The Study of the Effect of Functional Parameters of Hydrogen Combustion on Entropy Generation and Enthalpy Variations

Document Type : Original Article

Author

• Ali Asadi

Department of Mechanical Engineering, Faculty of Engineering, Bozorgmehr University of Qaenat, Qaen

10.22067/jacsm.2025.90295.1288

Abstract

Entropy generation and enthalpy variations are important parameters in hydrogen combustion. The main goal of this research is the study of the effect of functional parameters of hydrogen combustion on entropy generation and enthalpy variations. Numerical simulation was performed using the counterflow model of the CHEMKIN combustion software. Laminar flow was considered. The diffusion term was differenced using the central difference method and the displacement term was differenced using the upwind method. The differenced equations were solved using a two-point solver and time integration. Then, the effect of pressure and ambient temperature parameters as well as fuel and oxidizer inlet temperature and velocity on entropy generation and enthalpy variations were investigated. The results showed that the increase in pressure, fuel inlet temperature and oxidizer inlet temperature led to an increase in maximum temperature and enthalpy. But, increasing the inlet velocity of the oxidizer decreased the maximum temperature and enthalpy. Also, increasing the fuel inlet temperature and increasing the pressure increased and decreased the entropy level of the fuel, respectively.

Keywords

• Entropy Generation
• Enthalpy Variations
• Diffusion Flame
• Parametric Study
• Hydrogen Combustion

Main Subjects

• Combustion

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