Combustion characteristics of isolated sub-millimeter sized methyl butanoate (MB) droplets are studied at low gravity (10 4 m/s) in a 1.2 s drop tower. In the experiments, droplets were grown and deployed onto the intersection of two 14 lm silicon carbide fibers in a cross-string arrangement and exposed to symmetrically placed spark ignition sources. The initial droplet diameter was fixed at 0....

Abstract: Properly understanding heat flux characteristics is a crucial prerequisite to efficiently applying a regenerative burner in an aluminum reheating furnace. A series of experiments was conducted in this study in order to establish a database of the best available burners according to furnace temperature, excess air ratio, and flame combustion mode as they affect heat flux characteristic...

There are many incentives to increase the fuel efficiency of combustion processes. This paper looks at two available options to achieve this goal. The former aims to develop an experimental method that can analyze combustion at extremely high pressures to improve the understanding of high pressure H2/air combustion. Experimental data has been lacking a suitable combustion diagnostic to visualiz...

Carbon dioxide (CO2) emitted from conventional coal-based power plants is a growing concern for the environment. Chemical looping combustion (CLC), pre-combustion and oxy-fuel combustion are promising CO2 capture technologies which allow clean electricity generation from coal in an integrated gasification combined cycle (IGCC) power plant. This work compares the characteristics of the above thr...

The objective of the present study was to experimentally investigate and compare characteristics three oxygen-enhanced combustion (OEC) methods; premix enrichment (PE), air-oxy/fuel (AO), additionally also oxygen lancing (OL) method. overall concentration varied from 21% 38%. Combustion tests were carried out using gas burner with thermal input 750 kW fired by natural gas. OEC methods, such as ...

The ignition of electrically heated boron filaments in air and argon/oxygen mixtures has been studied. Boron filament resistance, temperature, and emissions from the BO and BO2 bands were monitored. Preliminary experimental data have also been obtained to characterize the phases formed inside burning boron particles produced and ignited from the same filament material by feeding a vibrating bor...

This paper addresses the experimental investigation of coal combustion characteristics (ignition, burnout and NO formation) under oxy-steam conditions. Two coals are selected in order to compare effect rank: bituminous sub-bituminous ones. The experiments have been conducted an electrically-heated entrained flow reactor for a set O2/N2, O2/CO2 O2/H2O/CO2 atmospheres, with O2 concentrations up 3...