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| Re: Port polishing |
Subject: Re: Port polishing
by lamb_daiquiri on 2013/6/26 9:47:35
This is not bad as a rule of thumb but there are always exceptions. I find it hard to believe that flow could be laminar by the time it gets to the port or even that the boundary layer would be laminar. Usually smoother is better, sometimes roughness can re-energise the boundary layer and delay separation improving bulk fluid flow. Think golf balls.
What I do believe is that on very smooth/ mirrored surfaces fuel does not adhere and then re-vaporise as well as it does to a rough surface. Smooth surfaces limit heat transfer. If the fuel is well mixed before hitting the ports, polish to your hearts content. Over all I think it's a waste of time going from smoothed to polished, it'll end up covered in carbon eventually anyway. At least I've never seen one from service come out clean.
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