The video
show a Briggs and Stratton running on gasoline alcohol
and
acetylene, I wish it were possible to do this with the
rotary to
test some ideas
Working Engine With Crystal Clear Head Shows
Combustion Process In
Real Time
http://altdriver.com/story/working-engine-with-crystal-clear-head-shows-combustion-process-in-real-time/
Alex Molteno
Can you share those ideas Alex? :-)
Paul Lamar
I was thinking along the ideas and modifications you
Frank and
others were talking about a few weeks ago, guiding
flame fronts,
additional spark pugs (side by side) more complete
combustion of
hydrocarbons instead of mixture igniting while going
out the exhaust,
changing compression ratios with inserts, additional
shapes to induce
more swirl for complete combustion.
If you could film it in real time what a great way to
test these
ideas if it were possible to have a clear view on to
the rotary
combustion chamber.
Alex Molteno
Attempts have been made to do that in the recent past
(2015) on the
rotary but due to the geometry and other temperature
considerations
it has not been very successful.
What has worked recently has been CFD. CFD gives you
velocity and
pressure. CFD is improving all the time. If somebody
built my idea of
a multiple piece rotor that bypassed squish air it
would be very
very difficult to see that optically. It was CFD
results that gave me
the idea.
Paul Lam
Interesting video with the clear window.
When I was
Corning Glass R&D in the early '60s, one of the
engineers in my group was working on a clear glass
drip coffee pot made of a strong ceramic similar to
their low expansion ovenware (CorningWare®),
except it was CLEAR and could be heated on a burner
and then quenched in an ice bath with no failure
(Very low thermal expansion). I still have an early
prototype of the Pot that he gave me.
The only
apparent problem with the product was that the coffee
in the pot had a muddy appearance and was dropped. I
suspect that Corning continued to develop it, as I
surmise this ceramic had other commercial applications
as it is easy to form complex shapes before it is
processed into a clear ceramic.
Joel
Mayhall
Over the
Hill Ceramic Materials Engineer
Tempe,
AZ
I think this squish flow problem is worth spending some
R&D money on. I think we have learned enough about
what is happening inside the engine with the CFD and
transparent engines.
The next step is to prove some modification to the rotor
that will actually work in reducing the fuel burn.
That will take back to back dyno runs. One engines with
and one engine with out while carefully measuring the
fuel consumption with a very accurate flow meter.
Mazdatrix has the dyno. I can buy an accurate
flow meter. We can obtain a stock RX8 engine for base
line fuel measurements and another for modification.
Both
using the stock RX8 fuel injection system.
Jeff Doodridge built some titanium rotors. I never found
out what happened when and if
they were tested. However that experience can be useful
when we make new test rotors.
Also Curtiss Wright was thinking about aluminum rotors
if not actually building and testing some.
Since a multi piece rotor has the potential of reducing
the heat transfer into the rotor
oil cooled aluminum test rotors would be it easier to
machine.
Paul Lamar
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