High-Speed Diagnostics in a Natural Gas–Air Rotating Detonation Engine

Journell, Christopher L.; Gejji, Rohan; Walters, Ian V.; Lemcherfi, Aaron; Slabaugh, Carson D.; Stout, Jeffrey

doi:10.2514/1.b37740

Cited by 52 publications

(4 citation statements)

References 37 publications

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“…Finally, a power management study used Stochastic Adversarial Koopman Operator with Auxillary Neural Network for the quick learning of reduced order models that measure the state of charge of Lithium-ion batteries. Potentially applicable to some aircraft and specialized ground vehicles, one study used DMD in the diagnostics of natural gas rotating detonation engines [26].…”

Section: A General Studies Applicable To Vehiclesmentioning

confidence: 99%

Vehicular Applications of Koopman Operator Theory—A Survey

2023

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Koopman operator theory has proven to be a promising approach to nonlinear system identification and global linearization. For nearly a century, there had been no efficient means of calculating the Koopman operator for applied engineering purposes. The introduction of a recent computationally efficient method in the context of fluid dynamics, which is based on the system dynamics decomposition to a set of normal modes in descending order, has overcome this long-lasting computational obstacle. The purely data-driven nature of Koopman operators holds the promise of capturing unknown and complex dynamics for reduced-order model generation and system identification, through which the rich machinery of linear control techniques can be utilized. Given the ongoing development of this research area and the many existing open problems in the fields of smart mobility and vehicle engineering, a survey of techniques and open challenges of applying Koopman operator theory to this vibrant area is warranted. This review focuses on the various solutions of the Koopman operator which have emerged in recent years, particularly those focusing on mobility applications, ranging from characterization and component-level control operations to vehicle performance and fleet management. Moreover, this comprehensive review of over 100 research papers highlights the breadth of ways Koopman operator theory has been applied to various vehicular applications with a detailed categorization of the applied Koopman operator-based algorithm type. Furthermore, this review paper discusses theoretical aspects of Koopman operator theory that have been largely neglected by the smart mobility and vehicle engineering community and yet have large potential for contributing to solving open problems in these areas.

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Section: A General Studies Applicable To Vehiclesmentioning

confidence: 99%

Vehicular Applications of Koopman Operator Theory—A Survey

2023

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“…81,82 New research studies have emerged for experimenting with methane combustion at a higher-pressure, and/or under engine-relevant conditions. [83][84][85][86] As a subset of methane combustion chemistry, the pyrolytic reaction process is critical to predicting methane's combustion behavior and sooting propensity at fuel-rich conditions. Due to its importance, methane pyrolysis has also been extensively studied for many decades.…”

Section: Introductionmentioning

confidence: 99%

First principles reaction discovery: from the Schrodinger equation to experimental prediction for methane pyrolysis

Meisner

Chang

et al. 2023

Chem. Sci.

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“…The research was aimed for landbased power generation systems and it was found that the characteristic exhaust velocity of the RDE could reach 97.5-99.5% of the theoretical value compared to the thermodynamic cycle of constant-volume combustion. In addition, Journell et al [12] analyzed the combustion process of the RDE operating at working conditions similar to gas turbines by means of chemiluminescence and particle image velocimetry (PIV). Goto et al [13] conducted a rocket sled test for the thrust performance assessment of an RDE with an inner diameter of 60.5 mm.…”

Section: Introductionmentioning

confidence: 99%

Effects of inlet and secondary flow conditions on the flow field of rotating detonation engines with film cooling

Yao

et al. 2023

International Journal of Hydrogen Energy

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High-Speed Diagnostics in a Natural Gas–Air Rotating Detonation Engine

Cited by 52 publications

References 37 publications

Vehicular Applications of Koopman Operator Theory—A Survey

Vehicular Applications of Koopman Operator Theory—A Survey

First principles reaction discovery: from the Schrodinger equation to experimental prediction for methane pyrolysis

Effects of inlet and secondary flow conditions on the flow field of rotating detonation engines with film cooling

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