This paper illustrates a numerical and experimental analysis of performances and overall noise radiated from a common-rail, light-duty diesel engine. The engine was equipped with two different injection systems: an under-development, low-cost fuel injector and a commercial Bosch one, employed for automotive applications. The injector's behavior was compared throughout an experimental investigation that was carried out on a naturally aspirated, four strokes, two valves, single-cylinder engine (225 cm\u3 displacement). Both engine performances, pollutant and noise emissions were measured at different operating conditions for two injection strategies. Concerning the acoustic analysis, both structure-borne and gas-dynamic noise contributions were estimated using different experimental techniques. Contemporarily to the above campaign, a one-dimensional simulation of the investigated engine was performed, finalized to provide some information on the spray combustion and heat release realized by the two fuel injection systems (FIS). The numerical results were then compared to the experimental ones, in terms of heat release fraction, in-cylinder pressure signal and gas dynamic noise emissions.
Experimental and numerical analyses of performances and combustion noise of a common rail light duty D.I. Diesel engine
Siano D;Valentino G;Esposito Corcione F;
2007
Abstract
This paper illustrates a numerical and experimental analysis of performances and overall noise radiated from a common-rail, light-duty diesel engine. The engine was equipped with two different injection systems: an under-development, low-cost fuel injector and a commercial Bosch one, employed for automotive applications. The injector's behavior was compared throughout an experimental investigation that was carried out on a naturally aspirated, four strokes, two valves, single-cylinder engine (225 cm\u3 displacement). Both engine performances, pollutant and noise emissions were measured at different operating conditions for two injection strategies. Concerning the acoustic analysis, both structure-borne and gas-dynamic noise contributions were estimated using different experimental techniques. Contemporarily to the above campaign, a one-dimensional simulation of the investigated engine was performed, finalized to provide some information on the spray combustion and heat release realized by the two fuel injection systems (FIS). The numerical results were then compared to the experimental ones, in terms of heat release fraction, in-cylinder pressure signal and gas dynamic noise emissions.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
