Design of atmospheric gas burners. . RNERS WITH INJECTING TUBES With injecting tubes of good design the curves as shown inFigs. 21 to 27, inclusive, were obtained. These curves show the Limtt of 0pvrsttiofi /vrt*>* y/afer ffas • .: - \ 1 - 1 fflnct ftjoe 3urnerJ,Off Sf. M -/ ,60Ort/icx Pwsjsk I I \ ^8i .««g23< ;?0 aN^SS ^fe^^- ^ 40 ^V, r ?kwr — ?% «=? s * jy*r FlG. 26.—v4«V injection secured -with specific gravity gas at orifice pressures of 2, 4,and 6 inches of water in a square inch port area burner with and without i
Design of atmospheric gas burners. . RNERS WITH INJECTING TUBES With injecting tubes of good design the curves as shown inFigs. 21 to 27, inclusive, were obtained. These curves show the Limtt of 0pvrsttiofi /vrt*>* y/afer ffas • .: - \ 1 - 1 fflnct ftjoe 3urnerJ,Off Sf. M -/ ,60Ort/icx Pwsjsk I I \ ^8i .««g23< ;?0 aN^SS ^fe^^- ^ 40 ^V, r ?kwr — ?% «=? s * jy*r FlG. 26.—v4«V injection secured -with specific gravity gas at orifice pressures of 2, 4,and 6 inches of water in a square inch port area burner with and without improvedinjecting tube : and i-35 rates of consumption of burners of , ,square inches port area. A still more efficient injecting tube, shown by No. i in Fig. 13,was designed later. With this design it is possible to secure. SO 63 7a £a Jdzte - Czz&ec Fesf per Noar FlG. 27.—Air injection secured with specific gravity gas at orifice pressures of 2, 4,and 6 inches of water in a square inch port area burner without improved injectingtube slightly higher rates of consumption as indicated from the pressurecurves in Fig. 15. The following table will show the results from the above-mentioned figures for gases of and specific gravities withburner cold, and for a specific gravity with burner hot: Design of Atmospheric Gas Burners 5i TABLE 6.—Rate of Consumption of Pipe Burners With Injecting Tubes [Air-gas ratio, 3 to 1; specific gravity of gas, ; burners cold] Total port area in square inches Ratio of port area to area of pipe Cubic feet per hour at inches water pressure Cubic feetper hour per squareinch ofport area 65101126 .75 [Values calculated from the foregoing figures, for a gas of specific gravity; burners cold]
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