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截污管道内衬修复工程中螺旋缠绕法环形间隙填充注浆的质量控制 被引量:4
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作者 赵志宾 蒋景生 +3 位作者 王利强 张培军 夏兵兵 安明勇 《天津科技》 2022年第5期44-46,50,共4页
九江十里河DN2200管道修复工程是九江市十里河流域水环境治理工程攻坚项目,是实现十里河流域长治久清、水质提升的关键。对于该管径,机械制螺旋缠绕法(钢塑加强型)以其强度高、可带水作业等优点得到了业主和设计单位的认可。由于相邻检... 九江十里河DN2200管道修复工程是九江市十里河流域水环境治理工程攻坚项目,是实现十里河流域长治久清、水质提升的关键。对于该管径,机械制螺旋缠绕法(钢塑加强型)以其强度高、可带水作业等优点得到了业主和设计单位的认可。由于相邻检查井之间的距离很长,如何保证注浆充满度以及修复后管道线性平顺是该项目修复的难点之一。重点阐述了预埋注浆管、管内压水等方法以满足注浆充满度和管道修复后线性平顺的工程设计要求。 展开更多
关键词 钢塑加强型 填充注浆 预埋注浆管 管内压水
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Experimental study of heat transfer of ultra-supercritical pressure water in vertical upward internally ribbed tube 被引量:2
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作者 王为术 Chen Tingkuan +2 位作者 Luo Yushan  Gu Hongfang Yin Fei 《High Technology Letters》 EI CAS 2007年第1期17-22,共6页
Under ultra-supercritical pressure, the heat transfer characteristics of water in vertical upward 4- head internally ribbed tubes with a diameter of 28.65mm and thickness of 8mm were experimentally studied. The experi... Under ultra-supercritical pressure, the heat transfer characteristics of water in vertical upward 4- head internally ribbed tubes with a diameter of 28.65mm and thickness of 8mm were experimentally studied. The experiments were performed at P = 25- 34MPa, G = 450- 1800kg/(m^2·s) and q = 200 600kW/m^2. The results show that the pressure has only a moderate effect on the heat transfer of uhra-supercritical water when the water temperature is below the pseudocritical point. Sharp rise of the wall temperature near the pesudocritical region occurs earlier at a higher pressure. Increasing the mass velocity improves the heat transfer with a much stronger effect below the pesudocritical point than that above the pesudocritical point. For given pressure and mass velocity, the inner wall heat flux also shows a significant effect on the inner wall temperature, with a higher inner wall heat flux leading to a higher inner wall temperature. Increasing of inner wall heat flux leads to an early occurrence of sharp rise of the wall temperature. Correlations of heat transfer coefficients are also presented for vertical upward internally ribbed tubes. 展开更多
关键词 heat transfer supercritieal ultra-supereritieal vertical upward internally fibbed tube
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