RE: Converging Diverging Nozzle
Hi Daniel
In a supersonic HVOF system, there is a simple design, it consist of a high pressure chamber, where a mix of gases is ignited, then gases at high pressure enter a special like Laval-nozzle or barrel, which is a tube with a pinch inside, before the barrel pinch, there is a convergent zone, in order to create a supersonic pressure wave, so while gasses enter the barrel , it accelerates as it is compressed, at the pinch zone, gases matches about sound speed, and after which hole is divergent, gases speed becomes supersonic as it expand inside the divergent zone of the barrel. So convergent at the beginning, then quite cylindrical at the pinch zone, and divergent at the end of the barrel.
Best regards
Luigi
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