Computational Study of a Battle Damaged Finite Aspect Ratio Wing

Yang, Zhiyin; Samad-Suhaeb, Mujahid; Render, P. M.

doi:10.2514/6.2012-2902

Cited by 6 publications

(3 citation statements)

References 5 publications

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“…They found that flows (the weak and strong jets) through the circle hole are asymmetric and moving the damage toward the tip reduced the magnitude of lift loss and drag increase. Yang et al 3 assessed the accuracy of the Reynolds Averaged Navier-Stokes approach by carrying out a finite aspect ratio wing test and confirmed that the computational fluid dynamics (CFD) study with a turbulence model produced good results regarding identifying the flow features inside/around the damage hole. Render and Pickhaver 4 performed wind tunnel test to study the influence of hole orientation on the aerodynamics of battle-damaged wings.…”

Section: Introductionmentioning

confidence: 91%

Method for assessing combat survivability for aircraft with wing damage

Pei

Chen

Wei

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part G:

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In the combat environment, wing damage is of particular concern since the wing is the main component to generate lift which affects survivability or safety. Previous research has been mainly concentrated on the aerodynamic behavior of the aircraft with wing damage. However, the military analysts are more concerned about the specific value of survivability (measured by survival probability) so as to correctly plan combat operations. This paper proposes a method for quantitatively describing the relationship of aircraft survivability and damage holes with different sizes and different locations on the wing. Examples show that the survivability decreases with increasing hole size; the magnitude of survivability decrement reduces when moving the damage backwards or moving the damage toward the wing tip; when the effect of damage on the vulnerability is considered for different hole sizes, the survivability is reduced more significantly compared with the cases where the vulnerability is kept constant for all scenarios.

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Section: Introductionmentioning

confidence: 91%

Method for assessing combat survivability for aircraft with wing damage

Pei

Chen

Wei

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

show abstract

“…This has provided a limited understanding of the flowfield and flow mechanisms, hence the need for more in-depth studies involving PIV. CFD simulations were performed by Yang et al (11) and Saeedi et al (12) on a solid model (no cavity), but were not validated, hence the need for more relevant CFD predictions on the current wing model. Irwin (2) performed experiments to test the effects of an internal cavity and concluded that it had only a small effect on the external flow and the lift and drag performance, but there is limited flowfield evidence to support this assertion.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the flowfield induced by simulated battle damage

et al. 2017

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Particle Image Velocimetry (PIV) has been used to study the complex flowfield created by simulated battle damage to a two-dimensional wing. Computational Fluid Dynamics (CFD) predictions have also been used for validation of internal cavity flow. Two damage cases were selected for the study; both cases were simulated using a single hole with diameters equal to 20% and 40% of the chord, located at the wing half-chord. Wind-tunnel tests were conducted at a Reynolds number of 500,000 over a range of incidences from 0 to 10° with two-component PIV measurements made on three chordwise and three spanwise planes. The PIV data were analysed and compared to CFD data of the same damage cases. The PIV data have shown lower velocity ratios and lower vorticity in the jet compared to past Jet in Cross-Flow experiments and CFD was used to describe the flow features inside the cavity of the wing. It was seen that the wing cavity has large effects on the external flow features, particularly for the 20% damage case. Finally, the flow field data have been related to force balance data. At higher incidence angles, the larger force coefficient increments in both lift and drag can be attributed to the larger wakes and higher jet strengths.

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“…Such a method will allow the survivability analyst to identify critical damage cases which may require more detailed investigation by either numerical or experimental methods. Whilst computational methods (1,2) can be used to predict the effects of battle damage with a reasonable degree of accuracy, the time required to generate model grids makes them unsuitable for rapidly assessing the wide range of possible damage scenarios on a wing in a short period of time. Possible damage cases on other lifting surfaces (e.g.…”

Section: Introductionmentioning

confidence: 99%