what's it like in there
what's it like in there
(OP)
A character on a Yahoo group insists that inside his mildly supercharged British twin the mixture is "honey thick" as TDC approaches.
His concern today is specifically in the region of the spark plug gap.
There are so many modern papers concerned with intake induced tumble and swirl persisting during compression and even during combustion I have to wonder how viscous a few hundred degree F compressed gasoline/air mixture really can be.
Am I assuming things I should not/
thanks
Dan T





RE: what's it like in there
That does not speak to its viscosity.
But at ~300 psi / 300F ? Room temp honey? Hard to accept.
Mike Halloran
Pembroke Pines, FL, USA
RE: what's it like in there
barely 13x increase in density
TTFN

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RE: what's it like in there
From www.nist.gov/data/PDFfiles/jpcrd283.pdf
air at 500K and 2.5 MPa (round numbers a little higher than Mike's estimates above) has a dynamic viscosity of about 27 x 10^-6 Pa-s, or about 5 orders of magnitude less than honey. In fact, even at 100 MPa or about 14,500 psi, and 1200K, it's still only about 55 x 10^16 Pa-s.
RE: what's it like in there
RE: what's it like in there
RE: what's it like in there
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