scispace - formally typeset
Open AccessJournal ArticleDOI

Studies on the Penetration of Fuel Spray in a Diesel Engine

Yutaro Wakuri, +3 more
- 01 Jan 1959 - 
- Vol. 3, Iss: 9, pp 123-130
TLDR
In this paper, the characteristics of spray penetration are discussed from the viewpoint of momentum theory based on the idea that the air induced into a fuel jet stream makes a kind of mixed gas together with fuel droplets.
Abstract: 
Regarding the penetrating distance of fuel spray in a diesel engine, the old theory dealing with the motion of a fuel droplet in still air is recognized not to coincide with the actual phenomenon in a diesel engine because of the extremely small size of atomized fuel droplets and the very high density of gas in cylinder. In this paper, the characteristics of spray penetration are discussed from the viewpoint of momentum theory based on the idea that the air induced into a fuel jet stream makes a kind of mixed gas together with fuel droplets. According to the results of experiment, the authors confirmed that the theory was satisfactory, that there existed the simple relations among several dimensionless numbers which indicate the effect of various factors on the spray penetration, that there is a close relationship between the spray cone angle and penetration, and others.

read more

Citations
More filters
Proceedings ArticleDOI

Effects of Gas Density and Vaporization on Penetration and Dispersion of Diesel Sprays

Jeffrey Naber, +1 more
- 01 Feb 1996 - 
TL;DR: In this paper, the authors examined the effect of ambient gas density and fuel vaporization on the penetration and dispersion of diesel sprays over a gas density range spanning nearly two order of magnitude.
Proceedings ArticleDOI

Scaling Liquid-Phase Fuel Penetration in Diesel Sprays Based on Mixing-Limited Vaporization

Dennis L. Siebers
- 01 Mar 1999 - 
Journal ArticleDOI

The influence of cavitation on the internal flow and the spray characteristics in diesel injection nozzles

Francisco Payri, +3 more
- 01 Mar 2004 - 
TL;DR: In this paper, a study was carried out on the influence of cavitation on the internal flow and the macroscopic behavior of the spray in Diesel injection nozzles, and the results of this hydraulic characterisation, together with the predetermined dimensional characterization, enable the discharge coefficient and the critical cavitation conditions to be determined.
Journal ArticleDOI

Experimental and analytical study on biodiesel and diesel spray characteristics under ultra-high injection pressure

Xiangang Wang, +4 more
- 01 Aug 2010 - 
TL;DR: In this paper, spray characteristics of biodiesels (from palm and cooked oil) and diesel under ultra-high injection pressures up to 300 MPa were studied experimentally and analytically.
Proceedings ArticleDOI

Multi-Zone DI Diesel Spray Combustion Model for Cycle Simulation Studies of Engine Performance and Emissions

Dohoy Jung, +1 more
Abstract: A quasi -dimensional, multi-zone, direct injection (DI) diesel combustion model has been developed and implemented in a full cycle simulation of a turbocharged engine. The combustion model accounts for transient fuel spray evolution, fuel-air mixing, ignition, combustion and NO and soot pollutant formation. In the model, the fuel spray is divided into a number of zones, which are treated as open systems. While mass and energy equations are solved for each zone, a simplified momentum conservation equation is used to ca lculate the amount of air entrained into each zone. Details of the DI spray, combustion model and its implementation into the cycle simulation of Assanis and Heywood [1] are described in this paper. The model is validated with experimental data obtained in a constant volume chamber and engines. First, predictions of spray penetration and spray angle are validated against measurements in a pressurized constant volume chamber. Subsequently, predictions of heat release rate, as well as NO and soot emissions are compared with experimental data obtained from representative heavy-duty, turbocharged diesel engines. It is demonstrated that the model can predict the rate of heat release and engine performance with high fidelity. However, additional effort is require d to enhance the fidelity of NO and soot predictions across a wide range of operating conditions.
References
More filters

Spray Penetration with a Simple Fuel Injection Nozzle

Harold E Miller, +1 more
TL;DR: The results have shown that the effects of both chamber and fuel pressures on penetration are so marked that the study of sprays by means of high-speed photography or its equivalent is necessary if the effects are to be appreciated sufficiently to enable rational analysis.