@InProceedings{FachiniFo:2005:ExMeDi,
               author = "Fachini Filho, Fernando",
          affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Extinction of methane diffusion flames enriched by hydrogen",
            booktitle = "Proceedings...",
                 year = "2005",
         organization = "International Congress of Mechanical Engineering, 18.",
             keywords = "bicomponent fuel, diffusion flame, Rate-Ratio Asymptotics, flame 
                         enriched by hydrogen.",
             abstract = "This work is an extension of previous analysis (1) which has 
                         studied the influence of hydrogen in the methane diffusion flames. 
                         In this paper the aim is to determine the stable condition for 
                         methane diffusion flames enriched by hydrogen in different levels 
                         of flame stretch The stretch on the flame is provided by the flow 
                         field imposed by two opposed streams, one of them is constituted 
                         by mixtures of hydrogen, methane and nitrogen and the other is 
                         constituted by air. The flow field conditions correspond to fuel 
                         stream velocities in the range 0.1 to 4.0 m/s, which are chosen to 
                         compare the results of the present analysis to those from the 
                         n-heptane diffusion flame. The result presentation follows the 
                         flamelet model, the flame properties are presented as a function 
                         of the scalar dissipation \χ = 2(\λ/\ρcp)(dZ/dx) 
                         2 , whose unit is s \−1 ; Z is the mixture fraction. The 
                         reciprocal of scalar dissipation \χ \−1 at the flame 
                         is a measure of the residence time of the reacting substances 
                         inside the flame. The results pointed out that methane diffusion 
                         flame without and with hydrogen is not strongly influenced by 
                         stretch. For mixtures with high hydrogen concentration, this 
                         influence is even smaller. For a fixed fuel mixture concentration 
                         (YCH4 + YH2), the flame temperature increases with the increase of 
                         the hydrogen mass fraction as a consequence, mainly, of the 
                         increase of the overall heat realised and, secondarily, of the 
                         reduction of the radiative energy losses via CO2 radiation.",
  conference-location = "Ouro Preto, MG",
      conference-year = "06-11 nov.",
             language = "en",
           targetfile = "fachini_extinction.pdf",
        urlaccessdate = "19 abr. 2024"
}