Interesting paper. One nice takeaway is that flame speed (for that engine) sits around 1.5 x mean piston speed.Tommy Cookers wrote: ↑Mon Apr 17, 2017 5:36 pmnow here's a useful reference that I've just rediscovered (originated by another poster) flame speed measurements in a Ferrari F1 V8 at 16000 rpm etc http://ltces.dem.ist.utl.pt/lxlaser/lxl ... 12.2_6.pdf
Quote from http://www.egr.msu.edu/zhug/Conference% ... zation.pdf
"The distributed ignition sites have also resulted in significant reductions in spark timing for the jet ignition system when compared to the lean spark ignition operating conditions. It is noted that the jet ignition pressure rise rates can also be controlled to typical stoichiometric spark ignition levels using an ultra lean main chamber. However for equivalent stoichiometric conditions, jet ignition combustion typically has pressure rise rates which are approximately 50% higher when compared to spark ignition combustion."