论文标题
几何参数对杆式仿形配置产生的噪声的影响
Effect of geometric parameters on the noise generated by rod-airfoil configuration
论文作者
论文摘要
本文研究了使用实验和数值技术通过杆状气体配置产生的噪声，研究了几何参数 - 杆直径以及杆和机翼之间的距离的影响。使用较低散射的上风方案和延迟型涡流模拟（DDES）方法进行数值模拟，并使用剪切层适应（SLA）子网格长度尺度（SGS），以更快地之间的过渡和LES之间的过渡。遵循双重阶梯策略，导致时空的二阶精度。 FFOWCS-WILLIAMS和HAWKINGS（FWH）技术用于后处理压力波动，以预测远处的田间声学。相应的详细实验分析，使用Cottbus的勃兰登堡技术大学航空风隧道中的分阶段麦克风阵列技术进行了验证数值方法。分析的主要目的是检查配置参数对噪声产生的影响。结果表明，与实验数据有关远场声学的合理一致。
This paper investigates the effect of the geometric parameters -- rod diameter and the distance between the rod and the airfoil -- on the noise generated by rod-airfoil configuration using experimental and numerical techniques. The numerical simulations are carried out using the low-dissipation up-wind scheme and the Delayed-Detached-Eddy Simulation (DDES) approach with Shear-Layer Adapted (SLA) sub-grid length scale (SGS) for a faster transition between RANS and LES. A dual-time stepping strategy, leading to second-order accuracy in space and time, is followed. The Ffowcs-Williams and Hawkings (FWH) technique is used to post-process the pressure fluctuations to predict the far~field acoustics. A corresponding detailed experimental analysis, carried out using phased microphone array techniques in the aeroacoustic wind tunnel at the Brandenburg Technical University at Cottbus, is used for the validation of the numerical method. The key objective of the analysis is to examine the influence of the parameters of the configuration on the noise generation. The results show reasonable agreement with the experimental data in terms of far-field acoustics.
