Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Numerical Simulation of Hydrogen Air Supersonic Coaxial Jet
Abstract In the present study, the turbulent structure of coaxial supersonic H2–air jet is explored numerically by solving three dimensional RANS equations along with two equation k–ε turbulence model. Grid independence of the solution is demonstrated by estimating the error distribution using Grid Convergence Index. Distributions of flow parameters in different planes are analyzed to explain the mixing and combustion characteristics of high speed coaxial jets. The flow field is seen mostly diffusive in nature and hydrogen diffusion is confined to core region of the jet. Both single step laminar finite rate chemistry and turbulent reacting calculation employing EDM combustion model are performed to find the effect of turbulence-chemistry interaction in the flow field. Laminar reaction predicts higher H2 mol fraction compared to turbulent reaction because of lower reaction rate caused by turbulence chemistry interaction. Profiles of major species and temperature match well with experimental data at different axial locations; although, the computed profiles show a narrower shape in the far field region. These results demonstrate that standard two equation class turbulence model with single step kinetics based turbulence chemistry interaction can describe H2–air reaction adequately in high speed flows.
Numerical Simulation of Hydrogen Air Supersonic Coaxial Jet
Abstract In the present study, the turbulent structure of coaxial supersonic H2–air jet is explored numerically by solving three dimensional RANS equations along with two equation k–ε turbulence model. Grid independence of the solution is demonstrated by estimating the error distribution using Grid Convergence Index. Distributions of flow parameters in different planes are analyzed to explain the mixing and combustion characteristics of high speed coaxial jets. The flow field is seen mostly diffusive in nature and hydrogen diffusion is confined to core region of the jet. Both single step laminar finite rate chemistry and turbulent reacting calculation employing EDM combustion model are performed to find the effect of turbulence-chemistry interaction in the flow field. Laminar reaction predicts higher H2 mol fraction compared to turbulent reaction because of lower reaction rate caused by turbulence chemistry interaction. Profiles of major species and temperature match well with experimental data at different axial locations; although, the computed profiles show a narrower shape in the far field region. These results demonstrate that standard two equation class turbulence model with single step kinetics based turbulence chemistry interaction can describe H2–air reaction adequately in high speed flows.
Numerical Simulation of Hydrogen Air Supersonic Coaxial Jet
Dharavath, Malsur (Autor:in) / Manna, Pulinbehari (Autor:in) / Chakraborty, Debasis (Autor:in)
Journal of The Institution of Engineers (India): Series C ; 98 ; 575-585
18.06.2016
11 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Numerical Simulation of Hydrogen Air Supersonic Coaxial Jet
| Online Contents | 2017
Numerical Simulation of Hydrogen Air Supersonic Coaxial Jet
| Springer Verlag | 2017
Numerical aspects of non-coaxial model implementations
| Online Contents | 2010
Numerical Simulation of a Quasi-one-dimensional Supersonic Gas-liquid Two-phase Flow
| British Library Online Contents | 2011
| British Library Online Contents | 2010