壁压法在NH-2风洞中的应用

本文介绍了一种由Hackett在1981年提出的利用测量风洞壁面静压来进行大迎角、大堵塞洞壁干扰修正的方法,并用该方法编写了Fortran程序。对四个几何相似不同尺寸的模型,在NH-2风洞中进行了试验,试验和计算的结果表明,堵塞度从1.56％到16.7％的四个模型,其升力系数和阻力系数经洞壁干扰修正后非常接近。但必须指出,对于带平衡缝的闭口回流风洞,从壁面测量所得到的静压必须加以修正,才能成功地应用这种方法。

The Application of Wall Pressure Signature Method in NH-2 Wind Tunnel

A wall pressure signature method presented by Hackett in 1981 has been introduced in order to estimate the wind tunnel wall interference in case of high angle of attack and high blockage. The tests of four flat plate wing models of similar geometry with various sizes have been completed in NH-2 wind tunnel of Nanjing Aeronautical Institute.The test results and calculations showed that the corrected lift and drag coefficients of these wings with ratios of wing to tunnel area from 1.56% upto 16.7% are very closed. It is necessary to point out that the static pressure obtained from measurement at the surface of wall must be corrected for closed jet and return wind tunnel with the breather slot in order to apply this method successfully.