Stability Maps Impact of Channel Confinement and Wall Thermal Conductivity

2 Stability Maps Impact of Channel Confinement and Wall Thermal Conductivity 

To facilitate comparison with the nominal case studied, the stability curve of a propane-fueled microreactor with b = 0.5 mm, k — 2 W/mK and p — 5 bar is also provided in Fig. 7.8 the two velocity scales are such that any point in the horizontal axis has the same mass throughput either for h = 0.15 mm or for 

Increasing the wall thermal conductivity from 2 to 16 W/mK greatly broadens the combustion stability envelope, for reactors with h = 0.15 mm. Both propane and methane reactors benefit from the increased upstream heat transfer through the reactor wall and the assoeiated enhaneed preheating of the ineoming fuel/air mixture. The maximum allowable is inereased by almost threefold, while the maximum critical h also increases by 60% for both fuels. However, at low I/jn the extinction limits of reactors with high ks are lower than their low eounterparts. 

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Petrs J, Waumans T, Vleugels P, Al-Bender F, Stevens T, Verstraete T, Stevens S, D hulst R, Verstraete D, Fiorini P, Van Der Braembussche R, Driesen J, Puers R, Hendrick P, Baelmans M, Reynaerts D (2007) Micropower generation with microgasturbines a challenge. J Mech Eng Sci 221 489-500 

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