Computationally efficient evaluation of optimum homogeneous charge compression ignition operating range with accelerated multizone engine cycle simulation
| Autor: | Russell Whitesides, Salvador M. Aceves, Juan Manuel Garcia-Guendulain, J.M. Riesco-Ávila, Alejandro Ramirez-Barron |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry 020209 energy Mechanical Engineering Homogeneous charge compression ignition Nuclear engineering Aerospace Engineering Ocean Engineering 02 engineering and technology Thermal stratification Computational fluid dynamics 020401 chemical engineering Automotive Engineering 0202 electrical engineering electronic engineering information engineering Range (statistics) 0204 chemical engineering Gasoline Engine cycle business |
| Zdroj: | International Journal of Engine Research. 22:2293-2304 |
| ISSN: | 2041-3149 1468-0874 |
| DOI: | 10.1177/1468087420929488 |
| Popis: | The very intensive calculations necessary to define a performance map requiring evaluation of over a hundred individual operating points can be efficiently conducted with accelerated multizone for engine cycle simulation, leading to a definition of regions of acceptable and optimum homogeneous charge compression ignition operation. Accelerated multizone for engine cycle simulation has the virtue of enabling accurate evaluation of many operating conditions based on thermal stratification data from a single fluid mechanics run at motored conditions. This is possible because thermal stratification is more sensitive to engine geometry than to operating conditions. In this article, accuracy of accelerated multizone for engine cycle simulation is demonstrated by comparison with experimental data for iso-octane homogeneous charge compression ignition operation over a broad range of lean equivalence ratios (0.14–0.28). The validated accelerated multizone for engine cycle simulation model is then applied to generating a performance map for an engine controlled by appropriately adjusting equivalence ratio and internal exhaust gas recirculation. Regions of acceptable and optimum combustion are identified. It is finally demonstrated that while indicated mean effective pressure remains low for optimum homogeneous charge compression ignition operation (1–4 bar), this is sufficient for a large fraction of typical driving in light-duty vehicles. Much driving including idle can therefore be done in homogeneous charge compression ignition mode at high efficiency and low (essentially zero) NO x and particulate matter emissions. |
| Databáze: | OpenAIRE |
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