高差压调适阀中未充展两相流阻力计算.pdfVIP

清华大学学报991211 页码，1/6 清华大学学报 JOURNAL OF TSINGHUA UNIVERSITY 1999年　第39卷　第12期　VoL.39　 No.12　1999 高差压调节阀中未充展两相流阻力计算   许明阳,　王文然,　王家英，　姚建设 ，　彭顺龙 ，　王嘉淮 文　摘　迷宫式高差压调节阀为降低阀内的流体流速，采用 “反向双弯头”组 成 “曲折流道，多级降压，迷宫密封”的阀芯结构。其流道复杂，工作介质为高 温、高压下的未充展的汽水两相流，阻力计算较为困难。该文作者发展了 “等 (变)差压渐进设计法”，即将复杂流道分解为一系列的阻力环节，选择现有充展 两相流理想均匀流阻力计算模型并适当修正，计算每个阻力环节的阻力，从而得 出总压降； 随阀杆一步一步前进，根据要求的流量开度特性计算出复杂流道结 构尺寸。对复杂流道中未充展的两相流阻力计算进行了有益的尝试。实验结果表 明，理论计算值和实际测量值基本相符。 关键词　未充展两相流； 高差压； 调节阀； 局部阻力 分类号　TE 345； O 359 Resistance calculation of unfully developed two -phase flow through high differential pressure regulating valves XU Mingyang, WANG Wenran, WANG Jiaying, YAO Jianshe, PENG Shunlong, WANG Jiahuai Institue of Nuclear Energy Technology, Tsinghua University, Beijing 100084, China; Oil Production Technology Research Institute, Xinjiang Petroleum Administration Bureau, Xinjiang Kelamayi 834000, China Abstract　To reduce the flow velocity in the high differential pressure regulating valve with labyrinth, A type of complicated valve core structure were designed with tortuous flow path made from reversal double elbows. It is very difficult to calculate the pressure-drop of the unfully developed two-phase flow under high temperature and pressure which flow through the valve core. A calculation method called “constant (varing) pressure-drop progressing step by step design method” was developed. The complicated flow path w