【摘要】：為計(jì)算埋地天然氣管道泄漏量,獲得合理的埋地管道泄漏計(jì)算模型與埋地管道土中天然氣吸收量,通過(guò)分析燃?xì)夤艿佬孤┑哪Ｐ蛣澐謽?biāo)準(zhǔn),建立等溫與等熵模型計(jì)算小孔泄漏量。結(jié)合天然氣管線泄漏強(qiáng)度的實(shí)驗(yàn)數(shù)據(jù)進(jìn)行對(duì)比分析,得出了等熵與等溫模型分別為實(shí)際小孔泄漏量的上下限;利用菲克定律推導(dǎo)埋地管道泄漏擴(kuò)散濃度方程,并分析擴(kuò)散范圍,結(jié)合工程實(shí)例對(duì)泄漏量進(jìn)行計(jì)算分析。研究結(jié)果表明,小孔泄漏孔徑越小,處于爆炸濃度極限的時(shí)間越長(zhǎng),危險(xiǎn)性越高。根據(jù)埋地管道周圍土中各點(diǎn)天然氣濃度分布規(guī)律,提出了土壤吸收量計(jì)算方法,改進(jìn)了地面蒸氣云泄漏質(zhì)量計(jì)算方法,結(jié)合工程實(shí)例定量地給出了土壤的天然氣吸收率。
[Abstract]:In order to calculate the leakage of buried natural gas pipeline, a reasonable calculation model of buried pipeline leakage and the amount of natural gas absorption in buried pipeline soil are obtained, and the classification standard of gas pipeline leakage model is analyzed. The Isothermal and Isentropy models were established to calculate the leakage of small pores. Combined with the experimental data of leakage intensity of natural gas pipeline, it is concluded that the Isentropy and isotherm models are the upper and lower limits of the actual leakage of small holes, respectively. The equation of leakage diffusion concentration of buried pipeline is derived by using Fick's law, and the diffusion range is analyzed, and the leakage quantity is calculated and analyzed with an engineering example. The results show that the smaller the leakage aperture of the hole is, the longer the time is at the explosion concentration limit, and the higher the risk is. According to the distribution law of natural gas concentration in the soil around the buried pipeline, the calculation method of soil absorption is put forward, the calculation method of surface vapor cloud leakage quality is improved, and the natural gas absorption rate of soil is quantitatively given with an engineering example.
【作者單位】： 解放軍理工大學(xué)爆炸沖擊防災(zāi)減災(zāi)國(guó)家重點(diǎn)實(shí)驗(yàn)室;
【基金】：國(guó)家自然科學(xué)基金資助項(xiàng)目(51478465,51308544,51508567) 江蘇省自然科學(xué)基金資助項(xiàng)目(BK20151448)
【分類號(hào)】：TE973

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本文編號(hào)：2492993