Investigation of combustion and emission in a DI diesel engine fueled with hydrogen-biodiesel blends

Öz

The aim of this study was to determine the availability of canola oil methyl ester as an alternative fuel in diesel engines and by adding canola oil methyl ester and hydrogen to diesel fuel. This study was carried out experimentally and numerically. The engine was studied at 2000 rpm speed and full load. The analyzes carried out in the AVL-FIRE ESE Diesel part.

In-cylinder combustion and emission analyzes were examined experimentally by adding 10% (B10) and 20% (B20) of the canola oil methyl ester to the diesel (D100) fuel. Also, hydrogen fuel by the amount of 3% and 6% of the mass were added to diesel and biodiesel mixture fuels to eliminate some disadvantages of biodiesel fuels. The obtained findings in experimental and numerical studies were similar to each other. The similarity of these results was also validated by numerical studies using hydrogen.

The boundary conditions obtained in experimental studies were determined, and the effect of hydrogen fuel on temperature, in-cylinder pressure, spray distribution and CO formation were examined numerically. In the experimental studies conducted with D100, B10 and B20 fuels, the maximum pressures in-cylinder were measured as 87 bar, 88 bar and 89.09 bar respectively. In numerical results, these values were recorded as 90.02, 90 and 93.8 bar respectively. Addition of 3% and 6% hydrogen to these three different fuel mixtures increased in-cylinder pressures and temperatures. Also, in-cylinder droplet diameters with the addition of hydrogen decreased in all test fuels. This situation led to a reduction in CO emissions.

Anahtar Kelimeler

• Diesel Engine,Hydrogen,Canola oil methyl ester,CO emission,AVL Fire

Kaynakça

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