Work

Flow diagnosis of compressible vortex structures on a 65° delta-wing

Year: 2025

Type: article

Abstract: With advancements in computational fluid dynamics, high-fidelity simulations enable flow diagnostics of complex flows to identify critical local structures affecting aerodynamic performance. Based on compressible vortex-force theory, the generalized Lamb vector’s spatial distribution elucidates force generation mechanisms. This study employs the shear stress transport k - ω turbulence model within the Reynolds-averaged Navier-Stokes equations to accurately capture viscous-dominated boundary layers and shock-induced separation phenomena. Additionally, an aerodynamic computed topography is also utilized to quantify lift contrasting subsonic ( Ma ∞ = 0.4) and supersonic ( Ma ∞ = 2.0) flows: incompressible Lamb vector contributions dominate subsonic regimes, while compressibility effects characterized by the compressibility term, k ∇ ρ , prevail in supersonic regimes. The spanwise and freestream-direction components of the Lamb vector and compressibility term are quantitatively evaluated for lift. For delta wings at high angles of attack, zonal scanning decouples vortex-force contributions from separated flow regions, revealing key flow structures governing lift. The vortex-force diagnosis sheds new light on the flow control and configuration optimization.

Source: Chinese Journal of Aeronautics

DOI: 10.1016/j.cja.2025.103942

Authors: Fanrong XUE, Han LIN, Shengye WANG, Chuanzhen LIU, Shufan ZOU, Wei LIU

Institutions: National University of Defense Technology, China Academy of Aerospace Aerodynamics

Language: English

Topic: Computational Fluid Dynamics and Aerodynamics

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $2,000

Funder: National Natural Science Foundation of China