| 제목 |
부분적 예혼합 LPG/공기 화염에서 음향가진이 NOx배출에 미치는 영향 |
| 분야 |
전기동력자동차 |
| 언어 |
Korean |
| 저자 |
김태권(계명대학교), 박성호(경일대학교), 장준영(계명대학교) |
| Key Words |
NOx emission(질소산화물 배출), Partially permixed flame(부분적 예혼합염), Acoustic excitation(음향가전), Excitation frequency(가진 주파수), Flame control(화염 제어) |
| 초록 |
Measurements of NO and NOx emission of laminar partially premixed LPG/air names with and without acoustic excitation are reported. The NOx emission at the tailpipe of a combustion chamber is determined by chemiluminescent analyser. Thc NOx measurements are taken in flames with several different center tube equivalance ratio( φ_c), and overall equivalace ratio(φ_o) for a fixed fuel flowrate. The NOx emission decrease to reach a minimum value at an optimum φ_c?? 2. Theφ_ c ??2 flame gives a compromise of thermal NO and prompt NO mechanism. In the case of excitation, the visual shape of the flame is changed from laminar flame to turbulent-like flame. With increasing levels of excitation amplitude, an optimum value of the NO and NOx emission exists. A shorter name caused by the enhanced upstream mixing due to acoustic excitation results in the reduction of NO and NOx emission in the present flames. The reduction of flame length affects the shorter residence time of center tube mixture, and significantly influences the NOx reduction. |
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