Effect of hybrid coaxial air and hydrogen jets on fuel mixing at supersonic crossflow

In this research study, a computational method is applied to examine the impacts of coaxial hybrid air and fuel jets on fuel mixing at the supersonic cross-flow of Mach = 4. This study examined the coaxial air and fuel jet effects on main parameters i. e. circulation, mixing efficiency, and fuel pen...

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Bibliographic Details
Published inInternational journal of hydrogen energy Vol. 46; no. 29; pp. 16048 - 16062
Main Authors Zhang, Yuelei, Barzegar Gerdroodbary, M., Hosseini, Saleh, Abazari, A.M., Li, Zhixiong
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 26.04.2021
Subjects
Coaxial jets
Combustion chamber
Fuel mixing
Numerical simulation
Supersonic flow
Supersonic flow
Numerical simulation
Combustion chamber
Coaxial jets
Fuel mixing
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Summary:In this research study, a computational method is applied to examine the impacts of coaxial hybrid air and fuel jets on fuel mixing at the supersonic cross-flow of Mach = 4. This study examined the coaxial air and fuel jet effects on main parameters i. e. circulation, mixing efficiency, and fuel penetration. Computational Fluid Dynamic is employed for the modelling of the coaxial jet at cross supersonic flow. Reynolds Average Navier-Stocks equations with SST turbulence model for achieving hydrodynamic feature of the main model. Impacts of air-jet pressure and nozzle configurations on fuel distribution are also presented and the main effective factors for efficient fuel mixing condition are explained. Our results disclosed that injection of coaxial air and fuel jets at supersonic cross airflow significantly improves the fuel penetration and mixing inside the combustion chamber. Flow study analysis shows that the coaxial injector augments the spiral feature of the fuel jet, which surges fuel mixing downstream. Our circulation analysis confirms that circulation strength increases in far away from an injector by the injection of a coaxial air jet. •Injection of hydrogen/air coaxial hybrid jet at supersonic cross flow is studied.•The mixing performance of the hydrogen/air coaxial jet in various jet diameters is investigated.•Effect of air jet pressure on mixing performance is fully investigated.•RANS equation are solved with SST turbulence model for the simulation of the supersonic cross flow.•Increasing coaxial jet diameter improves fuel penetration and mixing in downstream.
ISSN:0360-3199
1879-3487
DOI:10.1016/j.ijhydene.2021.02.070