CFD

Reacting Flows & Combustion

Combustion is a complex process that involves the interaction of fluid dynamics, thermodynamics, and chemical kinetics. In order to design efficient combustion systems, it is important to understand the underlying physics and chemistry of the process. Reacting flows and combustion simulations can be used to model and predict the behavior of combustion systems under different conditions.

Reacting flows refer to fluid flows that involve chemical reactions. Combustion is a typical example of a reacting flow, where fuel and oxidizer are mixed together and ignite to release heat energy. Combustion simulations involve solving the governing equations of fluid dynamics, heat transfer, and chemical kinetics, along with boundary conditions and initial conditions, to predict the behavior of the combustion system.

The accurate modeling of combustion chemistry is critical to designing efficient and environmentally friendly combustion systems. Chemical kinetics models describe the chemical reactions that take place during combustion, including the rate at which reactants are consumed and products are formed. Advanced chemistry solvers, such as detailed chemical kinetic mechanisms or reduced chemical models, can be used to predict the formation of pollutants and other undesirable combustion byproducts.
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Reacting Flows & Combustion
domain// CFDReacting Flows & Combustion

Detailed Chemistry

In order to accurately model combustion, it is important to account for the interactions between turbulence, mixing, and chemical reactions. Turbulence models are used to capture the turbulent flow behavior of the fuel and oxidizer mixture, while mixing models are used to predict the mixing of fuel and oxidizer. Chemical kinetics models are used to describe the chemical reactions that …

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Engine Exhaust Aftertreatment

Engine exhaust aftertreatment systems are designed to reduce emissions of harmful pollutants such as NOx, CO, and particulate matter from the exhaust gases of engines and power generation equipment. These systems typically use a combination of physical and chemical processes, such as selective catalytic reduction (SCR), diesel particulate filters (DPF), and oxidation catalysts, to convert or remove pollutants from the …

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Fuel Injectors & Spray Simulation

Fuel injectors and spray simulation are important aspects of the design and optimization of internal combustion engines. CFD software, such as AVL Fire, Siemens Star-ccm+, Ansys Fluent, and Converge, are well-equipped to simulate fuel injectors and spray processes, including liquid atomization, drop breakup, collision and coalescence, turbulent dispersion, spray cavitation, drop-wall interaction, and drop evaporation. The simulation of fuel injectors …

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Gas Turbine Combustion

With using advanced and specialized CFD tools such as AVL Fire, Siemens Star-ccm+, Ansys Fluent and Converge, OLTRION engineers can accurately predict important kinetically limited gas turbine phenomena such as ignition, flashback, and lean blow off. In addition, we can investigate the combined effects of chemistry and turbulence and optimize combustor performance parameters.

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