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Viewing 1 to 44 of 44
Technical Paper
2017-03-28
Author(s): Dong, P., Yamauchi, J., Nishida, K., and Ogata, Y.
Abstract With the aim of improving engine performance, recent trend of fuel injection nozzle design followed by engineers and researchers is focusing on more efficient fuel break up, atomization, and ....
Journal Article
2017-03-28
Author(s): Pandal, A., Pastor, J., Payri, R., Kastengren, A. et al.
Abstract The dense spray region in the near-field of diesel fuel injection remains an enigma. This region is difficult to interrogate with light in the visible range and difficult to model due to the ....
Technical Paper
2017-03-28
Author(s): Schroeter, R. and Meinhart, M.
Abstract The characteristics of gasoline sprayed directly into combustion chambers are of critical importance to engine out emissions and combustion system development. The optimization of the spray c....
Technical Paper
2017-03-28
Author(s): Saccullo, M., Andersson, M., Eismark, J., and Denbratt, I.
Abstract Laws concerning to emissions from heavy duty (HD) internal combustion engines are becoming increasingly stringent. New engine technologies are therefore needed to satisfy these new legal requ....
Technical Paper
2017-03-28
Author(s): Zhang, Y., Jia, M., Duan, H., Wang, P. et al.
Abstract The phenomenon of a thin liquid film separation and atomization at expanding corners during the spray/wall interaction is usually encountered in premixed charge compression ignition (PCCI) en....
Technical Paper
2017-03-28
Author(s): Kale, R. and Banerjee, R.
Abstract Use of bio fuels in a regular spark ignition engine is becoming common in several countries to reduce the dependence on fossil fuels and overall generation of green house emissions. Alcohols ....
Journal Article
2017-03-28
Author(s): Zhao, L., Torelli, R., Zhu, X., Scarcelli, R. et al.
Abstract Combustion systems with advanced injection strategies have been extensively studied, but there still exists a significant fundamental knowledge gap on fuel spray interactions with the piston ....
Technical Paper
2017-03-28
Author(s): Torelli, R., Som, S., Pei, Y., Zhang, Y. et al.
Abstract It is well known that in-nozzle flow behavior can significantly influence the near-nozzle spray formation and mixing that in turn affect engine performance and emissions. This in-nozzle flow ....
Technical Paper
2017-03-28
Author(s): Potham, S., Zhao, L., and Lee, S.
Abstract This paper aims to extend the existing Volume of Fluid (VOF) model by implementing an evaporation sub-model in an open source Computational Fluid Dynamics (CFD) software, OpenFOAM. The paper ....
Technical Paper
2017-03-28
Author(s): Pan, H., Xu, M., Hung, D., Lv, H. et al.
Abstract Increasing the injection pressure in DISI engine is an efficient way to obtain finer droplets but it will also potentially cause spray impingement on the cylinder wall and piston. Consequentl....
Journal Article
2017-03-28
Author(s): Pastor, J., Garcia-Oliver, J., Garcia, A., Zhong, W. et al.
Abstract Visualization of single-hole nozzles into quiescent ambient has been used extensively in the literature to characterize spray mixing and combustion. However in-cylinder flow may have some mea....
Technical Paper
2017-03-28
Author(s): Gong, C. and Baar, R.
Abstract The present work involves the technical background of the field of Diesel injection systems of combustion engines and compares the effects of two kinds of remedies (Re-meshing Technique and L....
Journal Article
2017-03-28
Author(s): Bode, M., Falkenstein, T., Davidovic, M., Pitsch, H. et al.
Abstract The performance of Gasoline Direct Injection (GDI) engines is governed by multiple physical processes such as the internal nozzle flow and the mixing of the liquid stream with the gaseous amb....
Technical Paper
2017-03-28
Author(s): Ge, M., Liang, X., Yu, H., Wang, Y. et al.
Abstract Spray impacting on a lube oil film with a finite thickness is a common phenomenon in IC engines and plays a critical role in the fuel-air mixture process and combustion. With the use of early....
Technical Paper
2017-03-28
Author(s): Payri, R., Bracho, G., Marti-Aldaravi, P., and Viera, A.
