Effect of Fuel Temperature on the Performance of a Heavy-Duty Diesel Injector Operating with Gasoline Argonne National Laboratory

Format:

Book

Conference/Event

Author/Creator:

Torelli, Roberto, author.

Contributor:

Pei, Yuanjiang

Sellnau, Mark

Som, Sibendu

Traver, Michael

Zhang, Yu

Conference Name:

SAE WCX Digital Summit (2021-04-13 : Live Online, Pennsylvania, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

In this last decade, non-destructive X-ray measurementtechniques have provided unique insights into the internal surfaceand flow characteristics of automotive injectors. This has in turncontributed to enhancing the accuracy of Computational FluidDynamics (CFD) models of these critical injection systemcomponents. By employing realistic injector geometries in CFDsimulations, designers and modelers have identified ways to modifythe injectors' design to improve their performance. In recentwork, the authors investigated the occurrence of cavitation in aheavy-duty multi-hole diesel injector operating with ahigh-volatility gasoline-like fuel for gasoline compressionignition applications. They proposed a comprehensive numericalstudy in which the original diesel injector design would bemodified with the goal of suppressing the in-nozzle cavitation thatoccurs when gasoline fuels are used. The analysis was carried outat several levels of injection pressure (between 1000 and 2500 bar)and it was found that the new designs could almost completelyprevent cavitation occurrence up to 1500 bar. In this study, thebest candidate from the previous work was evaluated numerically byvarying the fuel's injection temperature between 20 °C (293 K)and 120 °C (393 K), for a total of four temperature levels. Allsimulations were performed using an unsteady RANS formulationcoupled with the Individual Species Solution method. Relativelyshort, transient injections (<1.0 ms) with 1500 bar injectionpressure and 100 bar ambient pressure were simulated to replicateone of the most demanding operating conditions expected in theengine. The performance of the injector was assessed in terms ofmass flow rate and fuel vapor volume fraction within the orificesfor both the realistic X-ray geometry and the improved one. Thisstudy highlighted the benefit offered by the new injector design interms of in-nozzle cavitation suppression and helped to quantifythe effect of fuel temperature on the amount of injected fuel undershort injection duration conditions

Notes:

Vendor supplied data

Publisher Number:

2021-01-0547

Access Restriction:

Restricted for use by site license