低速壁压信息洞壁干扰修正方法两个重要的新改进

本文介绍了对美国洛克希德公司Hackett,J.E.等人研究的壁压信息洞壁干扰修正方法两个重要的新改进。建立了一个简便方法,消除了原方法必须要在模型下游测到壁压的渐近分布,才能进行准确修正的苛刻条件;建立了一个测压试验洞壁干扰的改进修正方法,使测压与测力试验的修正方法一致。文中给出了两组模型的验证结果。本文的两个新改进,消除了壁压信息法应用中的突出难关,不仅拓宽了应用,并大为提高了测力、测压试验洞壁干扰修正的准确性。

Two Important Improvements upon Wall Pressure Signature Correction Method of Low-speed Wind Tunnel

The authors have recently made two important improvements upon the wall pressure signature correction method for tunnel wall interference1], which was originated by Dr. J. E. Hackett et al., Lockheed-Georgia Co. u.s.In original method, the wall pressure measurement has to be extended into the asymptotic range downstream of tested model, in order to obtain an accurate correction. Although this method was very convenient and applicable for various models and flow conditions, such a crucial requirement limited its application or decreased the correction accuracy. Here is presented a simplified method to have removed the measurement range problem above and obtained accurate correction in any cases. 2. For the pressure tests, an improved correction method is established in this paper, resulting in the coordinated correction approach for both pressure and force tests.The results from demonstration experiments on two sets of modes are presented also in this paper. It is shown that two important improvements removed the difficulty in practical application of original method, broadened the applicable range, and increased the correction accuracy in either force or pressure tests, '