Drag on blunt bodies with and without spikes in low-density hypersonic flow

Boylan, D. E.; Hahn, J S; Sims, W. H.

doi:10.2514/3.2863

Cited by 11 publications

(3 citation statements)

References 3 publications

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“…34 The addition of spike to the forebody has some limitations. A spike has insignificant impact, if it is of short length 74 and a body do not have blunt shape, 82 in rarefied conditions 110 or at low Mach number. 36,67 At high angles of attack, vehicles stability was affected by the implementation of the spike unless some additional devices 104 were added to handle it at the cost of design simplicity.…”

Section: The Complete Description Of Aerodynamic Simulationmentioning

confidence: 99%

Review of wave drag reduction techniques: Advances in active, passive, and hybrid flow control

Rashid

Nawaz

Maqsood

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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Typical challenges of supersonic flight include wave drag, acoustic signature, and aerodynamic heating due to the formation of shock waves ahead of the vehicle. Efforts in the form of sleek aerodynamic designs, better propulsion systems, and the implementation of passive and active techniques are generally adopted to achieve a weaker shock wave system. Shock reduction can improve flight range, reduce fuel consumption, and provide thermal protection of the forebody region. This paper briefly reviews shock reduction techniques, including passive, active, and hybrid flow control. Airfoil shape optimization, mechanical spike, and forebody cavities are studied as passive flow control approaches. For active flow control, developments in the area of opposing jets and energy deposition are explored. The combination of active and passive flow control and the hybrid flow techniques are discussed in the end. The discussions include the principle of operation, physics of fluid behavior, and overall contribution to flight stability characteristics. The implications in the usage of these technologies, along with potential gaps, are also identified. This comprehensive review can serve as the basis for contemporary solutions to realize sustainable supersonic travel for the aviation industry.

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Section: The Complete Description Of Aerodynamic Simulationmentioning

confidence: 99%

Review of wave drag reduction techniques: Advances in active, passive, and hybrid flow control

Rashid

Nawaz

Maqsood

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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show abstract

“…However, the use of spikes is subject to some limitations. Clearly, the spike produces no significant effect if it is very short [26], in low Mach number values [2,28], or in rarefied conditions [29]. In addition, the spike becomes effective only if the forebody is blunt enough to generate a bow shock wave ahead of it [30].…”

Section: Introductionmentioning

confidence: 99%

“…Among other models representing the common re-entry vehicle designs, blunt parabolic cylindrical and hemisphere cylindrical models were equipped with a pointed spike of variable length ( D L / up to 5). The performance of spikes at incidence in very low Reynolds number environments (similar to those experienced by planetary vehicles) was investigated by Sims et al[29]. The drag on two models namely, flat cylinder and highly blunt cone in a Mach 10.1, Reynolds 194 Nitrogen flow was measured.…”

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confidence: 99%

Aerothermodynamics of Spiked Bodies: Part I

Ahmed¹,

Qin

2011

International Conference on Aerospace Sciences and Aviation Tec

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Among a variety of design requirements, reducing the drag and aeroheating on hypersonic vehicles are the most crucial. Unfortunately, these two objectives are often conflicting. On one hand, sharp slender forebodies design reduces the drag and ensures longer ranges and more economic flights. However, they are more vulnerable to aerodynamic heating. On the other hand, blunt forebodies produce more drag however, they are preferred as far as aeroheating is concerned. In addition, in the context of hypersonic vehicles, blunt geometries are preferred over slender ones for practical implications such as higher volumetric efficiency, better accommodation of crew or on-board equipment.

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Mechanical techniques (spike)

Gerdroodbary¹

2023

Aerodynamic Heating in Supersonic and Hypersonic Flows

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Drag on blunt bodies with and without spikes in low-density hypersonic flow

Cited by 11 publications

References 3 publications

Review of wave drag reduction techniques: Advances in active, passive, and hybrid flow control

Review of wave drag reduction techniques: Advances in active, passive, and hybrid flow control

Aerothermodynamics of Spiked Bodies: Part I

Mechanical techniques (spike)

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