- #1
percy1
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Hi
I'm trying to build a system to generate a spark with sufficient energy to ignite a freely expanding jet of methane, but with a quite short duration, ca. 20ms (if that is classed as short?) The purpose being to examine concentration fluctuations of gas (in a jet) above and below the flammability limits due to turbulence. I have pretty limited experience of electronics so am I hoping for some guidance, primarily so I have confidence in what I am doing, and am not going to do my self an injury.
From some internet research i think the way to go is to use a car ignition coil connected to a car battery, then the high voltage wire coming off the coil will spark with a suitable ground when the low voltage circuit is completed and then broken. Does this sound right? Are there any other components that i should have?
With a system like this how do you control the spark duration? Does varying the spark gap does this? (To keep the expt’s relevant I need to have a gap below 2/3mm), And also how can I determine the spark duration?
Any guidance or references to textbooks on this subject would be much appreciated
percy
I'm trying to build a system to generate a spark with sufficient energy to ignite a freely expanding jet of methane, but with a quite short duration, ca. 20ms (if that is classed as short?) The purpose being to examine concentration fluctuations of gas (in a jet) above and below the flammability limits due to turbulence. I have pretty limited experience of electronics so am I hoping for some guidance, primarily so I have confidence in what I am doing, and am not going to do my self an injury.
From some internet research i think the way to go is to use a car ignition coil connected to a car battery, then the high voltage wire coming off the coil will spark with a suitable ground when the low voltage circuit is completed and then broken. Does this sound right? Are there any other components that i should have?
With a system like this how do you control the spark duration? Does varying the spark gap does this? (To keep the expt’s relevant I need to have a gap below 2/3mm), And also how can I determine the spark duration?
Any guidance or references to textbooks on this subject would be much appreciated
percy