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R. Etxepare, R. Gómez & J. A. Lakarra (arg.), Beñat Oihartzabali Gorazarre - Festschrift for Bernard Oyharçabal. Donostia-San Sebastián: Gipuzkoako Foru Aldundia & UPV/EHU.

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利用相似准则和灰色关联分析相结合的方法对油气混输环道模拟试验数据进行了分析 ,建立起稳定平衡时间、总持液量与相似准则数之间的函数关系 :在液体流量不变、气体流量增加或减小的过程中 ,稳定平衡时间主要与Ngw、Re、ΔNgw和N1w有关 ;在气体流量不变、液体流量增加或减少的过程中 ,稳定平衡时间主要与Ngw、ΔN1w和N1w有关 ;影响总持液量的主要因素是Ngw、N1w、Re和Eu。以锦州 2 0 2凝析气田为例 ,利用OLGA2 0 0 0软件研究了相同条件下稳定平衡时间和总持液量的变化规律 :瞬态过程中 ,管道沿线各点压力趋于稳定的时间小于整条管道总持液量趋于稳定的时间 ,没有发现各点压力出现过增或过减的现象 ,相反出现了总持液量过增或过减的现象。验证分析结果表明 ,用本文建立的函数关系式进行预测 :稳定平衡时间与OLGA2 0 0 0软件模拟结果吻合较好 ;总持液量比现场清出的液体量大 ,比OLGA2 0 0 0软件模拟结果要小。简要分析了 3种情况下总持液量不同的原因。

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Publicado dentro de la colección «Méridiennes» (ISSN: 1950-0130)

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The expansion property of cement mortar under the attack of sulfate ions is studied by experimental and theoretical methods. First, cement mortars are fabricated with the ratio of water to cement of 0.4, 0.6, and 0.8. Secondly, the expansion of specimen immerged in sulphate solution is measured at different times. Thirdly, a theoretical model of expansion of cement mortar under sulphate erosion is suggested by virtue of represent volume element method. In this model, the damage evolution due to the interaction between delayed ettringite and cement mortar is taken into account. Finally, the numerical calculation is performed. The numerical and experimental results indicate that the model perfectly describes the expansion of the cement mortar.

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Raquel Merino Álvarez, José Miguel Santamaría, Eterio Pajares (eds.)