Investigation of aero-optical effects and passive control in subsonic cavity flows

IF 5.8 1区工程技术 Q1 ENGINEERING, AEROSPACE

Aerospace Science and Technology Pub Date : 2025-09-25 DOI:10.1016/j.ast.2025.111000

Kunpeng Long , Qiang Zhang , Rongrong Xue , Jinying Li , Haotong Ma

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引用次数: 0

Abstract

This study investigates aero-optical wavefront distortions induced by open cavity flows at subsonic to transonic speeds (Mach 0.5-0.8) through combined high-frequency wind tunnel experiments and fluid-optical coupled simulations as complementary. A rectangular cavity configuration is examined under fully developed turbulent boundary layers, with and without leading-edge passive flow control devices. Time-resolved optical path difference (OPD) fields are measured at 20 kHz using a wavefront sensor, and decomposed into tilt and high-order aberrations via Zernike modal analysis. Results reveal that large-scale shear-layer oscillations dominate at lower Mach numbers, contributing primarily to tilt aberrations, while higher Mach numbers introduce compressibility-driven high-order distortions. Passive control devices, such as transverse rods and flat-top spoilers, effectively suppress coherent vortex structures, leading to significant reductions in low-order aberrations with minimal penalties in high-order modes. Spectral analysis shows strong alignment between dominant OPD frequencies and Rossiter resonance modes. Among all tested geometries, the flat-top spoiler achieves the most consistent control across Mach regimes. These findings provide insights into the flow-optics coupling mechanisms in cavity environments and inform the aerodynamic design of integrated optical systems in high-speed flight.

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亚声速腔流气动光学效应及被动控制研究

本研究通过高频风洞实验和流光耦合模拟相结合的方法，研究了亚音速到跨音速（0.5-0.8马赫）开腔流动引起的气动光波前畸变。在完全发展的湍流边界层下，研究了矩形空腔结构，有无前缘被动流动控制装置。利用波前传感器测量20 kHz时分辨光程差（OPD）场，并通过Zernike模态分析将其分解为倾斜和高阶像差。结果表明，低马赫数下大尺度剪切层振荡占主导地位，主要导致倾斜像差，而高马赫数则导致压缩驱动的高阶畸变。无源控制装置，如横杆和平顶扰流板，有效地抑制相干涡结构，导致低阶像差的显著减少，在高阶模式下最小的惩罚。频谱分析表明，OPD的主要频率和罗西特共振模式之间有很强的一致性。在所有测试的几何形状中，平顶扰流板实现了最一致的跨马赫控制。这些发现有助于深入了解空腔环境下的流光耦合机制，并为高速飞行中集成光学系统的气动设计提供信息。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.