Research Papers: Fuel Combustion

Theoretical Prediction of the Effect of Blending JP-8 With Syngas on the Ignition Delay Time and Laminar Burning Speed

[+] Author and Article Information
Guangying Yu

Mechanical and Industrial
Engineering Department,
Northeastern University,
Boston, MA 02115
e-mail: yu.g@husky.neu.edu

Omid Askari

Mechanical Engineering Department,
Mississippi State University,
Starkville, MS 39762
e-mail: askari@me.msstate.edu

Hameed Metghalchi

Mechanical and Industrial
Engineering Department,
Northeastern University,
Boston, MA 02115
e-mail: metghalchi@coe.neu.edu

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received July 3, 2017; final manuscript received July 7, 2017; published online August 22, 2017. Special Editor: Reza Sheikhi.

J. Energy Resour. Technol 140(1), 012204 (Aug 22, 2017) (5 pages) Paper No: JERT-17-1327; doi: 10.1115/1.4037376 History: Received July 03, 2017; Revised July 07, 2017

A numerical study has been carried out to investigate the impact of adding syngas into JP-8 fuel. A new chemical mechanism has been assembled from existing mechanism of JP-8 and syngas and has been examined by comparing with the experimental data from literatures. The mechanism was then applied to Cantera zero-dimension constant internal energy and constant volume model and one-dimensional (1D) freely propagating flame model to calculate the ignition delay time and laminar burning speed, respectively. The simulations were carried out over a large range of temperature (700–1000 K), blending ratio (0–20% syngas), and H2/CO ratio (10/90 to 50/50). Simulation results showed that the blending syngas with JP-8 will slightly increase the ignition delay time and laminar burning speed.

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Fig. 1

Comparison of predicted ignition delay time for syngas with the experimental data of Petersen et al. [37], Davis et al. [21], and Ranzi et al. [20] mechanisms at a pressure of 20 atm, initial compostion of 7.33% H2, 9.71% CO, 1.98% CO2, 17.01% O2, and 63.97% N2

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Fig. 2

Comparison of predicted ignition delay time of JP-8 with the experimental data [9] and Ranzi mechanism [20] at equivalence ratio of ϕ=1 and initial pressure of 20 atm

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Fig. 3

Predicted ignition delay time of JP-8 and syngas mixture with different blending ratio at initial pressure of 20 atm and equivalence ratio of ϕ=1. The syngas has 10% H2 and 90% CO by volume.

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Fig. 4

Ignition delay time of 90% JP-8 with 10% syngas at equivalence ratio of  ϕ=1 and p = 20 atm

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Fig. 5

Predicted laminar burning speed of JP-8 and syngas mixture with temperature from 700 K to 900 K using present mechanism at a pressure of 10 atm and equivalence ratio of ϕ=1

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Fig. 6

Predicted laminar burning speed with different H2/COblend ratio and different pressures at temperature of Tu=900 K, 80% JP-8, and 20% syngas in volume

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Fig. 7

Laminar burning speed of different blend ratio mixtures. Syngas contains 10% H2 and 90% CO at temperature of Tu=900 K.




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