Effects of transition on the near-field unsteady flows and far-field noise past a three-element wing

IF 5 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-05-20 DOI:10.1016/j.ast.2025.110353

Shihe Jia, Zhixiang Xiao

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引用次数: 0

Abstract

The laminar–turbulent transition has an important effect on the near-field flows past high-lift devices, but its effects on the far-field noise are not fully clear. To explore the influence of the transition on both flows and noise, the improved delayed detached eddy simulation (IDDES) method based on the k-ω-γ transition model (Tr-IDDES) is applied to simulate the flows past a finite-span wing with the multi-element foil of 30P30N, while the Ffowcs Williams and Hawkings (FW-H) equation is solved to obtain the acoustic properties. Moreover, the data from the available measurements and IDDES based on the full turbulent model (FT-IDDES) are compared. First, the Tr-IDDES method is validated by simulating the near-field unsteady flow past the 30P30N foil at a Reynolds number of 9.0 × 10⁶ through a comparison of velocity profiles at several streamwise sections. Tr-IDDES performs much better than FT-IDDES. The unsteady flows and noise past the same configuration at a Reynolds number of 1.7 × 10⁶ are then simulated using Tr-IDDES and FT-IDDES. The instantaneous flow structures, mean pressure and velocity profiles, pressure fluctuations and far-field noise are compared and analysed with and without transition effects. The slat noise predicted by Tr-IDDES is close to that by FT-IDDES, but the main wing noise is lower than that by FT-IDDES, resulting in lower total far-field noise.

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转捩对三元机翼近场非定常流场及远场噪声的影响

层流-湍流过渡对高升力装置的近场流动有重要影响，但对远场噪声的影响尚不完全清楚。为了探索过渡对流动和噪声的影响，采用基于k-ω-γ过渡模型的改进延迟分离涡模拟（IDDES）方法（r-IDDES）模拟了30P30N多单元翼型有限跨机翼的流动，并求解了Ffowcs Williams and hawkins （FW-H）方程，得到了声学特性。并将实测数据与基于全湍流模型（FT-IDDES）的IDDES数据进行了比较。首先，通过模拟雷诺数为9.0 × 106的30P30N箔片近场非定常流场，对比多个流向段的速度分布，验证了Tr-IDDES方法的有效性。tri - iddes的性能比FT-IDDES好得多。然后利用Tr-IDDES和FT-IDDES模拟了雷诺数为1.7 × 106的非定常流场和噪声。比较和分析了有和没有过渡效应时的瞬时流动结构、平均压力和速度分布、压力波动和远场噪声。tri - iddes预测的板条噪声与FT-IDDES预测的板条噪声接近，但主翼噪声低于FT-IDDES预测的主翼噪声，导致总远场噪声较低。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.