基于正交实验的大气静压精密测量静压管设计  

Design of static pressure tube for precision air static pressure measurement based on orthogonal test design method

作　　者：刘笃喜[1] 覃秋霞[1] 王新刚[1] 毛海龙[1] 

机构地区：[1]西北工业大学空天微纳系统教育部重点实验室,西安701172

出　　处：《仪器仪表学报》2014年第2期360-367,共8页Chinese Journal of Scientific Instrument

基　　金：航空科学基金(2011ZD53044)资助项目

摘　　要：为了设计出一套应用于空速校准的远程外置式大气静压精密测量装置的静压管,研究分析静压管的结构参数对静压感测精度的影响程度和显著性,并对静压管结构参数进行优化设计。鉴于静压管结构参数是影响静压管感受误差的重要因素且是多因素多水平的,选择其中对静压感测精度敏感的4个结构参数,采用正交实验设计方法,有效地排列各参数的水平,利用计算流体动力学(CFD)技术分析和仿真静压管大气流场。数值计算结果表明,静压管长度、静压孔直径是影响静压感测精度最主要的2个因素,结构参数最优的静压管在M a<1时,C p<0.019 8,静压感测精度高。通过现行拖锥法的静压管参数仿真和低速风洞实验验证了模型和数值计算方法的正确性和准确性,该方法对机外远程外置式静压精密测量的静压管设计具有一定参考价值。In order to design the static pressure tube of a set of remote outboard precision air static pressure measure- ment assembly used for airspeed calibration, the influence of the structural parameters of the static pressure tube on the static, pressure sensing precision is analyzed ; these structural parameters of the static pressure tube are optimized. Since the structural parameters are the important factors influencing the sensing precision amt have the features of multiple factors and multiple levels, four of the parameters are selected and sorted according to their importance based on the orthogonal test design method. In addition, the air flow field of the static pressure tube is analyzed and simulated using computational fluid dynamics （CFD） technology. The numerical calculation result shows that the length of the static pressure tube and the diameter of the static port are the most important factors influencing the sensing precision; and for the static pressure tube with optimized structural parameters, the sensing precision will be high as Cp 〈0. 019 8 when Ma 〈1. The static pressure tube parameter simulation with present trailing cone method and low-speed wind tunnel experiment verify the correctness and accuracy of the simulation model and the numerical calculation method. The proposed method can provide a reference for the static pressure tube design of remote out- board precision static pressure measurement.

关 键 词：静压管 静压精密测量 正交实验设计 参数优化设计 计算流体动力学 

分 类 号：V248.1[航空宇航科学与技术—飞行器设计]