Multidimensional modeling of the effect of fuel injection pressure on temperature distribution in cylinder of a turbocharged DI diesel engine

Emami, Sajjad; Jafarmadar, Samad

doi:10.1016/j.jppr.2013.04.003

Cited by 14 publications

(7 citation statements)

References 25 publications

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“…The boundary heat transfer was modeled by giving constant temperatures to the physical boundaries and the law of the wall model. The temperatures considered for the cylinder (490 K), piston (600 K), and cylinder head (580 K) were based on the accepted practices in the published literature. ,, …”

Section: Computational Modelingmentioning

confidence: 99%

Computational Investigation of the Double-Injection Strategy on Ethanol Partially Premixed Compression Ignition

Panakarajupally

Mittal

2017

Energy Fuels

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Ethanol partially premixed compression ignition was computationally investigated to understand the effect of the injection strategy on efficiency, emissions, and noise for a heavy-duty engine having displacement of 2123 cm3 and a compression ratio of 17.3 at medium load. Computational fluid dynamics (CFD) modeling with detailed chemistry was performed using the CONVERGE CFD package for a single sector from the intake valve closure to the exhaust valve opening. A double-injection strategy was used, and the start of first injection (SOFI), start of second injection (SOSI) and percentage of mass injected in the first injection (MIFI) were varied while keeping all other parameters constant. Results show that the variation in SOFI has a non-monotonic effect on the combustion phasing and the peak pressure rise rate (PPRR), whereas SOSI can be used to control the combustion phasing. In addition, variation in MIFI is an effective way to control combustion phasing and the peak rate of pressure rise. By an optimum choice of SOFI, SOSI, and MIFI, it is possible to attain high efficiency and low PPRR and emissions. The role of the delayed combustion in the cooler squish zone in moderating the heat release rate is also highlighted.

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Section: Computational Modelingmentioning

confidence: 99%

Computational Investigation of the Double-Injection Strategy on Ethanol Partially Premixed Compression Ignition

Panakarajupally

Mittal

2017

Energy Fuels

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“…The models which are used in simulations are listed in Table 3. The heat process is described by a model originally derived by Dukowicz (1980) and Emami and Jafarmadar (2013).With the assumption of uniform droplet temperature, the rate of droplet temperature change is determined by the energy balance equation, which states that the energy conducted to the droplet either heats up the droplet or supplies heat for vaporization ( Figure 3). The standard WAVE model is used for simulating the breakup process (Reitz, 1987).…”

Section: Computational Fluid Dynamic Modelmentioning

confidence: 99%

Effects of fuel injection discharge curve and injection pressure on upgrading power and combustion parameters in heavy-duty (HD) diesel engine with computational fluid dynamics (CFD) simulation

Chamehsara¹,

Mirsalim²,

Tajdari³

2014

J. Mech. Eng. Res.

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In this study, the effects of fuel injection discharge curve and injection pressure onpower upgrade of heavy-duty diesel engine by simulation of combustion process in AVL-Fire software are discussed simultaneously. Hence, the fuel injection discharge curve is changed from semi-triangular to rectangular which is usual in common rail fuel injection system. Injection pressure with respect to amount of injected fuel and nozzle hole diameter are changed. Injection pressure is calculated by an experimental equation which is developed for heavy duty diesel engines with common rail fuel injection system. Power upgrade for 1000 and 2000 bar injection pressures are discussed. For 1000 bar injection pressure with 188 mg injected fuel and 3 mm nozzle hole diameter, power is upgraded about 19% in comparison to original state which is semi-triangular discharge curve with 139 mg injected fuel and 3 mm nozzle hole diameter, with no special change in cylinder pressure. On the other hand, both the NO X and the Soot emissions decreased about 30 and 6%, respectively. Compared with the original state, in the case of 2000 bar injection pressure, with injected fuel and nozzle diameter, 196 mg and 2.6 mm respectively, the power is upgraded about 22%, whereas cylinder pressure has been fixed, and the NO X and the Soot emissions are decreased to 36 and 20%, respectively.

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“…Also, the combustion delay time is reduced with increased IPR. Due to this, the mixture is formed in a shorter time, the amount of the nitric oxide (NOx) formed reduced considerably due to the ignition time delay [6][7][8]. Increasing IPR will remove the accumulation of particles, which results in a significant decrease in particle total mass concentration and reduces soot formation [9].…”

Section: Introductionmentioning

confidence: 99%

Influence of Ultra Injection Pressure with Dynamic Injection Timing on CRDI Engine Performance Using Simarouba Biodiesel Blends

Pai¹,

Sharief²

2018

IJAME

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A single cylinder diesel engine upgraded to operate Common Rail Direct Injection (CRDI) system and employed in this investigation. Tests were conducted on this engine using High-Speed diesel (HSD) and Simarouba biodiesel (SOME) blends to determine the influence of Injection Pressure (IP) and Injection Timing (IT) on the performance and emissions. Four unique IP of 400 bar to 1000 bar, in steps of 200 bar and four differing ITs of 10°, 13°, 15° and 18° before Top Dead Center (bTDC) combinations were attempted for the 25% to full load. Compression Ratio (CR) of 16.5 and Engine speed of 1500 RPM was kept constant during all trails. Critical performance parameter like Brake Thermal Efficiency (BTE) and Brake Specific Fuel Consumption (BSFC) were analyzed, primary emission parameters of the diesel engine The NOx and Smoke opacity were recorded. Finally, the outcomes of each combination were discussed.

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Multidimensional modeling of the effect of fuel injection pressure on temperature distribution in cylinder of a turbocharged DI diesel engine

Cited by 14 publications

References 25 publications

Computational Investigation of the Double-Injection Strategy on Ethanol Partially Premixed Compression Ignition

Computational Investigation of the Double-Injection Strategy on Ethanol Partially Premixed Compression Ignition

Effects of fuel injection discharge curve and injection pressure on upgrading power and combustion parameters in heavy-duty (HD) diesel engine with computational fluid dynamics (CFD) simulation

Influence of Ultra Injection Pressure with Dynamic Injection Timing on CRDI Engine Performance Using Simarouba Biodiesel Blends

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