低速风洞横向开槽壁试验段性能的研究

Research of the Perforlnance on the Transverse Slotted WalI Test Section of Low-speed Wind Tunnel

为探索减小洞壁干扰的试验方法，用环境风洞做了二维极向开槽壁试验段性能的试验研究。槽壁由等宽度薄板条在相对模型的两侧壁以零攻角等间距排放而构成，通过测量圆柱模型周向的表面压力对槽饭宽度、驻室深度、试验段长度、模型在试验段中的轴向位置等与槽壁试验段性能有关的参显做了试验研究。模型堵塞比一直到０．２５的试验结果与无干扰的参考曲线符合良好。结果表明低速横向开槽壁具有洞壁干扰小且结构简单的特点。

ln order to decrease the wall interference, the perform-ance of two-dimcnsional transverse slotted wall test section was experi-mentally investigated in environmental wind tunnel.The slotted wall con-sist of arrays of evenly spaced thin slat at zero incidence on the two bound-aries oppsito the model undcr test.The length of slotted xall test sec-tion,the sldt width,the plenum deep and the distance between the nod-el center with the entrance of slotted wall test section was experimen-tally investigatcd individually by measuring the circumferential pressureon thc surfacc of circular cylinders. The pressure distributions for theblockage up to 0.25 collapse onto or very close to appropriate referencecurves uriconfined flow conditions.It shows that the transverse slottedwall has the advuntage of self-correcting wall interference and simplestructure.