A turbofan engine complete machine noise test data separation method

• Main Authors: WANG LIANGFENG, QIAO WEIYANG, LIN JIAJIA, ZHANG DANLING
• Format: Patent
• Language: Chinese; English
• Published: 26.04.2019
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; PHYSICS

The invention provides a turbofan engine complete machine noise test data separation method. The method comprises the steps that the total noise spectrum and the directional characteristic of an engine are measured; According to the design parameters and the working parameters of the engine, calculating a noise spectrum of an engine component by utilizing an engine noise prediction model; Fittingthe total noise spectrum of the engine according to the noise spectrum of the engine component; Judging whether the fitted total noise spectrum is matched with the measured total noise spectrum or not; And if the fitted total noise spectrum coincides with the measured total noise spectrum, taking the predicted spectrum of the engine component as a separated spectrum. 本申请提供了一种涡扇发动机整机噪声试验数据分离方法，包括：测量发动机的总噪声频谱以及指向特性；根据发动机的设计参数和工作参数，利用发动机噪声预测模型计算发动机部件的噪声频谱；根据发动机部件的噪声频谱拟合发动机的总噪声频谱；判断拟合后的总噪声频谱和测量得到的总噪声频谱是否吻合；若拟合后的总噪声频谱和测量得到的总噪声频谱吻合，则将预测得到的发动机部件的频谱作为分离后的频谱。