为解决现有单相介质管道泄漏检测机理未考虑流型因素而难以适用于多相流管道的问题,开展了理论研究与试验分析。分析了不同流型对管道泄漏声波信号的影响机理,并结合多相流声波泄漏检测试验,采集了不同流型工况条件下管道泄漏前后的声...为解决现有单相介质管道泄漏检测机理未考虑流型因素而难以适用于多相流管道的问题,开展了理论研究与试验分析。分析了不同流型对管道泄漏声波信号的影响机理,并结合多相流声波泄漏检测试验,采集了不同流型工况条件下管道泄漏前后的声波信号,利用功率谱密度(Power Spectral Density,PSD)分析、概率密度函数(Probability Density Function,PDF)分析、幅频谱分析等信号处理方法分析其特征。结果表明:流型对多相流管道泄漏特征影响极大,不同的流型工况下管道流动背景噪声特征及泄漏声源特性不同。该研究为多相流管道声波泄漏检测的基础研究,可为后续开展不同流型工况下管道泄漏声波产生及传播机理研究提供理论支持。(图8,表1,参23)展开更多
When new types of hydrate chemical inhibitor （such as hydrate anti-agglomerant） are used in offshore fields, some difficulties will be encountered in the pipe transportation processing design. In view of these diffi...When new types of hydrate chemical inhibitor （such as hydrate anti-agglomerant） are used in offshore fields, some difficulties will be encountered in the pipe transportation processing design. In view of these difficulties, a horizontal flow experiment pipe loop of transparent polypropylene pipe （25.4 mm inner diameter, 20 m long） was constructed, and some experiments were conducted. The working fluids were the mixed paraffin hydrocarbons, water and condensate oil mixtures obtained from offshore oil field. Analyzing the experimental results and adopting relevant theories of liquid-solid two-phase flow, the computational method of hydrate slurry transportation in pipe was developed. For the operating conditions of a certain multiphase pipeline, by using OLGA software, this method can be used to calculate pressure drop of the multiphase flow pipelines using anti-agglomerant, which can provide support for hydrate anti-agglomerant application.展开更多
文摘为解决现有单相介质管道泄漏检测机理未考虑流型因素而难以适用于多相流管道的问题,开展了理论研究与试验分析。分析了不同流型对管道泄漏声波信号的影响机理,并结合多相流声波泄漏检测试验,采集了不同流型工况条件下管道泄漏前后的声波信号,利用功率谱密度(Power Spectral Density,PSD)分析、概率密度函数(Probability Density Function,PDF)分析、幅频谱分析等信号处理方法分析其特征。结果表明:流型对多相流管道泄漏特征影响极大,不同的流型工况下管道流动背景噪声特征及泄漏声源特性不同。该研究为多相流管道声波泄漏检测的基础研究,可为后续开展不同流型工况下管道泄漏声波产生及传播机理研究提供理论支持。(图8,表1,参23)
文摘When new types of hydrate chemical inhibitor （such as hydrate anti-agglomerant） are used in offshore fields, some difficulties will be encountered in the pipe transportation processing design. In view of these difficulties, a horizontal flow experiment pipe loop of transparent polypropylene pipe （25.4 mm inner diameter, 20 m long） was constructed, and some experiments were conducted. The working fluids were the mixed paraffin hydrocarbons, water and condensate oil mixtures obtained from offshore oil field. Analyzing the experimental results and adopting relevant theories of liquid-solid two-phase flow, the computational method of hydrate slurry transportation in pipe was developed. For the operating conditions of a certain multiphase pipeline, by using OLGA software, this method can be used to calculate pressure drop of the multiphase flow pipelines using anti-agglomerant, which can provide support for hydrate anti-agglomerant application.
