Relation between Tip Penetration and Droplet Size of Diesel Spray

Komada, Keisuke; Sakaguchi, Daisaku; Ueki, Hironobu; Ishida, M.

doi:10.4271/2013-01-1599

Cited by 9 publications

(4 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In spite of the differences in many test parameters (tables 1 and 5), the SMDs of LFO/diesel sprays reported by Hwang et al (2017) are similar to the SMDs of the present study. Kawaharada et al (2015) and Komada et al (2013) have also studied droplet diameters in diesel sprays, and the large range in their reported arithmetic mean diameters covers the results of this study. On the other hand, Cárdenas et al (2010) have found much smaller diameters, presumably due to substantially higher ambient temperatures.…”

Section: Droplet Sizessupporting

confidence: 74%

“…Nevertheless, the error due to motion blur was lower for the determination of opening angles as the transversal velocities of sprays are much lower. It is also noted that while Kawaharada et al (2015) and Komada et al (2013) have measured even higher velocities than the 200 m/s close to the nozzle, spray tip velocities decrease rapidly when increasing the distance from the injector. Using a characteristic length of 20 mm, the errors of 0.7 mm and 0.3 mm correspond to relative errors of 3.5% and 1.5%, respectively.…”

Section: Uncertaintiesmentioning

confidence: 98%

See 1 more Smart Citation

Optical Investigation of Spray Characteristics for Light Fuel Oil, Kerosene, Hexane, Methanol, and Propane

et al. 2019

View full text Add to dashboard Cite

The present study investigates fuel spray penetration and opening angles for EN 590 light fuel oil, kerosene, hexane, methanol, and propane. Furthermore, droplet sizes are studied for methanol and light fuel oil sprays from a single location at the edge of the sprays. The fuels were injected from a marine-size common rail diesel injector to a spray chamber filled with nitrogen, and the results were based on the analysis of shadow images. The results indicated that propane sprays would penetrate slower and less than the sprays of the other fuels, but that the differences are decreased and finally almost disappeared when increasing chamber density. Apart from the lowest tested chamber density of 1.2 kg/m 3 , propane formed significantly narrower sprays than the other fuels. With the exception of propane, the fuels had mostly similar responses to increased chamber densities. Variations between repetitions were large in relation to the differences in average values between the liquid fuels. Concerning droplet size measurements, the results suggested that methanol sprays would be characterized by slightly smaller droplet sizes than LFO sprays in the tested conditions. This finding is in line with an earlier study, albeit the found differences were smaller.

show abstract

Section: Droplet Sizessupporting

confidence: 74%

Section: Uncertaintiesmentioning

confidence: 98%

Optical Investigation of Spray Characteristics for Light Fuel Oil, Kerosene, Hexane, Methanol, and Propane

et al. 2019

View full text Add to dashboard Cite

show abstract

“…They also found that the small-sized droplets show a very broad axial and radial velocity range, while the large-sized droplets show a relatively narrow velocity range similar to the mean velocity of the whole of the pre-swirl spray. Komada et al [14] used a laser 2-focus (L2F) velocimetry technique to measure the velocity and size of droplets at the injection pressure of 800 bar in diesel sprays. They observed that droplets at the center have a higher velocity and the velocity decreases from the center towards the spray periphery.…”

Section: Introductionmentioning

confidence: 99%

Time-resolved droplet size and velocity distributions in a dilute region of a high-pressure pulsed diesel spray

Feng

Tang

Yin

et al. 2019

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

“…The measurement of the velocity and size of droplets was successfully conducted by the developed L2F at 0.5 mm downstream from nozzle orifice (Ueki, et al, 2004). The temporal changes of the spray tip penetration near the nozzle orifice observed by macroscopic images were related to the size of droplets inside sprays measured by the L2F (Komada, et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Effects of injector valve movement on diesel spray characteristics under short full valve opening

Kawaharada

Sakaguchi

Ueki

et al. 2015

JTST

Self Cite

View full text Add to dashboard Cite

A laser 2-focus velocimeter (L2F) was used for the measurement of diesel fuel sprays. Temporal and spatial changes in the number, velocity and size of droplets inside sprays were investigated near the nozzle orifice and were correlated with the needle valve lift of the injector nozzle. The L2F had a micro-scale probe which consists of two foci. The focal diameter was about 3µm, and the distance between two foci was 17µm. The data sampling rate of the L2F system was markedly high as 15MHz. Fuel sprays were injected intermittently into the atmosphere by using a common rail injector. The orifice diameter of the injector nozzle was 0.112mm and the rail pressure was 40MPa. The periods of solenoid energizing was set at 2.0ms. Measurement positions were located at 10mm downstream from the exit of the nozzle orifice. The results show that droplets mainly existed in the region off the spray center in the early injection period and concentrated at the spray center in the middle of injection period. Temporal changes in the number of droplets near the spray center were strongly affected by the needle lift and there in the relatively wide region were affected by the injection rate. Temporal changes in the droplet velocity near the spray center were strongly affected by the injection rate. The luminance distribution of the spray image was similar to the distribution of the number of droplets multiplied by the square of droplet size.

show abstract

Relation between Tip Penetration and Droplet Size of Diesel Spray

Cited by 9 publications

References 9 publications

Optical Investigation of Spray Characteristics for Light Fuel Oil, Kerosene, Hexane, Methanol, and Propane

Optical Investigation of Spray Characteristics for Light Fuel Oil, Kerosene, Hexane, Methanol, and Propane

Time-resolved droplet size and velocity distributions in a dilute region of a high-pressure pulsed diesel spray

Effects of injector valve movement on diesel spray characteristics under short full valve opening

Contact Info

Product

Resources

About