CAJ | 학술논문

构建X-33的1/10比例前端模型，利用计算流体力学方法求解模型前端压力分布，采用三点法对嵌入式大气数据传感系统的攻角和侧滑角进行求解，并应用最小二乘法对求解数据进行修正，然后变换测压点布局，采用相同方法进行数据处理，对不同布局下的结果进行对比和分析。结果表明，基于对称性的测压点布局适用于钝头体外型的飞行器；测压孔分布较远的布局比测压孔分布较近的布局在求解精度上具有优势，求解攻角误差在0．3°以内；非对称布局在求解攻角时，会出现修正数据与设定数据偏差不稳定现象。
구건X-33적1/10비례전단모형，이용계산류체역학방법구해모형전단압력분포，채용삼점법대감입식대기수거전감계통적공각화측활각진행구해，병응용최소이승법대구해수거진행수정，연후변환측압점포국，채용상동방법진행수거처리，대불동포국하적결과진행대비화분석。결과표명，기우대칭성적측압점포국괄용우둔두체외형적비행기；측압공분포교원적포국비측압공분포교근적포국재구해정도상구유우세，구해공각오차재0．3°이내；비대칭포국재구해공각시，회출현수정수거여설정수거편차불은정현상。
In this paper,a 1/10 scale of X-33 front-end model was built,and computational fluid dynamics ( CFD) method was used to compute the pressure distribution.The triples method was then applied to solving the angle of attack and sideslip angle.The data correction was accomplished by adopting least square method. By constructing different FASD configuration and changing the layout of the points,the different solving results were calculated.Finally the results of different layouts were compared and analyzed. The results show that,the symmetry layout of measurement points is effective for blunt body shape;the max errors of angle-of-attack is 0.3 °,the distant points layout is better than the close points layout for solution accuracy;the data instability exists in the non-symmetrical layout while solving the angle of attack.