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Supercritical Combustion Simulation

Ashini, Hossein | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 51035 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Farshchi, Mohammad
  7. Abstract:
  8. Combustion in supercritical conditions (thermodynamic) is one of the most important applications of today's systems. One of the reasons for the increased use of combustion in supercritical conditions is the need to develop high pressure combustion systems, such as liquid fuel engines, gas turbines and internal combustion engines. Combustion is a technique in which the fuel is injected into the combustion chamber with its supercritical state (Any substance at a temperature and pressure above its critical point). Fuels in the supercritical conditions exhibit new features such as low viscosity, high diffusivity and low surface tension, which lead to higher efficiency, high power generation and low NOx emissions. The characteristics of supercritical combustion are low ignition delay, short combustion duration, and high reaction rate. In this thesis, has been tried to model real gas by modifying the equation of state relations and the ideal gas energy equation. By applying this model to the opposed one-dimensional flow, the governing equations for real gas conditions are corrected. Using these modified equations, Cantera software, which is utilized for ideal gases, has been developed for real gas conditions to be able to solve an opposed one-dimensional flow in real gas conditions. The results are the inputs necessary to construct the look-up table that is required for combustion simulation by Flamelet method. Using pre-made look-up tables and the Flamelet method, combustion in supercritical conditions can be simulated to investigate the behavior of reactive flow in supercritical conditions by numerical solvers
  9. Keywords:
  10. Real Gases ; Combustion ; Supercritical Combustion ; Flamelet Model ; Contera Software ; Laminal one Dimensional Opposed Flow

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