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参考北大西洋公约组织和AIAA推荐的风洞试验数据不确定度计算方法,结合激波风洞运行特点,确定激波风洞气动力试验的主要误差源,计算激波风洞B-2标模气动力测量结果的不确定度。采用改变单一变量的方法计算主要误差源对测量结果不确定度的影响程度,辨析对不确定度起主要作用的基本参数。计算结果表明:皮托压力和总压的测量结果对流场参数影响显著,皮托压力的测量结果比总压测量结果对流场参数与气动力测量结果影响更大;降低皮托压力和总压的偏离极限,有利于提高激波风洞气动力试验数据的质量。
According to the calculation method of wind tunnel test data uncertainty recommended by the North Atlantic Treaty Organization and AIAA, the main error sources of the wind tunnel aerodynamic test are determined by combining with the operation characteristics of shock wind tunnel, and the wind tunnel B-2 model Uncertainty of aerodynamic measurements. The method of changing a single variable is used to calculate the degree of influence of the main error sources on the uncertainty of the measurement results, and the basic parameters that play a major role in the uncertainty are analyzed. The calculation results show that the results of Pitot pressure and total pressure have significant effects on the flow field parameters. The results of Pitot pressure have a greater influence on the flow field parameters and aerodynamic measurements than the total pressure measurement results. The Pitot pressure and total pressure The deviation from the pressure is conducive to improving the quality of aerodynamic test data of wind tunnel.