Because laboratory workers had long been plagued by sooty, hard-to-control flames. As oxygen was necessary for combustion and soot was the product of incomplete combustion, Bunsen concluded that the secret to a clean flame lay in mixing the combustible gas with air in just the right proportion. 

COMBUSTION AND MIXING CONTROL STUDIES FOR ADVANCED PROPULSION... 

Ken Yu s group at the University of Maryland extended the previously reported work [3] to include four sets of experimental and analytical studies to identify key physical mechanisms for controlling mixing and combustion processes in ramjet and scramjet combustors (Chapter 16). In a supersonic mixing-enhancement experiment, the practicality of utilizing passive acoustic excitation as a means to enhance mixing in scramjets is assessed. 

Thermal Recycling - A plastics recycling method in which mixed plastic waste undergoes controlled combustion, producing heat that can be used as a substitute for oil, gas, and coal, or for the generation of energy at power plants. 

Another new application of coal briquetting that is already being used, is the den-sification and shaping of solid reductant for the direct reduction of iron ores. Such briquettes are mixed with iron ore and fed into the reactor where controlled combustion provides heat and reducing gas for the production of direct reduced iron (DRI). 

To generate enough OH radicals to oxidize the available CO it is essential that sufficient O2 is available to combust local CO pockets of evolved volatile matters near stoichiometry. It was shown that reactions (Equations 31.56 through 31.60) can be considered to be micro/macro mixing controlled. The flow patterns in the near burner zone are controlled by the burner design. Detailed evaluation, carried out on the IFRF experimental rig, of the effect of momentum on the flame heat transfer has indicated that a minimum 7 N/MW,h axial momentum, not allowing for coal and transport air momentum, is required. 

Precision Combustion Catalytica, TKK KK and Ib, fully catalytic Ila, hybrid, partial inactive catalyst Recuperative small-scale Gasoline or JET Natural gas Advanced Technology Surface Reactor Detailed composition is proprietary, 2-3 stages FeCrAl-metal monolith washcoated with metal oxide, first stage Pd Atm + Ultra-short channels yield low emissions, low pressure drop and good fuel efficiency + Prevent catalyst overtemperature, no second mixing —Control of post-catalytic autoignition delay time 19 15, 176, 177... 

Keywords Borghi diagram Combustion Chemical reactions Chemical kinetics Damkohler number Flamelets Ignition Karlovitz number Mixing-controlled... 

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