Authors:

Brenden Michael Bush

Date Created:

Not specified

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About Paper:

Counterflow burners are used in combustion and propulsion research because of their ability to stabilize flames that are typically unstable, enabling measurement of flame characteristics for the optimization of combustion systems. Specifically, this research aims to create a high-pressure counterflow burner with optical access that allows for testing laser diagnostics techniques that measure flame characteristics of combustion systems. The system must have a strong frame with windows that can be hydrotested to pressures up to 200 atm while not interfering with the diagnostic wavelengths involved with the experimental analysis. In addition, the contour for the co-annular nozzles must be designed to ensure boundary layer instabilities are negligible to maintain steady mass flow and produce a stable flame. A previous gas turbine rig was used for the frame with windows on all four side faces giving visibility into the combustion chamber. Four exhaust holes from a bottom flange are connected to a back-pressure valve and purge used reactants from the burner. To ensure the design can withstand the high theoretical pressures of future experiments, Finite Element Analysis (FEA) was conducted which showed negligible stress and deformation from a 200 atm test, justifying the burner's design. Lastly, the design for the co-annular nozzles underwent an iterative optimization process using boundary layer theory and Computational Fluid Dynamics (CFD) which certified stable and uniform flow will be generated. The results from FEA and CFD demonstrate the designed frame and nozzle can properly create a stable flame to be tested on. Keywords: Counterflow Burner; Computational Fluid Dynamics; Finite Element Analysis; Boundary Layer; Combustion

Source:

Purdue University / 2024

Topics:

No topics listed

Co-authors:

Brenden Michael Bush