流量调节阀特性模拟及对燃气分配不均的影响分析
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摘要
采用流量调节阀可实现调压器降压及稳压功能,还能够精确调节燃气流量,有望解决燃气调压系统供气不均问题。本文应用Fluent软件对线性消音流量调节阀进行了模拟研究,获得了符合调节阀流量特性的特性曲线,针对不同开度进行了流场和流线分析,结果发现小开度是造成燃气流动不稳定的主要原因,而阀腔后部的圆柱流道结构也是造成能量和压力损失的主要原因。在此基础上,运用Aspen Plus模拟了在入口压力和流量波动时,为保证出口压力稳定的调压策略,为解决燃气输配管网系统的分配不均问题提供技术支持。
The flow control valve can be used for reducing and stabilizing pressure, but also accurately adjusting the gas flow, which is expected to solve the uneven supplyproblem at thegas regulator system.In this paper, Fluent software is used to simulate the linear silencer flow control valve,and the right flow characteristic curves of the regulating valve are obtained. Analysis offlow field and streamline are carried out for different opening degrees. It is found that the main reason for causing unstable flow is resulted from the small opening degree, and the valve cavity at the rear of the cylindrical flow channel structure is also the main cause of energy and pressure loss.Based on this, the Aspen Plus is used to simulate the pressure regulation strategy to ensure the stability of the outlet pressure when the inlet pressure and the flow fluctuate, and provide technical support to solve the problem of uneven distribution of the gas transmission and distribution network system.
The flow control valve can be used for reducing and stabilizing pressure, but also accurately adjusting the gas flow, which is expected to solve the uneven supplyproblem at thegas regulator system.In this paper, Fluent software is used to simulate the linear silencer flow control valve,and the right flow characteristic curves of the regulating valve are obtained. Analysis offlow field and streamline are carried out for different opening degrees. It is found that the main reason for causing unstable flow is resulted from the small opening degree, and the valve cavity at the rear of the cylindrical flow channel structure is also the main cause of energy and pressure loss.Based on this, the Aspen Plus is used to simulate the pressure regulation strategy to ensure the stability of the outlet pressure when the inlet pressure and the flow fluctuate, and provide technical support to solve the problem of uneven distribution of the gas transmission and distribution network system.
引文
1 JW Dear Doff.ANumberical Study of Three-dimensional Turbulent Channel Flow at Large Reynolds Number[J].Fluid Mach,1970;20:453-480
2吴石,张文平.阀门流场的数值模拟及流噪声的实验研究[J].阀门,2005;12:7-10
3袁新明,毛根海,张土乔.阀门流道流场的数值模拟及阻力特性研究[J].水利发电学报,2005;5:498-500
4李斌,沈江,孟静华.角式调节阀流量特性的数值模拟及分析[J].化工机械,2008;10:54-56
2吴石,张文平.阀门流场的数值模拟及流噪声的实验研究[J].阀门,2005;12:7-10
3袁新明,毛根海,张土乔.阀门流道流场的数值模拟及阻力特性研究[J].水利发电学报,2005;5:498-500
4李斌,沈江,孟静华.角式调节阀流量特性的数值模拟及分析[J].化工机械,2008;10:54-56