Wall Heat Flux on Impinging Diesel Spray Flame: Effect of Hole Size and Rail Pressure at Similar Injection Rate Condition

Mahmud, Rizal; Kurisu, Toru; Ilminnafik, Nasrul; Nishida, Keiya; Ogata, Yoichi

doi:10.4271/2020-32-2313

Cited by 3 publications

(3 citation statements)

References 15 publications

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“…The decrease of velocity of spray affects the decrease in the momentum of the fuel to the air so that the homogeneity of the air and fuel blend decreases [21], [23][24]. Spray tip penetrations are almost the same as each other, meaning that the velocity of spray and the momentum of the fuel are the same [30]. It needs a combination of treatment between the chamber condition and fuel composition so that the momentum, spray angle, and spray tip penetration remain high so that the homogeneity of the fuel and air mixture could be better.…”

Section: Velocity Fo Spraymentioning

confidence: 99%

Spray Characteristics at Preheating Temperatur of Diesel-Biodiesel-Gasoline Fuel Blend

Arifin

Ilminnafik²,

Kustanto³

et al. 2021

JMEST

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Technological developments in diesel engines require improvements to the fuel injection system to meet the criteria for economical, high-power and efficient combustion and meet environmental regulatory standards. One method that has a lot of interest is changing the characteristics of the fuel, with the aim of producing optimal combustion. Spray characteristics have a big role in determining the quality of combustion in diesel engines. A good spray can improve the quality of fuel atomization and the homogeneity of the air-fuel mixture in the combustion chamber so that it can produce good engine performance and low emissions. This study aims to determine the effect of a diesel-biodiesel (Calophyllum inophyllum)-gasoline blendandfuel heating on the spray characteristics. The research was conducted with variations in composition (B0, B100, B30, B30G5 and B30G10) and fuel heating (40, 60, 80, and 100 °C). Fuel injected atapressure of 17 MPa in to a pressure chamber of 3 bar. The spray formed was recorded with a high-speed camera of 480 fps (resolution 224x168 pixel). In B100 biodiesel, the highest viscosity and density cause high spray tip penetration, small spray angle, and high spray velocity. The addition of diesel oil, gasoline, and heating fuel reduces the viscosity and density so that the spray tip penetration decreases, the spray angle increases and the velocity of spray decreases.

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Section: Velocity Fo Spraymentioning

confidence: 99%

Spray Characteristics at Preheating Temperatur of Diesel-Biodiesel-Gasoline Fuel Blend

Arifin

Ilminnafik²,

Kustanto³

et al. 2021

JMEST

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“…Ethanol can also withstand the combustion process at higher temperatures and pressures than gasoline, allowing an increase in the compression ratio of the sparkignition engine [4]. The changing of ignition temperature in the combustion chamber must also be accompanied by adjustments to the type of spark plug, spray flame, ignition timing, and cooling of the combustion chamber to avoid incomplete combustion and knocking processes [5,6].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Spark Plug Ground Electrode on Spark Ignition Engine Performance

Lillahulhaq

Mahmud

Safiullah

2022

JRM

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Motorcycle performance is influenced by many factors, including combustion chamber dimension, fuel characteristic, type of spark plug, spray flame, ignition timing, and the combustion chamber's cooling system to avoid incomplete combustion and knocking processes. The spark plug is an essential component of SIE. Several studies, such as spark plug gap, material type, multiple-ground Electrode, roughness, etc., have been conducted to examine the effect of spark plug modifications on the combustion process. Some previous research investigates the impact of a multiple-ground electrode spark plug in biofuel combustion. However, a study about the effect of multiple-ground electrode spark plugs on the gasoline combustion process has not been conducted. This research was conducted to determine the impact of multiple-ground electrode on Supra 125 cc performance. The data displayed in this study are power, torque, BHP, and BMEP in single, double, and triple ground electrode. The results showed that the double ground electrode spark plug produced better performance than other variations.

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“…In order to elucidate the mechanism of the wall heat transfer during the diesel spray flame impingement, a series of parametric study of wall impinging diesel spray flame combining transient wall heat flux measurements and high-speed optical diagnostics was conducted detailed by authors [9][10][11]. The results indicate how various experimental conditions affect the spray/flame impingement behavior, with considerable heat loss resulting in some cases.…”

Section: Introductionmentioning

confidence: 99%

Effect of Injection Pressure on Local Temperature and Soot Emission Distribution of Flat-Wall Impinging Diesel Flame under Diesel Engine like-Condition

Mahmud¹,

Rohmawati²

2022

Diesel Engines and Biodiesel Engines Technologies

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Increasing heat transfer and heat transfer coefficient as the combined effect of impingement distance and injection pressure has been explored in the previous report. However, local temperature distribution was limited to the discussion. Clearly, investigation of near-wall temperature in the heat transfer analysis is absolutely necessary. This has a crucial effect on the local heat flux to understand the heat transfer phenomenon on the combustion chamber walls. The local temperature and KL factor were investigated by using a high-speed video camera and a two-color method by using a volume vessel with a fix-impingement wall. We found that the local temperature and KL factor distribution increase in low injection pressure. This result had a dominant effect on local heat transfer.

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Wall Heat Flux on Impinging Diesel Spray Flame: Effect of Hole Size and Rail Pressure at Similar Injection Rate Condition

Cited by 3 publications

References 15 publications

Spray Characteristics at Preheating Temperatur of Diesel-Biodiesel-Gasoline Fuel Blend

Spray Characteristics at Preheating Temperatur of Diesel-Biodiesel-Gasoline Fuel Blend

The Effect of Spark Plug Ground Electrode on Spark Ignition Engine Performance

Effect of Injection Pressure on Local Temperature and Soot Emission Distribution of Flat-Wall Impinging Diesel Flame under Diesel Engine like-Condition

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