摘要
为了准确地描述大口径蝶阀流量特性,采用数值模拟分析了压比、开度、口径和阀前静压对流量系数的影响。结果表明:开度一定时,随着压比减小,流量系数先增加后保持不变,存在临界压比。大口径蝶阀固有流量特性为近似等百分比,当压比一定时,流量系数随开度增大先快速下降,后变得缓慢。口径和阀前静压对流量系数的影响小,可以忽略不计。在此基础上,对压比、开度和口径3个因素进行了影响显著性分析,敏感性主次顺序为开度>压比>口径,压比与开度交互作用的影响显著,其中开度小于等于55°、压比大于等于0.62时,流量系数变化最为显著,蝶阀调节灵敏性好。最后获得了流量系数,通过试验验证表明流量系数值正确,最大相对误差仅为5.07%。
The flow characteristics of large diameter butterfly valves are one of the foundations for fast and steady control of air-in total pressure,air-in total temperature,and air-out static pressure in aeroengine altitude simulating test.The numerical simulation was adopted to accurately describe its flow characteristics.The influences of pressure ratio,opening angle,valve diameter,and valve upstream static pressure on flow coefficients of large diameter butterfly valves were researched.The results showed that the flow coefficients firstly increased then remained constant with decrease of pressure ratio.And it had a critical pressure ratio.The inherent flow characteristics of large diameter butterfly valves had approximately equal percentage.The flow coefficients decreased sharply at the beginning,then slowly along with the opening angle.The influences of valve diameter and valve upstream static pressure were smaller and can be ignored.On this basis,the influence significance of pressure ratio,opening angle,and valve diameter may be obtained.The primary and secondary order was opening angle>pressure ratio>valve diameter.The response surface analysis showed that there were significant interaction influences on the flow coefficients between pressure ratio and opening angle.And the flow coefficients varied dramatically when the opening angle was equal or lesser than 55°and pressure ratio was above or equal 0.62,indicating the adjustment sensitivity of the large diameter butterfly valves was good.Finally,the table on flow coefficient of large diameter butterfly valve was obtained on the basis of pressure ratio and opening angle.Using the test results,the maximum relative errors of the simulated values and the corresponding test values were 5.07%.
作者
张健平
张松
但志宏
王曦
赵彦宾
邓尧
ZHANG Jianping;ZHANG Song;DAN Zhihong;WANG Xi;ZHAO Yanbin;DENG Yao(Key Laboratory of Testing Technology for Manufacturing Process,Ministry of Education,Southwest University of Science and Technology,Mianyang Sichuan 621010,China;Sichuan Gas Turbine Establishment,Aero Engine Corporation of China,Mianyang Sichuan 621500,China;School of Energy and Power Engineering,Beihang University,Beijing 100191,China;Collaborative Innovation Center for Advanced Aero-Engine,Beijing 100191,China)
出处
《航空动力学报》
北大核心
2025年第1期403-415,共13页
Journal of Aerospace Power
基金
中国航发四川燃气涡轮研究院外委课题(21zg8112)
航空发动机高空模拟技术重点实验室稳定支持资助项目(20zh0149)。
关键词
高空模拟试车台
显著性
大口径蝶阀
流量系数
压比
开度
simulated altitude test facility
obvious difference
large-diameter butterfly valve
flow coefficient
pressure ratio
opening angle
作者简介
张健平(1978−),女,副教授、硕士生导师,博士,主要从事多尺度与多相流数值模拟及应用研究。E-mail:zjp2009@mail.ustc.edu.cn;通信作者:张松(1968−),男,研究员、硕士生导师,博士,主要从事发动机高空模拟试验控制技术研究。E-mail:goom2619@163.com。
