hey guys. I'm not sure if this is still relevant, but nozzle design angles were being discussed further up. I was just reading about similar things for air ducting. An abrupt size change such as an orfice will kill flow and create turbulance. A slow taper is much better, but uses valuable space. 40 degrees is the maximum safe angle to reduce a nozzle at to maintain laminar flow. (when 0deg=no change, 90deg=orfice)
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