Study liquid length penetration results obtained with a direct acting piezo electric injector

Payri, Raúl; Bardi, Michele; Plazas, Alejandro H.

doi:10.1016/j.apenergy.2013.01.027

Cited by 66 publications

(64 citation statements)

References 37 publications

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“…On the other hand, LOL is strongly linked to the spray development and therefore an exponential equation is preferred: Equation (2). Moreover, in other works [15], [34] the same equations have been chosen to perform a similar analysis and therefore the new results obtained in the two cases can be compared. being fuel  the density of the fuel.…”

Section: Discussionmentioning

confidence: 99%

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Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Benajes

Payri

Bardi

et al. 2013

Applied Thermal Engineering

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Section: Discussionmentioning

confidence: 99%

“…The boundary conditions have been deeply characterized in [14] and a complete description of the facility is given in [15], [16].…”

Section: The Constant-pressure Flow Facilitymentioning

confidence: 99%

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Benajes

Payri

Bardi

et al. 2013

Applied Thermal Engineering

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126

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“…Therefore, a moving average technique, described in detail by Payri et al [19], is used to calculate a single time-dependent curve for the spray tip penetration. For a time instant ti, the correspondent penetration value S(ti) is computed with the linear regression S = kt + b.…”

Section: Data Averaging and Start Of Injectionmentioning

confidence: 99%

Vapor phase penetration measurements with both single and double-pass Schlieren for the same injection event

Payri

Salvador

Viera

2017

Proceedings ILASS–Europe 2017. 28th Conference on Liquid Atomization and Spray Systems

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Schlieren imaging has been adopted as a standard optical technique for the analysis of diesel sprays under engine like conditions. A single-pass Schlieren arrangement is typically used for the study of single-orifice nozzles, as vessels with multiple optical accesses regularly allow line of sight visualization. Contrarily, for multi-spray nozzles, measurements are commonly performed through a single optical access, in which case a double-pass arrangement is employed. As a consequence, the light beams pass through the test section twice, increasing the optical sensitivity of the Schlieren setup. However, the impact this has on the macroscopic spray characteristics is still unclear. The scope of this study is to analyze the differences in vapor phase penetration for the same injection event, through high-speed imaging, for both single and double-pass Schlieren configurations. Experiments were carried out with a three hole nozzle with a nominal orifice diameter of 90 µm, named Spray B from the Engine Combustion Network, using commercially available diesel fuel and in non-reactive conditions. The impact of different injection pressures and chamber densities on the spray captured by each setup was assessed. On the results, vapor phase penetration followed the expected trend found in the literature, as it increases with increasing injection pressure and decreasing chamber density. Comparing the optical setups, vapor phase penetration obtained with the double-pass arrangement was marginally higher. The deviation was observed throughout all tested conditions. Although the discrepancy was approximately constant for different injection pressures and chamber temperature, it increased with increasing density. These results highlight the importance of a proper understanding regarding the limitations of optical diagnostics, in particular for results used in calibration of computational models.

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“…Some prototypes of direct acting piezoelectric injector were presented by Delphi [6] and Continental [7]. The study on these designs was focused on the influence of voltage on fuel flow rate [3,8,9]. Payri et al [9] in their studies used a prototype injector with different rate-shaping models to evaluate the compression ignition indexes of diesel fuel.…”

Section: Introductionmentioning

confidence: 99%

“…The study on these designs was focused on the influence of voltage on fuel flow rate [3,8,9]. Payri et al [9] in their studies used a prototype injector with different rate-shaping models to evaluate the compression ignition indexes of diesel fuel. Literature studies carried out in the framework of this work have shown that the available knowledge and explanations of the injector control in the aspect of injection delay and its influence on the spray development is insufficient.…”

Section: Introductionmentioning

confidence: 99%

Transient states analysis of CI engine injectors with the use of optical methods

Skowron

Pielecha

Wisłocki

2016

IOP Conf. Ser.: Mater. Sci. Eng.

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Study liquid length penetration results obtained with a direct acting piezo electric injector

Cited by 66 publications

References 37 publications

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Experimental characterization of diesel ignition and lift-off length using a single-hole ECN injector

Vapor phase penetration measurements with both single and double-pass Schlieren for the same injection event

Transient states analysis of CI engine injectors with the use of optical methods

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