Lifted flame behavior of a non-premixed oxy-methane jet in a lab-scale slot burner

The effect of hydrogen addition on the flame behavior of a non-premixed oxy-methane jet in a lab-scale furnace

“…The flame luminescence became brighter when hydrogen mole fraction in the fuel jet increased. The flame inclination of the non-premixed oxy-methane jet toward the fuel jet side is thought to be due to the momentum difference between the fuel jet and the oxidizer [13].…”

Oxygen temperature variation of a non-premixed oxy-methane flame in a lab-scale slot burner

“…The widths of the slot nozzles (d F for fuel and d Ox for oxygen) were d F =0.24 mm and d Ox =0.52 mm, as shown in Fig. 1 (b) [23]. The length of each slot nozzle (l) was l=20 mm and the separation distance between the two nozzles (w) was w=8 mm.…”

“…In the current study, an empirical formula was derived as one of methods to explain and model the correlation between causes (i.e., flow conditions) and results (i.e., flame lengths). The concept of effective diameter was extended to the area of heated reacting flow in a slot burner comparing to a previous work [23].…”

“…The physical meaning of the effective diameter is the characteristic distance of a conceptually equivalent source that would flow in the same quantity as the actual source; e.g., mass flux and momentum flux. This concept of the effective diameter has been applied to an axisymmetric burner with various types of fuels [53], to the emission index of nitrogen oxide (EINO x ) scaling [51], to an axisymmetric burner with diluents [52], and to a slot burner with a non-premixed oxymethane flame under atmospheric conditions [23]. Previous studies in the field of flame length scaling using effective diameter are summarized in Table 4 [23,[51][52][53][54].…”

“…The equations for the effective nozzle width in the far-field and the near-field concepts are as follows [23]:…”