Session: 06-06 Abnormal Combustion Modeling

Paper Number: 197480

197480 - Toward a Predictive Framework for H2 Injection and Combustion Simulations: An Integrated Experimental and Modeling Approach 

Abstract: 

The growing emphasis on sustainable lower-carbon intensity fuels, particularly hydrogen (H₂), has intensified the need for predictive and computationally efficient modeling tools for advanced engine combustion systems. This presentation describes the development of an integrated predictive framework for H₂ injection and combustion, established through a multi-institutional research effort within the IMPACT consortium. The framework targets coupled prediction of fuel injection, in-cylinder mixing and combustion, and abnormal combustion behavior, with emphasis on physical fidelity, robustness across operating conditions, and applicability to industry-relevant engine configurations.

The overall framework includes injector and jet characterization, and fuel-air mixing modeling, combustion and abnormal combustion simulations, and fundamental combustion property characterization. Experimental measurements of laminar flame speed under engine-relevant high-pressure and high-temperature conditions were conducted and used to systematically assess chemical kinetic model performance.

To assess combustion modeling, we evaluated engine configurations representative of a small light-duty tumble engine and heavy-duty swirl engines using port fuel injection (PFI) to isolate combustion model performance without consideration of mixing quality. We then extended the evaluation to direct injection (DI) configurations, demonstrating consistent predictive capability without case-by-case tuning. In addition, the Livengood-Wu Integral (LWI)-based knock propensity model was developed to characterize abnormal combustion and identify critical operating limits across a range of conditions.

Overall, this presentation provides a comprehensive overview of current progress and future directions for predictive modeling of advanced combustion systems for hydrogen fuel engine technology applications.

Presenting Author: Ji-Woong Park Aramco Americas: Aramco Research Center - Detroit

Presenting Author Biography: Dr. Ji-Woong Park is currently a senior research engineer at Aramco Americas: Aramco Research Center in Detroit. His research interests include accurate real-fuel modeling and developing reduced and tailored chemical kinetic models, for predictive engine CFD modeling.

Authors:

Ji-Woong Park Aramco Americas: Aramco Research Center - Detroit
Mickael Silva Aramco Americas: Aramco Research Center - Detroit
Emma Zhao Aramco Americas: Aramco Research Center - Detroit
Anqi Zhang Aramco Americas: Aramco Research Center - Detroit
Rafael Lago Sari Aramco Americas: Aramco Research Center - Detroit
Yuanjiang Pei Aramco Americas: Aramco Research Center - Detroit