An experimental investigation of the pulsation frequency of flames

摘要: Measurements of the pulsation frequency in non-premixed flames were conducted for gaseous and liquid fuels. performed over a wide range Froude number (≈10−4 to ≈103), Reynolds (≈10 ≈103) burner diameter (0.0074 m 0.30 m). The fuel velocity at exit had weak influence on some diameters. Strouhal plotted as function inverse was shown correlate measurements determined here well reported literature pulsations burning gaseous, solid fuels 14 orders magnitude number. Previous effect enhanced gravitational level also interpreted terms number—Froude relationship. Stability limits investigated. critical needed initiate measured methane propane flames. Flow visualization used measure an isothermal buoyant gas stream (10−3 1). A plot correlated measurements, but yielded different power law exponent than reacting flow case.