Validated Reduced Computational Methods for Realistic RDC Injection Modeling

William Stumbar; William Stigliano; Jack Grunenwald; Peter Salek; Venkat Athmanathan; Terrence Meyer; Austin Webb; Chris Fugger; Kenji Miki; Doug Perkins; James Braun

NASA NTRS · 20240015353

Validated Reduced Computational Methods for Realistic RDC Injection Modeling

William Stumbar·William Stigliano·Jack Grunenwald·Peter Salek·Venkat Athmanathan·Terrence Meyer·Austin Webb·Chris Fugger·Kenji Miki·Doug Perkins·James Braun

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Abstract

This paper outlines a simplified computational method without chemistry for single and multi-injector performance for rotating detonation combustion (RDC) environment as well as relevant performance metrics. For non-reactive cases, an unsteady pressure profile from a Method of Characteristics (MOC) simulation was used to simulate an RDC combustion wave travelling around the annulus. In reactive cases, a pre-mixed stoichiometric mixture of hydrogen and air is injected into a 2D unwrapped combustion chamber with a specified injector area. The performance is evaluated based on several performance metrics including unsteady discharge coefficient, average mass flux coming into the combustor, and percentage time obstructed. Finally, the computational method was validated through an experimental RDC test setup with a single element injector in a hydrogen-air detonation driver environment.

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William Stumbar, William Stigliano, Jack Grunenwald, Peter Salek, Venkat Athmanathan, Terrence Meyer, Austin Webb, Chris Fugger, Kenji Miki, Doug Perkins, James Braun. Validated Reduced Computational Methods for Realistic RDC Injection Modeling. https://ntrs.nasa.gov/citations/20240015353

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