Eksperimentalno fotometrijsko ispitivanje strukture laminarnog plamena nadstehiometrijske smeše propan - butan - vazduh

Abstract

Razvijena je eksperimentalna optička metoda za identifikaciju i merenje relativne koncetracije CH* radikala u cilju identifikacije karakterističnih zona fronta laminarnog predmešanog plamena gasovitih goriva. Izvršena su eksperimentalna istraživanja karakterističnih lokalnih zona prisustva radikala, raspodele koeficijenta viška vazduha i zona nastajanja NO u laminarnom plamenu savremenog atmosferskog gorionika. Sistematski su varirani koeficijent viška vazduha od 1,0 do 1,4 i toplotne snage gorionika u opsegu 2:1, pri laminarnim režimima strujanja (Re brojevi plamenih otvora u opsegu od 100 do 250). Istražena je korelacija relativne koncentracije CH* radikala, zona formiranja CH i OH radikala, raspodele koeficijenta viška vazduha, temperature i emisije NOx. Pokazano je da je ovom fotometrijskom metodom moguće kvalitativno pratiti front plamena i optimirati proces sagorevanja u cilju ostvarivanja stabilnog plamena i smanjene emisije NOx u realnim sistemima sagorevanja.

An experimental optical method has been developed in order to identify and measure relative concentration of CH* radicals in order toidentifycharacteristic zones of laminar premixed laminar gaseous fuels-air flames. Experimental investigation of characteristic local zones in terms of presence of radicals, distribution of air coefficient and production of NO in laminar flames of an up to date atmospheric burner was conducted. Systematic variation of air coefficient (from 1.0 to 1.4) and heating power (2:1 span) was performed. Re number of flame ports varied between 100 and 250. Correlation between CH* radical and CH and OH radicals zones, air coefficient, temperature distributions and NOx emission was found. It was shown that, based on this photometric method, it was possible to monitor flame front qualitatively and to optimize combustion in order to establish stable flame and lower NOx emission in real combustion systems