Flame quenching during dual-fuel operation investigated in experiments and simulation

Peter A, Frühhaber J, Schuh S, Lauer T, Winter F, Priesching P, Wensing M (2018)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2018

Event location: Valencia ES

Abstract

Dual-fuel or substitution engines become more important in the field of maritime propulsion due to more stringent emission legislation. A ship propelled with HFO may use natural gas in protected areas. The ignition and combustion process of a premixed natural gas-air environment are curtailed by knocking combustion and flame quenching. Both phenomena are known from SI gas engines. In combination with high compression ratios and high loads of heavy IC engines, combustion instabilities cause unacceptable emissions.
One challenge is a too lean natural gas-air atmosphere in the combustion chamber. To avoid flame quenching, a balanced composition of injected diesel amount and natural gas-air mixture for each operation point is necessary. This work introduce a volume balance to characterize the contained energy in a dual-fuel spray plume, based on Schlieren and mass flow rate measurements in a constant volume combustion chamber. Furthermore, the ambient natural gas content in rapid compression machine (RCM) experiments is varied, comparing the heat release rates to assess the rate of fuel conversion. An AVL FIRE CFD simulation of the RCM with an optimized reaction scheme is used to investigate the ignition process of the initial diesel gas mixture in the spray plume and the combustion in the premixed gas phase, respectively. The insight into the detailed chemistry allows to understand the influence of the gas equivalent ratio the early flame development.

Authors with CRIS profile

Andreas Peter Professur für Fluidsystemtechnik Michael Wensing Professur für Fluidsystemtechnik

Involved external institutions

Technische Universität Wien / Vienna University of Technology AT Austria (AT) AVL Deutschland GmbH DE Germany (DE)

How to cite

APA:

Peter, A., Frühhaber, J., Schuh, S., Lauer, T., Winter, F., Priesching, P., & Wensing, M. (2018). Flame quenching during dual-fuel operation investigated in experiments and simulation. In Proceedings of the Conference on Thermo- and Fluid Dynamic Processes in Direct Injection Engines (THIESEL). Valencia, ES.

MLA:

Peter, Andreas, et al. "Flame quenching during dual-fuel operation investigated in experiments and simulation." Proceedings of the Conference on Thermo- and Fluid Dynamic Processes in Direct Injection Engines (THIESEL), Valencia 2018.

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