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Phast 7 crack5/27/2023 The crack size was found to have a great impact on the longitudinal leakage distance, showing an increasing tendency with the crack size. From the results, the longitudinal and transverse leakage distances were estimated and analyzed for quantitative evaluation of risk area. In particular, a risk region showing such a probability of ignition was newly suggested with the concept of Lower flammable limit (LFL) of methane gas used in the present study to characterize the gas propagation and the damage area in space. The commercial code of Fluent (v.16.1) was used for three-dimensional simulation. ![]() The real scale model of underground Combined cycle power plant (CCPP) was taken for simulating gas leakage characteristics for different crack sizes such as 10 mm, 15 mm and 20 mm. ![]() We numerically investigated the influence of crack size on gas leakage characteristics in a confined space.
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