Research on Several Parameters Influencing of Surface Temperature Field in Buried Pipeline Leakage Process

摘要

Characteristics of the earth's surface temperature change in the process of buried pipeline leakage were studied. Three-dimension model was established for buried pipeline leakage in this paper, and influencing of the earth's surface temperature field in buried pipeline leakage process were studied, with the factors of ambient temperature, natural wind, buried depth, and leakage rate of fluid. The study results were summarized. First, with leakage time increasing, the lower ambient temperature is, the bigger the earth's surface temperature change is; the higher ambient temperature is, the smaller the earth's surface temperature change is; when ambient temperature exceeds 293K, the earth's surface temperature change is slow, and hot range of level effect is less. Second, under surrounding wind, the earth's surface temperature change becomes clear after 1 hour, but hot range of level effect is smaller than 0.5 m. Third, the deeper buried pipeline depth is, the less the earth's surface temperature change on pipeline leakage effect is. Fourth, with leakage rate of fluid increasing, the earth's surface temperature change is violent increasingly.