Experimental and numerical analysis of the aerodynamics and vortex interactions on multi-swept delta wings

Q2 Engineering

CEAS Aeronautical Journal Pub Date : 2023-08-26 DOI:10.1007/s13272-023-00678-7

M. Werner, M. Rein, K. Richter, S. Weiss

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引用次数: 0

Abstract

Abstract The flow field around a generic multi-swept delta wing configuration is investigated under transonic flow conditions, both experimentally and numerically. A special focus is on the analysis of vortex/vortex and vortex/shock interactions at moderate angles of attack. In the present study, the Mach number is varied between $$\textrm{Ma} = {0.50}$$ Ma = 0.50 and $$\textrm{Ma} = {1.41}$$ Ma = 1.41 and the angle of attack is varied between $$\alpha = 8^\circ$$ α = 8 ∘ and $$\alpha = 28^\circ$$ α = 28 ∘ . Numerical results are validated using experimental surface pressure data from pressure taps, as well as forces and moments based on strain gauge measurements. For selected cases, velocity field data from particle image velocimetry (PIV) measurements are available as well. Over a broad range of angle of attack and Mach number, strong vortex/vortex interactions, including vortex braiding and vortex merging, occur. The location of vortex merging is moving downstream with increasing angle of attack and increasing Mach number. Additionally, at $$\textrm{Ma} = {0.85}$$ Ma = 0.85 , vortex/shock interaction occurs above the wing. For moderate angles of attack, shock-induced vortex breakdown is observed.

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多掠三角翼气动与涡相互作用的实验与数值分析

摘要采用实验和数值方法研究了跨声速流动条件下通用多掠三角翼结构的流场。特别关注的是在中等迎角下涡/涡和涡/激波相互作用的分析。在本研究中，马赫数在$$\textrm{Ma} = {0.50}$$ Ma = 0.50和$$\textrm{Ma} = {1.41}$$ Ma = 1.41之间变化，攻角在$$\alpha = 8^\circ$$ α = 8°和$$\alpha = 28^\circ$$ α = 28°之间变化。数值结果使用来自压力水龙头的实验表面压力数据以及基于应变计测量的力和力矩进行验证。对于选定的情况，粒子图像测速(PIV)测量的速度场数据也是可用的。在较大的迎角和马赫数范围内，会发生强涡/涡相互作用，包括涡编织和涡合并。随着迎角的增大和马赫数的增大，涡合并的位置向下游移动。此外，在$$\textrm{Ma} = {0.85}$$ Ma = 0.85时，机翼上方出现了涡/激波相互作用。对于中等迎角，可以观察到激波引起的涡流击穿。

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

CEAS Aeronautical Journal Engineering-Aerospace Engineering

CiteScore

3.40

自引率

0.00%

发文量

期刊介绍： The CEAS Aeronautical Journal has been created under the umbrella of CEAS to provide an appropriate platform for excellent scientific publications submitted by scientists and engineers. The German Aerospace Center (DLR) and the European Space Agency (ESA) support the Journal.The Journal is devoted to publishing results and findings in all areas of aeronautics-related science and technology as well as reports on new developments in design and manufacturing of aircraft, rotorcraft, and unmanned aerial vehicles. Of interest are also (invited) in-depth reviews of the status of development in specific areas of relevance to aeronautics, and descriptions of the potential way forward. Typical disciplines of interest include flight physics and aerodynamics, aeroelasticity and structural mechanics, aeroacoustics, structures and materials, flight mechanics and flight control, systems, flight guidance, air traffic management, communication, navigation and surveillance, aircraft and aircraft design, rotorcraft and propulsion.The Journal publishes peer-reviewed original articles, (invited) reviews and short communications.