Design of atmospheric gas burners. . are to continue any part of theinvestigation. Some of the following discussion may seem elementary, butour experience has shown that the problem is difficult becauseof the large number of variables involved and the difficulty ofkeeping in mind the proper relation between the several fac-tors. For that reason an attempt has been made to show clearlyby means of illustrations and solutions of simple problems theeffect of each variable. Design of Atmospheric Gas Burners It is hoped that the information in this paper will be of prac-tical assistance to the manuf
Design of atmospheric gas burners. . are to continue any part of theinvestigation. Some of the following discussion may seem elementary, butour experience has shown that the problem is difficult becauseof the large number of variables involved and the difficulty ofkeeping in mind the proper relation between the several fac-tors. For that reason an attempt has been made to show clearlyby means of illustrations and solutions of simple problems theeffect of each variable. Design of Atmospheric Gas Burners It is hoped that the information in this paper will be of prac-tical assistance to the manufacturers of gas appliances, as wellas to the industrial gas-appliance engineers who are frequentlyrequired to design and make their own burners for many specialpurposes. II. DESCRIPTION OF APPARATUS AND METHODS OF TEST A photograph of the apparatus used at this Bureau where thesetests were made is shown in Fig. i. The arrangement of theapparatus is shown in Fig. 2. Regulator _ /S •* S 77nfrmom*t*t* forty Cu. Ft] Tank en+ovahlo Lid. Fig. 2.—Arrangement of apparatus used for burner tests1. METERS AND REGULATORS In order to obtain higher pressures at the orifice than wereavailable from the gas supply line, it was found necessary topump the gas from the line into a weighted 40 cubic foot gas gas was measured with a carefully calibrated wet temperature and pressure of the gas were read at the time ofeach meter reading. At the outlet of the meter there were placedin series a dry regulator, and a special gas bag which served asan excellent antifluctuator. This combination gave such uni-form pressure at the orifice that the slight kicks from the meterwere hardly perceptible in the burner pressure, except at thehigher gas rates. The air supply was taken from a regular laboratory supply pressure was reduced by two dry regulators in series. A gasbag connected at the outlet of each regulator eliminated theremaining fluctuation caused by the compressor. A 3
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