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<p>Pulse detonation combustion offers thermodynamic advantages to the next generation of combustion systems. The  thermodynamic efficiency is substantially improved over constant-pressure combustion systems by utilizing  detonation-based combustion that occurs typically between 40 and 60 pulses per second. An existing four-inlet  combustor was modified to a single-inlet arm design for integration with a rotary-valve concept. This paper discusses  the design process of the single-inlet combustor so that it provides the same operation and reliability characteristics as  its four-inlet predecessor. The design was derived from analysis through Computational Fluid Dynamics (CFD),  which compared a variety of single-inlet arm designs to the four-inlet model. Cold flow analysis was achieved with  ANSYS CFX software to map the flow field through the combustor. The combustion features inside the engine, were  predicted with ANSYS FLUENT software. The inlet dump angle and ignition-shroud were selected from the results  in order to support the optimal environment for flame kernel growth and subsequent deflagration to detonation  transitions. After completion of computer modeling and analysis, the successful design was manufactured and  assembled for testing.
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<br>Subjects: Mechanical engineering; Combustion chambers; Computational fluid dynamics</div>
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Soria, Danny</div>
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