孔板后台阶流动与钝化诊断中测压位置寻优
发布时间：2018-08-31 09:25
【摘要】：针对孔板下游流场的后台阶流动问题进行了仿真研究,可知当雷诺数大于10,000后,其旋涡回流区长度固定,并且由仿真实验可以得到回流区长度数据.对于因孔板迎流面直角边磨损钝化造成的畸变流场,可用差压比值算法进行流场畸变量即钝化量诊断与测量值校正,但测压点位置寻优的实验方法采用凑试法,效率低、不具有通用性,故将旋涡稳定性用于测压点位置寻优研究中,得到了诊断算法测压点优化经验数据,实验证明其提高了寻优效率并具有通用性,同时也适用于其他类似情况.
[Abstract]:Based on the simulation of the backward step flow in the downstream flow field of the orifice plate, it is known that when the Reynolds number is greater than 10000, the length of the vortex reflux region is fixed, and the length data of the backflow region can be obtained by the simulation experiment. For the distorted flow field caused by the right edge wear and passivation of the orifice face, the differential pressure ratio algorithm can be used to diagnose and correct the flow field distortion, that is, the passivation quantity, but the experimental method of optimizing the position of the pressure measuring point is used to find the optimum position of the pressure point, and the efficiency is low. Therefore, the vortex stability is used in the research of position optimization of pressure measuring points, and the empirical data of pressure point optimization of diagnostic algorithm are obtained. The experimental results show that the optimization efficiency is improved and universal, and it is also suitable for other similar cases.
【作者单位】： 天津大学电气与自动化工程学院;
【基金】：国家高技术研究发展计划(863计划)资助项目(2007AA04Z180) 国家自然科学基金资助项目(60974118)
【分类号】：O35
本文编号：2214574
[Abstract]:Based on the simulation of the backward step flow in the downstream flow field of the orifice plate, it is known that when the Reynolds number is greater than 10000, the length of the vortex reflux region is fixed, and the length data of the backflow region can be obtained by the simulation experiment. For the distorted flow field caused by the right edge wear and passivation of the orifice face, the differential pressure ratio algorithm can be used to diagnose and correct the flow field distortion, that is, the passivation quantity, but the experimental method of optimizing the position of the pressure measuring point is used to find the optimum position of the pressure point, and the efficiency is low. Therefore, the vortex stability is used in the research of position optimization of pressure measuring points, and the empirical data of pressure point optimization of diagnostic algorithm are obtained. The experimental results show that the optimization efficiency is improved and universal, and it is also suitable for other similar cases.
【作者单位】： 天津大学电气与自动化工程学院;
【基金】：国家高技术研究发展计划(863计划)资助项目(2007AA04Z180) 国家自然科学基金资助项目(60974118)
【分类号】：O35
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