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A study was conducted on flame behavior and NO x emission characteristics in co-axial counter-swirl injector for gas turbine engine under various inner swirl levels and quarl angles.The study was carried out with a fixed total heat release rate of 5 kW, using global equivalence ratio, hydrogen co-firing ratio, quarl angle, and inner swirl number as key parameters.Five distinct flame shapes were identified based on the global equivalence ratio and hydrogen co-firing ratio.It was observed that the inner swirl number and quarl angle influence the mixing performance between the premixed methane-oxidizer flow through the outer nozzle and the hydrogen flow from the inner nozzle, as well as the recirculation zone, leading to variations in flame behavior and NO x emissions.초 록 동축 역선회 인젝터에서 다양한 내부 선회강도와 Quarl 각도에 따른 화염거동과 NO x 배출특성에 관한 연구 가 수행되었다.총 열 발생률이 5 kW로 고정된 상태에서 글로벌 당량비, 수소 혼소율,
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Hong et al. (2025) studied this question.
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