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Experimental and Simulation Study on Gas Explosion in Confined Pipe

Siti Zubaidah, Sulaiman and R. M., Kasmani and A., Mustafa and Miss Hasimawaty, Mat Kiah (2015) Experimental and Simulation Study on Gas Explosion in Confined Pipe. In: The International Conference on Fluids and Chemical Engineering (FLUIDSCHE 2015), 25-27 November 2015 , Langkawi, Kedah. pp. 1-13.. (Unpublished)

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Experimental tests on hydrogen-enriched methane were simulated using numerical CFD tool FLACs. In this work, hydrogen concentration ranges between 4 to 8 % v/v was mixed with methane/air to observe the characteristic of flame speed and maximum pressure profile during the gas explosion. Experimental work was carried out in a closed pipe containing 90 degree bends with a volume of 0.41 m3 which operates at ambient conditions. From the experiment observation, adding hydrogen into methane-air mixture, the pressure is approximately 2 times higher and flame speed in a factor of 2 to 25 compared with pure methane-air gas explosion. Results also show that FLA Cs is under-predicted the flame speed and mass burning rate when low hydrogen concentration diffused in methane-air. This is due to low hydrogen content in methane-air mixture which limits the hydrogen diffusivity yet reducing the burning rate. It also observed that the presence of 90 degree bend in closed pipe system influences the explosion severity to the factor of 2-3 using simulation, as compared to the experimental done. There are significant discrepancies between experimental and simulation, however, the results seem conservative in general.

Item Type: Conference or Workshop Item (Speech)
Uncontrolled Keywords: 90° Bend, closed pipe, flame speed, maximum pressure, rate of pressure rise, hydrogen enrichment
Subjects: T Technology > TP Chemical technology
Faculty/Division: Faculty of Chemical & Natural Resources Engineering
Depositing User: Mrs. Neng Sury Sulaiman
Date Deposited: 11 Jan 2017 01:11
Last Modified: 29 Mar 2017 02:43
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