In the present work a constant-pressure flow facility able to reach 15 MPa ambient pressure and 1000 K ambient temperature has been employed to carry out experimental studies of the combustio....
Technical Paper
2017-03-28
Author(s): Serizawa, K., Ueda, D., Mikami, N., Tomida, Y. et al.
Abstract The Diesel engine performance was drastically improved since the introduction of the Common Rail system in 1996. Over the years, the Common Rail technology was continuously improved to reduce....
Technical Paper
2017-03-28
Author(s): Tsang, C., Wang, Y., Wang, C., Shelburn, A. et al.
Abstract Large-eddy simulation (LES) is a useful approach for the simulation of turbulent flow and combustion processes in internal combustion engines. This study employs the ANSYS Forte CFD package a....
Technical Paper
2017-03-28
Author(s): Pastor, J., Garcia-Oliver, J., Garcia, A., and Nareddy, V.
Abstract Recent studies have shown that the use of highly premixed dual fuel combustion reduces pollutant emissions and fuel consumption in CI engines. The most common strategy for dual fueling is to ....
Technical Paper
2017-03-28
Author(s): Bravo, L., Ripplinger, S., and Samimi, O.
Abstract Numerical simulations of diesel reacting jets in a simulated engine environment were carried out to study the effect of oxygen concentration on the ignition delay time and lift-off length dyn....
Journal Article
2017-03-28
Author(s): Shen, S., Che, Z., Wang, T., Jia, M. et al.
Abstract Flash boiling spray is effective in improving the atomization and evaporation characteristics for gasoline direct injection engines. However, for a multi-hole injector the morphology structur....
Technical Paper
2017-03-28
Author(s): Beatrice, C., Migliaccio, M., Montanaro, A., Fraioli, V. et al.
Abstract In the aim of reducing CO2 emissions and fuel consumption, the improvement of the diesel engine performance is based on the optimization of the whole combustion system efficiency. The focus o....
Technical Paper
2017-03-28
Author(s): Allocca, L., Montanaro, A., Amoresano, A., Langella, G. et al.
Abstract The paper reports an innovative method of analysis based on an advanced statistical techniques applied to images captured by a high-speed camera that allows highlighting phenomena and anomali....
Technical Paper
2017-03-28
Author(s): Kim, S., Jarrahbashi, D., and Genzale, C.
Abstract This study investigates the role of turbulent-chemistry interaction in simulations of diesel spray combustion phenomena after end-of-injection (EOI), using the commercially-available CFD code....
Journal Article
2017-03-28
Author(s): Sphicas, P., Pickett, L., Skeen, S., Frank, J. et al.
Abstract Modeling plume interaction and collapse for direct-injection gasoline sprays is important because of its impact on fuel-air mixing and engine performance. Nevertheless, the aerodynamic intera....
Technical Paper
2017-03-28
Author(s): Li, H. and Rutland, C.
Abstract In this paper, large eddy simulation (LES) coupled with two uncertainty quantification (UQ) methods, namely latin-hypercube sampling (LHS) and polynomial chaos expansion (PCE), have been used....
Technical Paper
2017-03-28
Author(s): Shibata, H., Mizobuchi, T., Iwamuro, M., Koda, A. et al.
Abstract Gasoline direct injection (GDI) systems are a main development focus for global environment issues and energy security. At the same time, it is also important to challenge further development....
Technical Paper
2017-03-28
Author(s): Saha, K., Quan, S., Battistoni, M., Som, S. et al.
Abstract An extensive numerical study of two-phase flow inside the nozzle holes and the issuing jets for a multi-hole direct injection gasoline injector is presented. The injector geometry is represen....
Journal Article
2017-03-28
Author(s): Tang, M., Zhang, J., Zhu, X., Yeakle, K. et al.
Abstract Optical and laser diagnostics enable in-depth spray characterization in regards to macroscopic spray characteristics and in-situ fuel mixture quality information, which are needed in understa....
Technical Paper
2017-03-28
Author(s): Temme, J., Coburn, V., and Kweon, C.
Abstract The objective of the study was to investigate the spray and combustion characteristics of Jet Propellant-8 (JP-8) using a high-pressure fuel injector which is capable of up to 250-MPa fuel in....
