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| Effects of Hydrogen Addition on Premixed Combustion Characteristics of Gasoline |
| DOI：10.13949/j.cnki.nrjgc.2022.02.002 |
| Key Words:gasoline hydrogen laminar burning velocity Markstein length flame instability |
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| Abstract:In order to study the influence of hydrogen mixing ratio and initial pressure on laminar combustion characteristics of gasoline， the premixed laminar combustion characteristics of gasoline/hydrogen mixture with an equivalent ratio of 0.7~1.6 were studied experimentally. The initial temperature was 400 K， and the initial pressure was 0.10 MPa， 0.15 MPa and 0.20 MPa， and the hydrogen mixing ratio was 0%， 5%， 25%， 50%， 75%， 100% in the constant volume combustion test system. The development process of the mixture flame was recorded by the high-speed schlieren image acquisition system， and the experimental data was analyzed and calculated. Results show that the laminar burning velocity increases with the addition of hydrogen at the same equivalence ratio. The peak value of laminar burning velocity of pure gasoline appears at the equivalence ratio of 1.2， and gradually moves to the dense mixed gas zone with the increase of hydrogen mixing ratio. At low equivalence ratio， the addition of hydrogen increases the flame instability. But it is opposite at the condition of high equivalence ratio where the addition of hydrogen changes the trend of flame instability of the mixed fuel. With the increase of the pressure， the laminar burning velocity decreases， and the flame instability increases. |
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