The Influence of Elevated Pressures on the Methane Combustion in N2 and Co2 Dilutions

Kancherla, Raghu Veera Manikantachari; Martin, Scott M.; Bobren, Jose O.; Vasu, Subith

doi:10.2514/6.2017-4851

53rd AIAA/SAE/ASEE Joint Propulsion Conference 2017

DOI: 10.2514/6.2017-4851

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The Influence of Elevated Pressures on the Methane Combustion in N2 and Co2 Dilutions

Raghu Veera Manikantachari Kancherla¹,

Scott M. Martin²,

Jose O. Bobren³

et al.

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2020

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Influence of Equation-of-States on Supercritical CO2 Combustion Mixtures

Manikantachari

Rahman

Martin

et al. 2020

Journal of Energy Resources Technology

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Fossil fuel based direct-fired supercritical CO2 (sCO2) cycles are gaining the attention of industry, academia and government due to their remarkable efficiency and carbon capture at high-source temperatures. Modeling plays an important role in the development of sCO2 combustors because experiments are very expensive at the designed operating conditions of these direct-fired cycles. Inaccurate density estimates are detrimental to the simulation output. Hence, this work focuses on comprehensive evaluation of the influence and applicability various equation-of-states (EOS) which are being used in the supercritical combustion modeling literature. A state-of-the-art supercritical combustion modeling methodology is used to simulate counter-flow supercritical CO2 flames by using various equation-of-states. The results show that using the corresponding state principle to evaluate compressibility factor is not accurate. Also, van der Waal type EOSs predictions can be as accurate as complex Benedict-Webb-Rubin EOSs; hence van der Waal EOSs are more suitable to simulate sCO2 combustor simulations. Non-ideal effects are significant under the operating conditions considered in this work. The choice of EOS significantly influences the flame structure and heat release rate. Also, assuming the binary interaction parameter as zero is reasonable in sCO2 combustion simulations.

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Influence of Equation-of-States on Supercritical CO2 Combustion Mixtures

Manikantachari

Rahman

Martin

et al. 2020

Journal of Energy Resources Technology

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show abstract

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The Influence of Elevated Pressures on the Methane Combustion in N2 and Co2 Dilutions

Cited by 1 publication

References 11 publications

Influence of Equation-of-States on Supercritical CO2 Combustion Mixtures

Influence of Equation-of-States on Supercritical CO2 Combustion Mixtures

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