Burning Velocity of Propane鈥揂ir Mixtures from Pressure鈥揟ime Records during Explosions in a Closed Spherical Vessel

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• 作者：Domnina Razus ; Venera Brinzea ; Maria Mitu ; Codina Movileanu ; Dumitru Oancea
• 刊名：Energy & Fuels
• 出版年：2012
• 出版时间：February 16, 2012
• 年：2012
• 卷：26
• 期：2
• 页码：901-909
• 全文大小：403K
• 年卷期：v.26,no.2(February 16, 2012)
• ISSN：1520-5029

文摘

The flame propagation during the deflagration of the propane鈥揳ir mixtures with variable initial concentration, pressure, and temperature ([C₃H₈] = 2.60鈥?.20 vol %, p₀ = 30鈥?00 kPa, and T₀ = 298鈥?33 K) in a spherical closed vessel with central ignition was monitored by means of pressure measurements. Using an improved relationship for the burnt mass fraction, the burning velocities were calculated from pressure鈥搕ime records over an extended duration of spherical propagation. A very good agreement was found between the burning velocities of atmospheric laminar C₃H₈/air flames and literature data. Computed burning velocities, obtained from numerical modeling of one-dimensional laminar flames using two detailed chemical kinetic schemes (Warnatz mechanism and GRI Mech 3.0, respectively) are discussed in comparison to experimental burning velocities. The measured burning velocities are correlated with pressure and temperature using a power law; the baric and thermal exponents, 谓 and 渭, lie within the usual range characteristic to alkane鈥揳ir laminar flames.