Burning Rate in Impinging Jet Flames

Table 1

Experimental conditions.

No.	𝑑^a	𝑈^b	Fuel	Φ^c	𝑆𝐿	𝜎^d	𝑢′^e	Flame
	(m)	(m/s)			(m/s)		(m/s)
1	0.075	5	CH4	1.0	0.365^f	7.513	0.30	Cho et al. [15], case 1
2	0.1	5^g	C2H6	1.0	0.76^h	8.004	0.4	Cheng and Shepherd [16], s9
3	0.03	3.6	CH4	0.89	0.307	7.077	0.2	Li et al. [17], h4^i
4	0.03	3.6	CH4	0.89	0.307	7.077	0.2	Li et al. [17], h6
5	0.035	0.75	CH4	0.6	0.085	5.544	0.06	Stevens et al. [18], set 1
6	0.035	3	CH4	1.0	0.365	7.513	0.33	Stevens et al. [18], set 2
7	0.035	2.25	CH4	1.3	0.213	7.112	0.18	Stevens et al. [18], set 3

^a𝑑 is the distance between the jet exit and the wall (see Figure 1).
^b𝑈 is the mean axial flow velocity in the jet exit.
^cΦ is the equivalence ratio.
^d𝜎 is the density ratio.
^e𝑢′ is the rms turbulent velocity.
^fFor CH₄-air mixtures, the values of the laminar flame speeds 𝑆_L, reported in Table 1, were estimated using recent experimental data [26].
^gThis value was reported by Bray et al. [19] (see footnote on page 645 in the cited paper).
^hThis value was reported by Cheng and Shepherd [16].
ⁱThe main difference between the two flames studied by Li et al. [17] was the diameters (h = 4 and 6 mm) of holes in grids used to generate turbulence.