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부분적 예혼합화염제어에 의한 연소라디칼 및 NOx 배출 특성
장준영(J.Y.Jang),정주영(J.Y.Joung),최경호(G.H.Choi),김경찬(K.C.Kim),김태권(T.K.Kim) 한국자동차공학회 1998 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1998 No.11_1
This paper presents an investigation on C₂. CH, OH radicals and NOx emissions in partially premixed flames with acoustic excitation. The radicals are visualized by the digital image technique with optical filters and ICCD while the NOx emission is determined by chemiluminescent detection. The measurements are taken in flames with φo = 0.5, center tube equivalence ratio(φc) varing from 1.1 to 5.0 for a constant fuel flow rate. Images of C₂. CH, and OH radicals resemble those of the flame appearances as the excitation phase is varied, and the radicals generated at the upstream are convected toward the downstream. It is inferred that the flame characteristics is being affected by the flow characteristics of fuel and air mixture. From the radicals and flame visualization under acoustic excitation, the reduction of flame length affects the shorter residence time of center tube mixture, and significantly influences the NOx reduction.<br/>