Investigation of the Atomization and Evaporation of Diesel Fuel and Heavy Fuel Sprays Using Optical Measurement Techniques

Prescher, K.; Astachow, Andrej; Krüger, Grit; Hintze, Kai

doi:10.4271/1999-01-0520

Cited by 8 publications

(3 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, optical techniques are generally agreed upon as being the best choice, since they are relatively nonintrusive. LBE (laser beam extinction), PIV (particle image velocimetry), PDI (phase Doppler interferometry), LDV (laser Doppler velocimetry) and photographic imaging [2][3][4][5][6][7][8][9] are all based upon optical techniques. Among these techniques, direct photographic imaging is particularly suitable for the quantification of the global characteristics of fuel sprays throughout the injection period.…”

Section: Introductionmentioning

confidence: 99%

Quantitative characterization of diesel sprays using digital imaging techniques

Shao¹,

Yan²,

Greeves³

et al. 2003

Meas. Sci. Technol.

View full text Add to dashboard Cite

This paper presents the application of digital imaging and image processing techniques for the quantitative characterization of diesel sprays. An optically accessible, constant volume chamber was configured to allow direct photographic imaging of diesel sprays, which were generated from a six-hole nozzle in a non-evaporating and pressurized environment. A high-resolution CCD camera and a flash light source were used to capture the images of the sprays. Dedicated image processing software has been developed to quantify a set of macroscopic, characteristic parameters of the sprays including tip penetration, near-and far-field angles. The spray parameters produced using this software are compared with those obtained using manual methods. The results obtained under typical spray conditions demonstrate that the software is capable of producing more accurate, consistent and efficient results than the manual methods. An application of the imaging processing software to the characterization of diesel sprays for a valve covered orifice nozzle is also presented and discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Quantitative characterization of diesel sprays using digital imaging techniques

Shao¹,

Yan²,

Greeves³

et al. 2003

Meas. Sci. Technol.

View full text Add to dashboard Cite

show abstract

“…The turbulent motion is enhanced and increases the speed of radial expansion of the oil beam. 22 As can be seen in Figure 10, the spray projected area increases rapidly with time, first along with the linearity, reaches the maximum value at about 0.03 ms, and gradually decreases. The growth curve of the spray projection area is different from that of the spray tip penetration force and spray cone angle, which indicates that the spray projection area results from the combined effect of the spray tip penetration force and spray cone angle.…”

Section: Effect Of Injection Pressure On Fuel Spray Characteristics F...mentioning

confidence: 76%

“…The flow speed of fuel in the spray hole is increasing. The turbulent motion is enhanced and increases the speed of radial expansion of the oil beam …”

Section: Resultsmentioning

confidence: 99%

Effect of Fuel Physicochemical Properties on Spray and Particulate Emissions

et al. 2022

View full text Add to dashboard Cite

To investigate the effect of fuel physicochemical properties on spray and particulate emissions, fuel spray characteristics were tested on a constant volume chamber (CVC) test rig using a high-speed camera method to investigate the effect of different injection and ambient pressures on spray characteristics. In the engine bench tests, the effects of particulate emissions from five different diesel fuels with different physicochemical properties were analyzed under low-, medium-, and high-load steady-state conditions and 5 s transient loading conditions. The test results showed that the spray tip penetration of different CNs results from the combined effect of the fuel properties. The spray cone angle of the five fuels increased with the increase of injection and ambient pressure, and the impact of ambient pressure on the spray cone angle was more prominent. Spray tip penetration and spray projection area increase with increased injection pressure and decrease with increased ambient pressure; compared with spray tip penetration, the spray cone angle has more influence on spray projection area, especially near-field spray cone angle as the primary influence factor. Fuels with different ignition characteristics have other effects on particulates at different loads. At low loads, choosing CN = 55.3 fuel improved the number and mass of particulates; at medium and high loads, choosing CN = 51 fuel reduced the number of particulate emissions. Fuels with different volatilities have different effects on particulates at other loads. At low loads, CN = 54.9 fuel was chosen with moderate volatility and aromatic content. At medium and high loads, the volatility of the fuel had a lower weight on particulates, and the aromatic content had a higher weight. Under the transient loading condition of 5 s, using fuel with a higher CN, good volatility, and lower aromatic content can appropriately reduce the number of particulate emissions.

show abstract