Self-Excited Noise Generation from Laminar Methane/Air Premixed Flames in Thin Annular JetsPut
환형제트에서의 메탄과 공기의 층류 예혼합 화염에서 발생되는 자발적인 소음에 대한 실험적 연구
Abstract
Self-excited noise generation from laminar flames in thin annular jets of methane/air premixture has been investigated experimentally. Various flames were observed in this flow configuration, including conical shape flames, ring shape flames, steady crown shape flames, and oscillating crown shape flames. Self-excited noise with the total sound pressure level of about 70dB was generated from the oscillating crown shape flames for the equivalence ratio larger than 0.95. Sound pressure and