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This helps to explain the results obtained while boosting the intake pressure in the HCCI engine.
The fuel blends that had higher fuel sensitivity were more resistant to autoignition for low intake temperature and high intake pressure and less resistant to autoignition for high intake temperature and low intake pressure.
Meanwhile, the response time of intake pressure can be decreased by 23.6 67.7%.
Further the scavenging parameters, such as trapping ratio, delivery ratio and scavenging efficiency, are analyzed with different intake pressure.
On the other hand, the head developed decreased with higher gas flow rates and lower intake pressure.
However, the GE LM2500+ was more predisposed to intake pressure drops since it functioned at a higher overall pressure ratio.
Similar(34)
However, for higher intake temperatures and lower intake pressures the n-heptane/toluene fuel and the PRF fuel had similar combustion phasing.
Experiments were performed over the range of 0 50% n-heptane liquid volume fractions, at equivalence ratios 0.4 and 0.5, and intake pressures from 1.4 bar to 2.2 bar.
For high intake pressures and low intake temperatures, a sensitivity analysis at the moment of maximum heat release rate shows that the consumption of phenoxy radicals is rate-limiting when a toluene/n-heptane fuel is used, which makes this fuel more resistant to autoignition than the primary reference fuel.
The kinetic models with added co-oxidation reactions further predicted that an n-heptane/toluene fuel with the same RON as the corresponding primary reference fuel had higher resistance to auto-ignition in HCCI combustion for lower intake temperatures and higher intake pressures.
A conventional 100-cm3 four-stroke internal combustion engine was modified to a two-stroke compressed air engine and its output power and fluid properties at various intake pressures and rotational speeds were examined.
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