Youngbin Yoon
서울대학교 기계항공공학부 · 공학
유진빈 윤 교수의 연구실은 주로 연소 및 유체역학 분야에서 활동하며, 특히 수소 및 혼합가스 연료의 비예초형 제트-flame에서의 화염 안정성, 폭발 한계, NOx 배출 특성에 중점을 두고 있습니다. 고속 유동, 캐비테이션, 유량 조절 등 내부 유동 특성이 연료 분사 및 연소 성능에 미치는 영향을 실험적으로 분석하며, 연소기구 설계 및 환경적 영향 최소화를 위한 기초 연구를 수행하고 있습니다. 특히 수소 기반 연료의 안정적 연소 기반 기술 개발에 기여하고자 합니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
The effects of orifice internal flow, such as cavitation and hydraulic flip, on the breakup processes of the liquid jet injected perpendicularly into subsonic crossflows were studied experimentally. Orifice diameters, injection pressure differentials, and the shapes (sharp and round) of the orifice entrance were varied to provide several conditions for orifice internal flow. Photographs of liquid flow inside the orifice confirmed the internal flow condition. The liquid column breakup lengths, an
Abstract An extensive set of flame blowout limit curves has been measured for the case of a hydrogen jet flame surrounded by a heated, supersonic, coflowing air stream and some ideas are proposed to explain the observed trends. The stagnation temperature of the Mach 2.2 air stream was varied from 294 K up to the autoignition temperature of 900 K; hydrogen injection velocities were varied up to 1191 m/s. It was found that the flame blowout curves display two distinct stable regions which are boun
Peer Reviewed
Abstract NOx emission characteristics and EINOx scaling of hydrogen and H2/CO syngas non-premixed jet flames under turbulent condition are investigated. Flame length and NOx concentration were measured simultaneously for four different syngas compositions (100/0, 75/25, 50/50, and 25/75 H2/CO% vol.) and three different fuel nozzle diameters (2.5, 3.0, and 3.5 mm). The jet flames were in the buoyancy-momentum transition regime. NOx emission is reduced with increased Reynolds number and increased
