Re: Noisy Vaporizing Burners?
Posted by:
Jeff Theobald (IP Logged)
Date: July 24, 2002 09:14PM
<HTML> The burner on my Brooks is fitted with a drilled cast plate, the burner howl's with a low pitch note when first started, as the temperature rises the pitch of the note increases, occasionally, seeming to jump an octave, at times the sound is unpleasant, but by the time full pressure is reached and we are ready to move off, it will normally only howl for a moment on refiring, out on the road, when the burner is running well and making good steam it will make a pleasant warbling sound, that always makes Pauline comment that the car is happy and singing.
In the Serpollet the burner is slotted and it howl's and scream's all the time, not a bad thing when you are doing a demonstration as it always keeps people back away from the car, again the burner when first lit gives a very low note, which climbs in frequencey as it warms up, sounding like a jet engine slowly winding up, again occasionally jumping an octave.
Myself I have noted that the smaller the combustion box area the more likely, and louder the howling will be, changing the jet size will change things, bigger jets= more noise, and better steaming, I think what is happening is, if complete combustion has not occured in the fire box then unburnt vapor will flash off in the tubes producing a sound, and giving better heat transfer, which would explain why the cars go so much better if howling a little, Jeff.</HTML>