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大口径蝶阀数学建模与流场特性分析

Modeling and flow field analysis of large-diameter butterfly valve
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摘要 为了获得大口径蝶阀的输入输出特性模型,开展了蝶阀运动特性实验和数值模拟仿真研究。在给定工况下,计算蝶阀在不同开度下的速度、压力、力矩和压降,获取了蝶阀内部流场特性;同时,根据流速分布、压力分布、湍流动能和湍流强度等表征蝶阀流动特性的参数,通过拟合建立了蝶阀特性数学模型,并与实验数据进行了对比分析。结果表明:不同开度时,蝶阀呈现不同的流场特性,当开度大于等于53.65%时,蝶阀流体在入口和出口处的流速较饱满,流通性能相对较好,流态平稳。经实验数据修正后的蝶阀数学模型置信度高,利用它进行蝶阀运动特性数值模拟分析是可行性的。 The motion characteristics and numerical simulation method were developed to obtain input-output characteristics of a large-diameter butterfly valve. Under given operating conditions, velocity, pressure, torque and pressure drop were calculated to obtain the flow field of butterfly valve. Then, using some characteristic parameters such as velocity profile, pressure distribution, turbulence kinetic energy and turbulence intensity, the model of butterfly valve was established by fitting method and compared with experimental data. Results illustrated that flow field characteristic differed at different opening degrees, and when the opening degree was equal to or greater than 53.65%, the flow velocity of the butterfly valve fluid at the inlet and outlet was relatively full, the flow performance was relatively good and the flow state was stable. The mathematical model of butterfly valve modified by the experimental data has high degree of confidence, making it feasible to analyze the motion characteristics of butterfly valve.
作者 张松 但志宏 李腾 钱秋朦 张健平 郭玉英 ZHANG Song;DAN Zhihong;LI Teng;QIAN Qiumeng;ZHANG Jianping;GUO Yuying(Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Mianyang Sichuan 621703,China;Science and Technology on Altitude Simulation Laboratory,Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Mianyang Sichuan 621703,China;Production Department Product Project Office,Aero Engine Corporation of China,Beijing 100097,China;School of Manufacturing Science and Engineering,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;School of Information Engineering,Southwest University of Science and Technology,Mianyang Sichuan 621010,China)
出处 《航空动力学报》 EI CAS CSCD 北大核心 2020年第6期1315-1325,共11页 Journal of Aerospace Power
基金 航空发动机高空模拟技术科技重点实验室创新基金(18zd9101)。
关键词 大口径蝶阀 蝶阀数学模型 流场特性 运动特性 开度 large-diameter butterfly valve model of butterfly valve flow field characteristics motion characteristics the opening
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