壁压法在低速闭口回流式风洞中的应用

本文介绍了由Hackett提出的一种估算大攻角洞壁干扰修正的壁压信息法。并利用四个几何相似、尺寸不同的平板机翼和翼-身组合体模型在南航NH-2风洞中进行了试验。试验和计算结果表明,该方法使用方便,修正结果准确可靠。但必须指出,对于试验段下游带有平衡缝的闭口回流风洞,洞壁测压数据需经适当的修正才能获得满意的结果。

THE APPLICATION OF WALL PRESSURE METHOD IN LOW SPEED RETURN WIND TUNNEL WITH CLOSED JET

A wall pressure signature method presented by Hackett has been introduced in order to estimate the wind tunnel corrections at high angles of attack. The tests of four flat plate wing and wing-body models of similar geometry with various sizes have been completed in NH-2 wind tunnel of Nanjing Aeronautical Institute. The results of test and calculation showed that the present method is convenient to use and the results corrected are accurate and reliable. But it is necessary to point out that the satisfactory results can be obtained only the static pressure obtained from measurement at the surface of wall be corrected properly for closed jet and return wind tunnel with the breather slot aft the jet.