An experimental study on the effect of plastic sheet thickness on gas explosion load profiles generated in a vented cylindrical chamber
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Many researchers have performed gas explosion experiments by enclosing a cloud of gas in a plastic sheet made of polyethylene or polypropylene. However, in most cases, the plastic sheet is used without considering the effects of its geometrical and material properties. Therefore, the generated gas explosion load profiles may vary depending on the properties of the sheet material used in the experiment. This study experimentally investigated the effect of plastic sheet thickness on the explosion overpressure of hydrogen and selected hydrocarbon gases. One-side-open (vented) cylindrical explosion chambers were manufactured, and plastic sheet thickness was varied from 0.05 to 0.3 mm. The experimental results for the explosion overpressure of hydrogen gas showed that the overpressure varied with plastic sheet thicknesses by a factor of up to 7. It was found that the explosion overpressure of explosive gases is a unique distinguishing characteristic and that it is necessary to identify the plastic sheet effect in gas explosion experiments. The results of this study suggest that thinner plastic sheets promote the formation of realistic gas cloud volumes and shapes. The study results can also be used for further structural analysis and numerical modelling of the proper of gas explosion loads with explosion overpressure profiles tailored to the circumstances of the experimental explosion.
Abstract
Many researchers have performed gas explosion experiments by enclosing a cloud of gas in a plastic sheet made of polyethylene or polypropylene. However, in most cases, the plastic sheet is used without considering the effects of its geometrical and material properties. Therefore, the generated gas explosion load profiles may vary depending on the properties of the sheet material used in the experiment. This study experimentally investigated the effect of plastic sheet thickness on the explosion overpressure of hydrogen and selected hydrocarbon gases. One-side-open (vented) cylindrical explosion chambers were manufactured, and plastic sheet thickness was varied from 0.05 to 0.3 mm. The experimental results for the explosion overpressure of hydrogen gas showed that the overpressure varied with plastic sheet thicknesses by a factor of up to 7. It was found that the explosion overpressure of explosive gases is a unique distinguishing characteristic and that it is necessary to identify the plastic sheet effect in gas explosion experiments. The results of this study suggest that thinner plastic sheets promote the formation of realistic gas cloud volumes and shapes. The study results can also be used for further structural analysis and numerical modelling of the proper of gas explosion loads with explosion overpressure profiles tailored to the circumstances of the experimental explosion.
참고문헌 (14)
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