Swirl control strategies are useful methods for controllingmixture formation in HSDI Diesel engines. Test rigs allowsonly steady state measurements of the Swirl number, and giveonly a rough estimation of the charge motion during the actualcompression stroke within the engine. On the contrary, CFDsimulations are powerful tools to characterize the air flowdrawn into the cylinder, since they allow not only steady stateoperations, but also full dynamic modeling of the intake andcompression strokes. This paper studies an application ofcomputational fluid dynamics for predicting intake swirlintensity in an automotive 4 valve per cylinder D.I. Dieselengine. Two different intake ports are compared and the besttrade off between engine permeability and swirl intensity isassessed. Both steady state and dynamic simulations of theinduction process are carried out, and results demonstrate thatsteady state analysis is a reliable tool for predicting the portpermeability, while the same capability is not proved ininvestigating the organized charge motion within the chamber.
Comparison Between Steady and Unsteady CFD Simulations of Two Different Port Designs in a Four Valve HSDI Diesel Engine: Swirl Intensity and Engine Permeability / Fontanesi, Stefano; Cantore, Giuseppe; Montorsi, Luca; P., Ortolani. - ELETTRONICO. - (2004), pp. 335-346. (Intervento presentato al convegno Fall Technical Conference of the ASME International Combustion Engine Division tenutosi a Long Beach, CA, usa nel Ottobre 2004) [10.1115/icef2004-0908].
Comparison Between Steady and Unsteady CFD Simulations of Two Different Port Designs in a Four Valve HSDI Diesel Engine: Swirl Intensity and Engine Permeability
FONTANESI, Stefano;CANTORE, Giuseppe;MONTORSI, Luca;
2004
Abstract
Swirl control strategies are useful methods for controllingmixture formation in HSDI Diesel engines. Test rigs allowsonly steady state measurements of the Swirl number, and giveonly a rough estimation of the charge motion during the actualcompression stroke within the engine. On the contrary, CFDsimulations are powerful tools to characterize the air flowdrawn into the cylinder, since they allow not only steady stateoperations, but also full dynamic modeling of the intake andcompression strokes. This paper studies an application ofcomputational fluid dynamics for predicting intake swirlintensity in an automotive 4 valve per cylinder D.I. Dieselengine. Two different intake ports are compared and the besttrade off between engine permeability and swirl intensity isassessed. Both steady state and dynamic simulations of theinduction process are carried out, and results demonstrate thatsteady state analysis is a reliable tool for predicting the portpermeability, while the same capability is not proved ininvestigating the organized charge motion within the chamber.File | Dimensione | Formato | |
---|---|---|---|
ICEF2004-908-FINAL.pdf
Accesso riservato
Descrizione: Articolo completo
Tipologia:
Versione dell'autore revisionata e accettata per la pubblicazione
Dimensione
1.42 MB
Formato
Adobe PDF
|
1.42 MB | Adobe PDF | Visualizza/Apri Richiedi una copia |
Pubblicazioni consigliate
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris