储罐重力式呼吸阀超压流固耦合动态模拟及验证
Dynamic Simulation and Verification on Overpressure Fluid-solid Coupling of Gravity Breathing Valve in Storage Tank
程龙军 1刘娟 1张红星 1孙明源1
作者信息
- 1. 化学品安全全国重点实验室,山东青岛 266104;中石化安全工程研究院有限公司,山东青岛 266104
- 折叠
摘要
呼吸阀是储罐重要的安全附件,研发并应用低超压呼吸阀是避免储罐抽瘪或胀鼓事故的关键.针对国内应用的呼吸阀大多数超压值≥40%的情况,设计了一种同轴稳流、独立双出口呼吸阀阀体结构,建立了重力式呼吸阀超压流固耦合计算模型,并对呼吸阀压力端/真空端起跳过程进行模拟计算和试验研究.结果表明:①压力端/真空端分别在0.34 s和0.41 s内完成起跳,压力阀盘起跳过程呈现为加速-线性-平缓,真空阀盘起跳过程呈现为线性-平缓;②根据模拟结果研制的样机,由于表面粗糙度较大引起气流摩擦损失增加,超压值为 10%时,压力端/真空端通气量实测平均值分别为 1 820 m3/h和 902 m3/h,与计算值误差分别为1.6%和2.6%,满足额定通气量要求.呼吸阀超压流场计算结果较为准确,可以为其他尺寸呼吸阀、紧急泄放阀的设计计算提供指导.
Abstract
Breathing valves are important safety ac-cessories for storage tanks,and the development and application of low-pressure breathing valves are key to avoiding tank collapse or swelling accidents.A coaxi-al steady flow,independent dual outlet breathing valve body structure was designed to address the situ-ation where the overpressure value of most breathing valves used in China was≥40%.A gravity breathing valve overpressure fluid solid coupling calculation model was established,and the pressure/vacuum end take-off process of the breathing valve was simulated and experimentally studied.The results showed that:①The pressure end/vacuum end completed the take-off within 0.34 s and 0.41 s respectively,and the take-off process of the pressure valve disc showed an acceleration linear gentle trend,while the take-off process of the vacuum valve disc showed a linear gen-tle trend.② The prototype developed based on simula-tion results showed that due to the large surface rough-ness,the friction loss of the airflow increased.When the overpressure value was 10%,the measured average air flow rates at the pressure end and vacuum end were 1 820 m3/h and 902 m3/h,respectively,with errors of 1.6%and 2.6%from the calculated values,meeting the requirements of the rated air flow rate.The calcula-tion results of the overpressure flow field of the breath-ing valve were relatively accurate,which can provide guidance for the design and calculation of other sizes of breathing valves and emergency relief valves.
关键词
储罐/重力式呼吸阀/超压值/流固耦合/动态模拟/试验研究Key words
storage tank/gravity breathing valve/o-verpressure value/fluid-solid coupling/dynamic sim-ulation/experimental study引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据