An investigation found that "the insulating effect of the engine cover" increased temperatures beneath it causing the "ignition of co-located components".
In order make good on her promise to Congress, Barra must prevent the kinds of engineering failures that caused the ignition problems in the first place and the organizational failures that propelled the problem to its current tragic magnitude.
At higher pressures, turbulent flows caused the ignition temperatures to continue to follow the second limit resulting in ignition temperatures higher than the laminar values.
For smaller droplets, higher initial droplet velocity causes the ignition to occur earlier, whereas for larger droplets, higher initial droplet velocity delays the ignition time.
Additional hard factual evidence such as the position of the projectile/powder rammer and the subsequent delay in retracting the rammer to allow closing of the breech provides credibility to the theory that an intentional human act caused the ignition of the powder charge.
Strong winds aloft and the development of a strong convection plume led to the transport of firebrands over considerable distances causing the ignition of spotfires up to 33 km ahead of the main fire front.
However, when extended to lower temperatures (T < 850 K), the model shows that the mixed butanols addition to TPRFs causes the ignition delay times to increase and hence behaves like an octane booster at engine-like conditions.
It is also found that if the ratio of turbulence to ignition delay timescale is short, resultant diminished scalar fluctuations cause the overall ignition to occur by spontaneous ignition.
Pyrolysis modeling is, subsequently, carried out, to relate the moisture content with the model parameters and to explain the possible physical mechanisms that cause the difference in ignition times between wet and dry samples.
