Starting to Unpick the Unique Air–Fuel Mixing Dynamics in the Recuperated Split Cycle Engine
| Autor: | Konstantina Vogiatzaki, Robert Morgan, Simon A. Harvey, William Redpath, Guillaume De Sercey |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Control and Optimization
020209 energy Airflow Energy Engineering and Power Technology 02 engineering and technology Combustion Diesel engine recuperated split cycle engine lcsh:Technology 0203 mechanical engineering Schlieren Shock diamond internal combustion engine 0202 electrical engineering electronic engineering information engineering Electrical and Electronic Engineering atomisation Engineering (miscellaneous) Mixing (physics) thermal propulsion system efficiency emissions air–fuel mixing Renewable Energy Sustainability and the Environment lcsh:T Mechanics 020303 mechanical engineering & transports Split cycle engine Internal combustion engine Environmental science Energy (miscellaneous) |
| Zdroj: | Energies; Volume 14; Issue 8; Pages: 2148 Energies, Vol 14, Iss 2148, p 2148 (2021) |
| ISSN: | 1996-1073 |
| DOI: | 10.3390/en14082148 |
| Popis: | In this work air fuel mixing and combustion dynamics in the recuperated split cycle engine (RSCE) are investigated through new theoretical analysis and complementary optical experiments of the flow field. First, a brief introduction to the basic working principles of the RSCE cycle will be presented, followed by recent test bed results relevant to pressure traces and soot emissions. These results prompted fundamental questioning of the air-fuel mixing and combustion dynamics taking place. Hypotheses of the mixing process are then presented, with differences to that of a conventional Diesel engine highlighted. Moreover, the links of the reduced emissions, air transfer processes and enhanced atomisation are explored. Initial experimental results and Schlieren images of the air flow through the poppet valves in a flow rig are reported. The Schlieren images display shockwave and Mach disk phenomena. Demonstrating supersonic air flow in the chamber is consistent with complementary CFD work. The results from the initial experiment alone are inconclusive to suggest which of the three suggested mixing mechanism hypotheses are dominating the air–fuel dynamics in the RSCE. However, one major conclusion of this work is the proof for the presence of shockwave phenomena which are atypical of conventional engines. |
| Databáze: | OpenAIRE |
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