CFD analysis of combustion characteristics of CI engine run on biodiesel under various compression ratios

Rajeesh, S.; Methre, Jaikumar; Godiganur, Sharanappa

doi:10.1016/j.matpr.2021.04.193

Cited by 2 publications

(3 citation statements)

References 18 publications

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“…Figure 6 displays the in-cylinder pressure verification. In overall, simulated results seem to be in good agreement with experimental results at most points Rajeesh et al [19].…”

Section: Validation Modelsupporting

confidence: 82%

“…Comparisons have been made at 1500 rpm speed, a temperature of 300K, and using biodiesel fuel as an alternative to diesel fuel. The cylinder pressure obtained from the numerical analysis has been confirmed by the experimental results of Rajeesh et al [19]. Figure 6 displays the in-cylinder pressure verification.…”

Section: Validation Modelsupporting

confidence: 76%

“…A single-cylinder combustion chamber model was created and simulated for verification. A numerical model of a 3D combustion chamber has been compared with the experimental model of Rajeesh et al [19]. Comparisons have been made at 1500 rpm speed, a temperature of 300K, and using biodiesel fuel as an alternative to diesel fuel.…”

Section: Validation Modelmentioning

confidence: 99%

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Impacts of Varied Injection Timing on Emission Levels, Combustion Efficiency, and Performance of Biodiesel Engines

Mahmood,

Attia,

Al-Sulttani

et al. 2023

MMEP

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Numerous studies have aimed to optimize fuel economy and minimize pollutants during the transition from diesel to biodiesel engines. However, a conspicuous void in these studies is the determination of optimal injection timing for biodiesel fuel. This oversight can culminate in escalated emission levels, increased brake-specific fuel consumption, and potential engine knocking. The present study seeks to address this gap by examining the combustion efficiency of biodiesel engines under six distinct fuel injection timings (320, 325, 330, 335, 340, and 345). Biodiesel fuel combustion was simulated using the ANSYS FLUENT software, with numerical simulations performed on the AV1 (Kirloskar) diesel engine operating at an engine speed of 1500 rpm, utilizing biodiesel as a diesel fuel substitute. The simulation results revealed that advancing the start of fuel injection augments the combustion characteristics of the biodiesel engine. Conversely, retarding the start of fuel injection resulted in a decrease in both the NOx and CO fractions. In particular, CO mass fraction values within the engine demonstrated a decrease from 0.133743891 to 0.004889395 for fuel injection timings of 40 BTC to 20 BTC respectively. Similarly, nitric oxide mass fraction levels within the engine were observed to decline from 0.015367293 to 1.13664E-34 for fuel injection timings from 40 BTC to 20 BTC respectively. These findings shed light on the pivotal role of injection timing in enhancing the performance and reducing the emission levels of biodiesel engines.

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“…Figure 6 displays the in-cylinder pressure verification. In overall, simulated results seem to be in good agreement with experimental results at most points Rajeesh et al [19].…”

Section: Validation Modelsupporting

confidence: 82%

Section: Validation Modelsupporting

confidence: 76%

See 1 more Smart Citation

Impacts of Varied Injection Timing on Emission Levels, Combustion Efficiency, and Performance of Biodiesel Engines

Mahmood,

Attia,

Al-Sulttani

et al. 2023

MMEP

View full text Add to dashboard Cite

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The impact of different compression ratios on emissions, and combustion characteristics of a biodiesel engine

Mahmood,

Al-Sulttani,

Alrazen

et al. 2024

AIMSE

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The current work investigated the combustion efficiency of biodiesel engines under diverse ratios of compression (15.5, 16.5, 17.5, and 18.5) and different biodiesel fuels produced from apricot oil, papaya oil, sunflower oil, and tomato seed oil. The combustion process of the biodiesel fuel inside the engine was simulated utilizing ANSYS Fluent v16 (CFD). On AV1 diesel engines (Kirloskar), numerical simulations were conducted at 1500 rpm. The outcomes of the simulation demonstrated that increasing the compression ratio (CR) led to increased peak temperature and pressures in the combustion chamber, as well as elevated levels of CO2 and NO mass fractions and decreased CO emission values under the same biodiesel fuel type. Additionally, the findings revealed that the highest cylinder temperature was 1007.32 K and the highest cylinder pressure was 7.3 MPa, achieved by biodiesel derived from apricot oil at an 18.5% compression ratio. Meanwhile, the highest NO and CO2 mass fraction values were 0.000257524 and 0.040167679, respectively, obtained from biodiesel derived from papaya oil at an 18.5% compression ratio. This study explained that the apricot oil biodiesel engine had the highest combustion efficiency with high emissions at a compression ratio of 18:5. On the other hand, tomato seed oil biodiesel engines had low combustion performance and low emissions of NO and CO2 at a compression ratio of 15:5. The current study concluded that apricot oil biodiesel may be a suitable alternative to diesel fuel operated at a CR of 18:1.

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CFD analysis of combustion characteristics of CI engine run on biodiesel under various compression ratios

Cited by 2 publications

References 18 publications

Impacts of Varied Injection Timing on Emission Levels, Combustion Efficiency, and Performance of Biodiesel Engines

Impacts of Varied Injection Timing on Emission Levels, Combustion Efficiency, and Performance of Biodiesel Engines

The impact of different compression ratios on emissions, and combustion characteristics of a biodiesel engine

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