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直升机噪声预测是直升机噪声研究的主要目标之一。文章根据谐波法发展了一种能预测直升机飞越噪声的计算模型。将旋翼自由尾迹分析法所得到的旋翼和尾桨的气动载荷数据代入该模型中,分别计算直升机在悬停和前飞时的有效感觉噪声级,并对其计算结果进行分析。
Helicopter noise prediction is one of the main goals of helicopter noise research. Based on the harmonic method, the article develops a computational model that predicts helicopter overflight. The aerodynamic loading data of rotor and tail rotor obtained from rotor free wake analysis method are substituted into the model to calculate the effective sensory noise level of the helicopter in hovering and forward flight separately and the calculation results are analyzed.