Fluid–Structure–Jet Interaction Effects on High-Speed Vehicle Performance and Stability

Kitson, Ryan C.; Cesnik, Carlos E. S.

doi:10.2514/1.a34191

Cited by 6 publications

(3 citation statements)

References 26 publications

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“…When the mixing ratio is sufficiently high, or in the presence of surfactant additives, an emulsion can be formed. Emulsified water is homogeneously dispersed into the oil [40].…”

Section: Water Contaminationmentioning

confidence: 99%

Research on Testing Method of Oil Characteristic Based on Quartz Tuning Fork Sensor

2021

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There is increasing demand for the on-board diagnosis of lubricating oils. In this research, we consider various sensor principles for on-board diagnosis of the thermal aging of engine oils. One of the parameters investigated is the viscosity of the lubricating oil, which can be efficiently measured using a microacoustic sensor. Compared with conventional viscometers, these sensors probe a different rheological domain, which needs to be considered in the interpretation of measurement results. This specific behavior is examined by systematically investigating engine oils, with and without additive packages, that were subjected to a defined artificial aging process. This paper presents design strategies for the algorithm developed and applied for direct on-board diagnosis of engine oil conditions with a fluid property sensor; this enables prediction of remaining oil life and optimization of oil change intervals, thereby minimizing the likelihood of dramatic engine failure and reducing maintenance costs. After a general description of the principles of sensor measurement, different engine oil contaminants, aging phenomena, and associated sensor detection and measurement capabilities are discussed.

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“…When the mixing ratio is sufficiently high, or in the presence of surfactant additives, an emulsion can be formed. Emulsified water is homogeneously dispersed into the oil [40].…”

Section: Water Contaminationmentioning

confidence: 99%

Research on Testing Method of Oil Characteristic Based on Quartz Tuning Fork Sensor

2021

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“…However, air-to-air missiles generally involve large slenderness ratios, such that their structural stiffness is small and the elastic effect becomes prominent especially with the wide application of new composite materials. The complicated unsteady flow near the missile internal bay and the interactions due to the elastic effects deteriorate the launch performance of the missile and even threaten the carrier safety [6]. Therefore, it is necessary to study the influence of aeroelasticity on the separation trajectory of missile when it is released from the embedded missile bay.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Aeroelasticity Effect on Missile Separation from the Internal Bay

Tian

2023

International Journal of Aerospace Engineering

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There is a strong aerodynamic interference when launching the missile in the embedded mode. During the separation process, the carrier aircraft safety may be threatened due to large slenderness ratio, low structural stiffness, and aeroelasticity effects of the missile. The present study simulates missile separation in the presence of the aeroelasticity effects based on the computational fluid dynamics (CFD), rigid body dynamics (RBD), and computational structure dynamics (CSD) coupling method. A hybrid dynamic grid method consisting of the mixed overset unstructured grid and deformation grid is utilized. In order to verify the accuracy of the coupled numerical method, store separation from a wing and AGARD 445.6 wing flutter are first simulated as two standard test cases. The verification results imply that the present coupled numerical method is reliable and capable in simulation of the aeroelastic effect in missile separation. The influence of aeroelasticity on the separation trajectory of a missile from the internal bay is systematically studied at different states. Numerical results show that aeroelasticity substantially affects the missile angular displacement, while it has a slight impact on the linear displacement of the center of mass. Mach number and flight altitude are two important flight parameters that characterize the aeroelasticity effect on missile separation from the internal bay.

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“…Pudsey [11,17] used numerical simulations to investigate the jet interaction flow field and multi-jet interaction characteristics, as well as the influence of nozzle configuration and turbulence model on the flow field. Kitson [18] investigated the influence of jet-induced fluid-solid interaction on aircraft performance and stability. Through tests, Erdem [19] examined the sonic transverse jets at Mach 5 crossflow across a flat plate with a sharp leading edge.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Investigation on Nosebleed Air Jet Control for Hypersonic Vehicle

et al. 2023

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A new idea of nosebleed air jets with strong coupled internal and external flow is put forward using the lateral jet control principle to improve the maneuverability and fast reaction capabilities of hypersonic vehicles. The hypersonic vehicle’s nose stagnant high-pressure and high-temperature gas is utilized as the drive source for long-term jet control. The significant coupled jet interaction of the internal and external flow changes the aerodynamic characteristics. As a result, the structure is basic and does not rely on any external source to achieve flight attitude control. The complicated flow characteristics of the nosebleed jet in supersonic crossflow surrounding the vehicle were numerically and experimentally investigated. The jet interaction characteristics and the aerodynamic characteristic changes generated by the nosebleed air jet are verified by comparing the flow field with and without the jet. Results indicate that the nosebleed air jet alters the center-of-pressure coefficient, which is subsequently coupled with the interference aerodynamic force. This results in a variation in pitch moment. The jet decreases the pitching moment coefficient when compared with the case without a jet. It is probable that combining nosebleed air jets with model centroid adjustment yields an optimal trim angle of attack.

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Fluid–Structure–Jet Interaction Effects on High-Speed Vehicle Performance and Stability

Cited by 6 publications

References 26 publications

Research on Testing Method of Oil Characteristic Based on Quartz Tuning Fork Sensor

Research on Testing Method of Oil Characteristic Based on Quartz Tuning Fork Sensor

Investigation of Aeroelasticity Effect on Missile Separation from the Internal Bay

Numerical and Experimental Investigation on Nosebleed Air Jet Control for Hypersonic Vehicle

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