Laser Illuminated Photographic Studies of the Spray and Combustion Phenomena in a Small High Speed DI Diesel Engine

Rao, K. K.; Winterbone, D. E.; Clough, E.

doi:10.4271/922203

Cited by 18 publications

(2 citation statements)

References 9 publications

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“…As Figure 7 shows, the OH* intensity for an injection pressure of 200 MPa near the projected impinging point is very low; therefore, one explanation for the low integrated OH* intensity at an injection pressure of 200 MPa is that the mixture is lean and there are some regions where the mixture is not sufficiently rich to be burned. Moreover, the serious wetting effect which has been demonstrated to be a key factor for partial combustion [35][36][37] may also play a role in the low integrated OH* intensity at an injection pressure of 200 MPa; the near-wall liquid phase cannot be burned by the surrounding low-temperature flame, as Figure 7 shows.…”

Section: Different Injection Pressuresmentioning

confidence: 99%

Effect of flat-wall impingement on diesel spray combustion

Li¹,

Nishida²,

Ogata³

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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The effect of spray–flat-wall interaction on the diesel combustion characteristics in a constant-volume vessel was investigated. A flat wall was fixed perpendicular to the nozzle hole axis. Three injection pressures of 100 MPa, 150 MPa and 200 MPa and a single nozzle hole with a diameter of 0.133 mm were employed. Mie scattering was adopted to detect the spray formation process; OH* chemiluminescence and natural colour luminosity were conducted to analyse the combustion process. The two-colour method was applied to calculate the soot emissions and the temperature distribution. The results reveal that, in comparison with a free spray flame, flat-wall impingement causes diesel combustion to deteriorate when the liquid phase–wall interaction occurs; however, when an appropriate impinging distance (longer than liquid-phase penetration) is selected, combustion is observed to be enhanced. As for the impinging spray flame, when the injection pressure is increased, soot formation decreases; however, combustion is not linearly enhanced by increasing the injection pressure, and the OH* chemiluminescence intensity achieves the highest value with an injection pressure of 150 MPa.

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Section: Different Injection Pressuresmentioning

confidence: 99%

Effect of flat-wall impingement on diesel spray combustion

Li¹,

Nishida²,

Ogata³

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…High-speed imaging has a wide field of application which expands from monitoring of manufacturing processes and quality inspection in general to measurement techniques like particle velocimetry [1][2][3]. In this context a smart camera system with integrated processing capabilities is introduced for online characterization of image objects in image data streams with several 100 or several 1000 frames per second and a data bandwidth of several Gbit/s.…”

Section: Introductionmentioning

confidence: 99%

C5.3 - Imaging Sensor with Integrated Feature Extraction Using Connected Component Labeling

Klaiber¹,

Ahmed²,

Najmabadi³

et al. 2013

Proceedings SENSOR 2013

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Measurement of the flow field in a diesel engine combustion chamber after combustion by cross-correlation of high-speed photographs

Sun¹,

Yates²,

Winterbone³

1996

Experiments in Fluids

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A cellular cross-correlation technique is applied to high-speed photographs of the luminous phase of combustion in a high-speed direct-injection diesel engine. The method enables the velocity and vorticity distributions in the combustion chamber to be evaluated. The results obtained from the basic technique are refined to remove spurious results and to complete the definition of the flow field by applying data validation, interpolation, and smoothing. The velocity and vorticity fields evaluated at two swirl ratios show the way in which the basically solid body swirl motion interacts with the fuel jets in the combustion chamber. A better understanding of the post-combustion fluid motion is obtained, and this should be of help in validating CFD codes and also the design of engines.

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Laser Illuminated Photographic Studies of the Spray and Combustion Phenomena in a Small High Speed DI Diesel Engine

Cited by 18 publications

References 9 publications

Effect of flat-wall impingement on diesel spray combustion

Effect of flat-wall impingement on diesel spray combustion

C5.3 - Imaging Sensor with Integrated Feature Extraction Using Connected Component Labeling

Measurement of the flow field in a diesel engine combustion chamber after combustion by cross-correlation of high-speed photographs

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