Study of the generated density of cavitation inside diesel nozzle using different fuels and nozzles

Guang-jun, Jiang; Zhang, Yusheng; Hua, Wen; Xiao, Gan

doi:10.1016/j.enconman.2015.06.065

Cited by 64 publications

(30 citation statements)

References 30 publications

(28 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Authors attribute this pattern to reasons similar to those that promote it for non-reactive penetrations [22], considering how lift-off length is reasonably well correlated with jet penetration [34] and the coefficient trends of these injectors visible in [26]. Dodecane, being less viscous, must develop a higher Reynolds number and velocity [35]. In a cavitating regime as the induced by the Spray C nozzle, this high Re will increment the turbulence through the nozzle and the cavitation, enhancing the jet break-up, enlarging the spray angle and dropping the coefficient of area, or the effective diameter [36,37].…”

Section: Lift-off Lengthmentioning

confidence: 86%

Experimental study of the injection conditions influence over n-dodecane and diesel sprays with two ECN single-hole nozzles. Part II: Reactive atmosphere

Payri

Salvador

Gimeno

et al. 2016

Energy Conversion and Management

View full text Add to dashboard Cite

a b s t r a c tThe second part of this experimental analysis, presented in this paper, seeks to go deep on the characterization of the Spray C and Spray D nozzles from the Engine Combustion Network, investigating the penetration of fuel spray at reacting conditions alongside characteristic parameters of combustion such as ignition delay and lift-off length. Both ECN mono-orifice injectors have similar nozzle flow capacity but different conicity degrees and corner sharpness, being Spray C more susceptible to cavitate. Schlieren imaging technique was employed to quantitatively measure reactive penetration and ignition delay, while lift-off length was identified through OH ⁄ chemiluminescence. As in the inert part of this research, n-dodecane and commercial diesel were selected for the tests, thereby the effect of the fuel properties in the measured parameters was analyzed. Also, once again the concept of R-parameter, defined as the penetration derivative respect to the square root of time was calculated to delve into the penetration behavior. The experiments were performed in a constant pressure-flow facility able to reproduce engine-like thermodynamic conditions. Results revealed that R-parameter evolution can be divided in four stages: an inert zone, a 'bump', a 'valley' part and a quasi-steady one that overlaps the previous inert part. Those stages are highly governed by ambient temperature and oxygen concentration. Nozzle geometry and fuel properties demonstrated to have a noteworthy influence on all measured parameters.

show abstract

Section: Lift-off Lengthmentioning

confidence: 86%

Experimental study of the injection conditions influence over n-dodecane and diesel sprays with two ECN single-hole nozzles. Part II: Reactive atmosphere

Payri

Salvador

Gimeno

et al. 2016

Energy Conversion and Management

View full text Add to dashboard Cite

show abstract

“…Although combustion performance is out of the scope of this publication, different fuels will present different behaviors regarding nozzle flow characteristics. Som et al [36] presented a study of the effects of fuel properties on cavitation characteristics and nozzle-outlet turbulence kinetic energy, similar to the experimental micro-visualization work presented by Payri et al [37] and later Jiang et al [38]. However, neither of these studies show the influences that different cavitation regimes found for each fuel may have on spray formation.…”

Section: Introductionmentioning

confidence: 89%

The effect of nozzle geometry over the evaporative spray formation for three different fuels

Payri

Viera

Gopalakrishnan

et al. 2017

Fuel

View full text Add to dashboard Cite

“…In order to observe the atomization mechanism of the Y-Jet atomizer shown in Fig. 3, it is necessary to use a visualization mechanism inside it [70,71]; thence, for the first prototype, an atomizer was built in polymethyl methacrylate (PMMA); unfortunately, this material reacted with TPO due to the presence of aromatic compounds [72]. Therefore, the PMMA injector was tested only with water where the adherence of liquid on the walls of the mixing chamber was observed, which revealed a high concentration of liquid forming a layer on its walls according to the mechanism shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Design and study of a pure tire pyrolysis oil (TPO) and blended with Brazilian diesel using Y-Jet atomizer

Chumpitaz

Coronado

Carvalho

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

View full text Add to dashboard Cite

This manuscript aims to study the atomization and characterization of tire pyrolysis oil (TPO); thus, Y-Jet atomizers have been designed and manufactured by using an experimental bench, which was specifically built for such a purpose. The droplet size was measured experimentally and compared with the theoretical value obtained with the equation proposed by Wigg. The potential for production of TPO in Brazil from tires discarded for 2016 was approximately 190 million liters and in the world for the same year was 4160 million liters; these values represent an excellent alternative for the energetic use of these oils as well as a good way to valorize the by-products obtained from tire pyrolysis such as char and tire gas. The TPO can be used in combustion processes in pure form or mixed with other renewable or non-renewable fuels, so it is important to study atomization processes that guarantee an excellent quality of combustion. The spray quality generated by atomizing pure TPO and in blends (TPO-diesel) has been quantified by droplet size measurement through the Spraytec Malvern 2007 laser diffraction system, whose main properties have also been measured, such as density, viscosity and surface tension of pure liquid fuels and blends, liquid and gas flow pressure at the atomizer nozzle, and droplet size distributions generated by the atomized jet for different gas/liquid ratio values. The influence of the point where liquid pressure exceeds gas pressure at the atomizer nozzle, as well as the TPO percentage effect on droplet size, is demonstrated, and a comparison of experimental droplet size with the one which had been theoretically calculated by Wigg's equation is made. The study of the atomization of TPO, pure and blends, allows to know a favorable condition for its burning and provides a suitable destination for discarded tires. For a better characterization of the spray, the atomization cone angle was also measured for all the mixtures.

show abstract

Study of the generated density of cavitation inside diesel nozzle using different fuels and nozzles

Cited by 64 publications

References 30 publications

Experimental study of the injection conditions influence over n-dodecane and diesel sprays with two ECN single-hole nozzles. Part II: Reactive atmosphere

Experimental study of the injection conditions influence over n-dodecane and diesel sprays with two ECN single-hole nozzles. Part II: Reactive atmosphere

The effect of nozzle geometry over the evaporative spray formation for three different fuels

Design and study of a pure tire pyrolysis oil (TPO) and blended with Brazilian diesel using Y-Jet atomizer

Contact Info

Product

Resources

About