基于正交实验的七孔探针结构优化设计

Structure optimization design of seven-hole probe based onorthogonal experiment

七孔探针是整个七孔探针压力测速系统的核心部件。为得到准确有效的压力数据,需要对七孔探针做进一步的优化设计。七孔探针结构影响系统感受误差的方面是多要素多水平的,选择其中三个对静压感测精度敏感的结构,结合正交实验,采用计算流体力学(CFD)方法分析和模拟大气流场。结果表明:探头直径和静压孔位置是影响探头测量的主要因素,静压孔直径是次要因素,探头直径和静压孔位置对静压感测精度的影响更为显著,并结合常用的七孔探针结构参数设计出了结构最优的七孔探针。

The seven-hole probe is the core component of the entire seven-hole probe pressure measurement system.In order to obtain accurate and effective pressure data,it is necessary to further optimize the design of the seven-hole probe.The influence of the structure of seven hole probe on the sensing error of the system is multi-element and multi-level.Three of the seven-hole probe structures are selected to analyze and simulate the atmospheric flow field with the method of computational fluid dynamics(CFD).The results show that the probe diameter and static pressure hole position are the main factors affecting the probe measurement,the static pressure hole diameter is the secondary factor,the probe diameter and the static pressure hole position have more significant influence on the static pressure sensing accuracy.Combined with the commonly used seven-hole probe structure parameters,the seven-hole probe with the best structure is designed.