Journal Article
2017-03-28
Author(s): Postrioti, L., Caponeri, G., Buitoni, G., and Van Vuuren, N.
Abstract In the present paper an innovative approach for the shot-to-shot hydraulic characterization of low pressure injection systems is experimentally assessed. The proposed methodology is an invers....
Technical Paper
2017-03-28
Author(s): Magnotti, G. and Genzale, C.
Abstract The atomization and initial spray formation processes in direct injection engines are not well understood due to the experimental and computational challenges associated with resolving these ....
Technical Paper
2017-03-28
Author(s): Wu, D., Sun, B., Xu, D., An, X. et al.
Abstract The pressure fluctuation characteristics of a constant pressure fuel system has great influence on its fuel injection characteristics. It is, therefore important to understand the impacts of ....
Technical Paper
2017-03-28
Author(s): Fitzgerald, R., Gehrke, C., Svensson, K., and Martin, G.
Abstract The performance of five positive k-factor injector tips has been assessed in this work by analyzing a comprehensive set of injected mass, momentum, and spray measurements. Using high speed sh....
Journal Article
2017-03-28
Author(s): Duke, D., Finney, C., Kastengren, A., Matusik, K. et al.
Abstract Given the importance of the fuel-injection process on the combustion and emissions performance of gasoline direct injected engines, there has been significant recent interest in understanding....
Technical Paper
2017-03-28
Author(s): Mariani, A., Cavicchi, A., Postrioti, L., and Ungaro, C.
Abstract In the present paper, a new methodology for the estimation of the mass delivered by a single hole of a GDI injector is presented and discussed. The GDI injector used for the activity featured....
Technical Paper
2017-03-28
Author(s): Bebe, J. and Andersen, K.
Abstract The purpose of this work is to determine essential spray parameters for a specific nozzle to be integrated in computational fluid dynamics (CFD) simulations of selective catalytic reduction s....
Technical Paper
2017-03-28
Author(s): Xu, Q., Xu, M., Hung, D., Wu, S. et al.
Abstract High fuel injection pressure has been regarded as a key controlling factor for internal combustion engines to achieve good combustion performance with reduced emissions and improved fuel effi....
Technical Paper
2017-03-28
Author(s): Matsumura, E., Senda, J., Imori, K., and Sakai, Y.
Abstract The flash boiling by fuel heating is a useful method to control the time spatial spray characteristics such as atomization of droplets, vaporization and air-fuel mixture concentration. It is ....
Technical Paper
2017-03-28
Author(s): Bebber, D. and Reuter, U.
Abstract The fuel consumption and emissions of diesel engines is strongly influenced by the injection rate pattern, which influences the in-cylinder mixing and combustion process. Knowing the exact in....
Technical Paper
2017-03-28
Author(s): Konagaya, R., Naitoh, K., TSURU, K., Takagi, Y. et al.
Abstract For various densities of gas jets including very light hydrogen and relatively heavy ones, the penetration length and diffusion process of a single high-speed gas fuel jet injected into air a....
Journal Article
2017-03-28
Author(s): Maes, N., Bakker, P., Dam, N., and Somers, B.
Abstract Multiple-injection strategies are characterized by a complex and transient interplay between high- and low-temperature reactions. Tracking low-temperature reaction products such as formaldehy....
Technical Paper
2017-03-28
Author(s): Ruth, D. and O'Connor, J.
Abstract The mixing of a diesel spray with in-cylinder gases is driven by both turbulent mixing during the free-jet penetration phase and by mixing during the jet’s impingement on surfaces such as the....
Technical Paper
2017-03-28
Author(s): Sun, Y., Sun, K., Lu, Z., Wang, T. et al.
Abstract Matching fuel injection and airflow motion is critical for the optimization of fuel-air mixing and combustion process in diesel engines. In this study, the effects of swirl flow on liquid dro....
Journal Article
2017-03-28
Author(s): Barro, C., Lucjan, A., Li, Z., Kyrtatos, P. et al.
Abstract Modern Diesel engines have become ever more complex systems with many degrees of freedom. Simultaneously, with increasing computational power, simulations of engines have become more popular,....
Viewing 1 to 44 of 44