Pressure Effects on Flowing Mildly-Cracked n-Decane

Pyrolysis of hydrocarbon fuel ZH-100 under different pressures

“…Ward et al [8] found that, the conversion of n-decane increases with increasing pressure, while herein the effect of pressure on the conversion is more complex. Only a qualitative explanation can be afforded at this time.…”

“…The primary products by pyrolysis of n-C 10 -C 14 under near-critical and supercritical conditions were C 1 -C mÀ2 n-alkanes and C 2 -C mÀ1 1-alkenes, and the secondary products were cis-and trans-2-alkenes, n-C mÀ1 , n-C m+1 , and C m+2 -C 2mÀ2 normal and branched alkanes, where m is the number of carbon atoms in the reactant; the major liquid products from n-butylbenzene were styrene and toluene, and the main liquid products from n-butylcyclohexane were 1-methylcyclohexene and cyclohexane; the thermal decomposition of decalin and tetralin was dominated by isomerization reactions, and was different to the results obtained under low pressure and high temperature conditions where cracking reactions (for decalin) or dehydrogenation reactions (for tetralin) dominate. Ward et al [8] studied the effects of pressure on flowing, mildly cracked, supercritical n-decane. It was found that increasing pressure enhances bimolecular pyrosynthesis reactions, compared with unimolecular reactions, and increases the overall conversion rate due to the increased density and the prolonged retention time.…”

Numerical Simulation of the Conjugate Heat Transfer in the Cooling System of the Combustion Chambers of the Aviation Ramjet on the Endothermic Fuels

“…Thermal decomposition of EF is non-stationary process: on each time layer first computed Ψ w on the heated walls of the channel (9) and afterΨ is computed in the domain (8). Verification of the model requires large computationat efforts and now the simplified model based on assumption that DΨ = 0 will be used for EF simulation.…”

“…Instead of real EF, the model uses some fictitious substance that decomposes without any intermediate reactions (so-called one-step pyrolytic mechanism) [5,6]. Empirical constants and functions described the fictitious substance decomposition are chosen for obtaining good agreement between computed and experimental data for real EF [7,8]. Advantage of the simplest model is the least computational efforts as compared with more complicated models.…”

Performance evaluation of power generation system with fuel vapor turbine onboard hydrocarbon fueled scramjets

“…The compositions of fuel vapor mixtures vary with both temperature and pressure [16]. The composition of fuel vapor at different temperatures and pressures is necessary to predict the working capacity of a turbine.…”