Effect of a dual air inlet port of the 4-valve CI engine on the swirl flow generated at the bottom region of the cylinder using the PIV technique

Aljarf, Saad; Singh, Hardeep; Ndizeye, Gerard; Ichiyanagi, Mitsuhisa; Suzuki, Takashi

doi:10.1299/mej.20-00392

Cited by 4 publications

(4 citation statements)

References 10 publications

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“…Their study also focused only on the compression stroke, where the eccentricity of the swirl center also caused in-cylinder flow to be asymmetric, which lowered the swirl ratio. In our previous studies, we measured the flow velocity inside cylinders when changing the engine speed and the opening area of helical ports under both the motored-and the fired-engine conditions [14,15,34,35]. We found that by changing the helical port's opening areas, SCPs do not shift significantly, and airflow velocities do not change with an increase in engine speed.…”

Section: Introductionmentioning

confidence: 92%

“…Figure 1 illustrates the experimental apparatus based on the optical single cylinder diesel engine, and Table 1 provides the specification of the PIV system, which was similar to our previous studies [14,15,34,35].…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…Figure 1 illustrates the experimental apparatus based on the optical single cylin diesel engine, and Table 1 provides the specification of the PIV system, which was sim to our previous studies [14,15,34,35]. An optical four-valve engine with two intake ports and two exhaust ports was used during the PIV experiments.…”

Section: Experimental Apparatusmentioning

confidence: 99%

“…In [8], it was shown that higher heat transfer was a consequence of increasing the swirl ratio, which enhanced the power performance by 5.79% and improved the fuel consumption as well. Furthermore, the influences of the following factors on swirl flows inside cylinders were investigated: the shape of the piston bowl [9][10][11], the shapes and configurations of intake ports [12][13][14][15], the volume flow rates of air from the intake ports [16][17][18][19][20], and so forth.…”

Section: Introductionmentioning

confidence: 99%

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Experimental Investigation of the In-Cylinder Flow of a Compression Ignition Optical Engine for Different Tangential Port Opening Areas

Ichiyanagi,

Yilmaz,

Hamada

et al. 2023

Energies

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The push for decarbonization of internal combustion engines (ICEs) has spurred interest in alternative fuels, such as hydrogen and ammonia. To optimize combustion efficiency and reduce emissions, a closer look at the intake system and in-cylinder flows is crucial, especially when a hard-to-burn fuel, such as ammonia is utilized. In port fuel injection ICEs, airflow within cylinders profoundly affects combustion and emissions by influencing the air–fuel mixing phenomenon. Adjusting intake port openings is an important factor in controlling the in-cylinder airflow. In previous experiments with a transparent cylinder, tangential and helical ports demonstrated that varying the helical port’s opening significantly impacts flow velocities, swirl ratios, and swirl center positions (SCPs). In this study, we used a particle image velocimetry technique to investigate how the tangential port’s opening affects intake and in-cylinder flows. Flow velocities were assessed at different planes near the cylinder head, evaluating streamline maps, turbulent kinetic energy (TKE), and SCPs. Under the given experimental conditions, swirl flows were successfully generated early in the compression stroke when the tangential port opening exceeded 25%. Our findings emphasize the importance of minimizing TKE and SCP variation for successful swirl flow generation in engine cylinders equipped with both tangential and helical ports.

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Section: Introductionmentioning

confidence: 92%