Spark gaps characteristics

Energy Considerations and Spark Characteristics. Many effects listed under items 1 to 7 play. important roles in spark initiation because they affect the amt and rate of energy transfer from the storage capacitor to the spark gap. The energy delivery.can be detd in part by observations made on the... 

Energy Considerations and Spark Characteristics. Many effects listed under items 1 to 7 play important roles in spark initiation because they affect the aimt and rate of energy transfer from the storage capacitor to the spark gap. The energy delivery. can be detd in part by observations made on the electrical circuit. MSW carried out these measurements for a number of tests and provided some analytical treatment of their circuits. The only. quantitative result which. can be drawn from their work is that only about 15% of the stored energy was actually delivered to the spark gap when a series resistance greater than 1000 ohms was placed in the circuit (Ref 35,p 13)... 

Explosion characteristics of dust clouds are generally examined by the Hartmann apparatus (Fig. 3.84) developed in USA. It consists of a vertical combustion tube of 1200 cm volume, 305 mm long and 64 mm inside dia., mounted over a brass dispersion cup. The powder sample is placed in the cup and dispersed by an air stream of 50 cm injected at a pressure of 7 bar. The ignition source is usually a pair of electrodes with a spark gap of 3 to 6 mm mounted at the lower one-third level of the tube. A wire coil igniter can also be used. 

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