diagnosis technique of boundary layer
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摘要: 给出了对二元翼型模型和三元三角翼模型表面边界层转捩用表面热膜技术、红外热像仪技术和液晶显示技术在同一风洞中同时进行显示和测量并进行比较的结果。对二元NACA-0012翼型表面边界层转捩点位置测量,三种方法都给出了相吻合的结果。三元的60°三角翼模型经过多次实验,测量结果表明:表面热膜技术能够给出三角翼模型表面边界层转捩位置的定量侧量结果。红外热像仪技术和液晶显示技术研究在应用时受到环境条件的影响,在合适的条件下也能给出模型表面边界层转捩位置的定量结果。Abstract: This paper gives visualising and measuring results of the surface boundary layer transitions for two dimensional airfoil and three dimensional delta wing models using the surface hot film (HF) technique, the infrared image technique (IIT) and the liquid crystal technique (LCT) in same wind tunnel. The results detected the surface boundary layer transition positions by three techniques were excellent identical for two dimensional NACA-0012 airfoil model. The results detected for three dimensional 60°delta wing model showed that the surface hot film technique can give quantitative information of the surface boundary layer transition positions, both the infrared image and the liquid crystal techniques as using were affected by environmental conditions.At appropriate conditions they can also give quantitative information of the surface boundary layer transition position.
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