Experimental investigation of the characteristics of unsteady-state breakaway zones arising in a supersonic flow at a needle with a screen

Antonov, A. N.; Gretsov, V. K.

doi:10.1007/bf01089676

Cited by 7 publications

(3 citation statements)

References 4 publications

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“…Finally, the active research group in the field of mechanical spike device are addressed. Antonov et al focused in their experiments on flow unsteadiness related to mechanical spikes [67,[74][75][76]. The group of Reddy conducted a set of experimental and simulation studies in the field of mechanical spikes [3,46,77,78].…”

Section: Survey On Key Studies On Mechanical Spikesmentioning

confidence: 99%

Forebody shock control devices for drag and aero-heating reduction: A comprehensive survey with a practical perspective

Ahmed

Qin

2020

Progress in Aerospace Sciences

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One key feature that distinguishes the flowfield around vehicles flying in supersonic and hypersonic regimes is the bow shock wave ahead of forebody. The severe drag and aeroheating impacting these vehicles can be significantly reduced if the bow shock wave ahead of the vehicles forebodies is controlled to yield weaker system of oblique shocks. Benefits of forebody shock control include increasing flight ranges, economizing fuel consumption, reducing dead weights, and thermally protecting forebody structure and onboard equipment. Forebody shock control that has been widely studied since the early 1900s is achievable in numerous techniques that vary according to the mechanism of control. While some of these techniques have already been implemented in real systems, other techniques involve serious complications and tough trade-offs. The present paper is intended to serve as the first comprehensive survey on the field of forebody shock control devices. The objectives of the present paper are multifold. The paper categorizes the various forebody shock control devices in a physics-based manner, explains the underlying physics for each device, and surveys the key studies and state-of-the-art knowledge. The paper also addresses the existing gaps in knowledge, highlights the existing systems implementing these devices, and discusses the associated practical implementation issues and design-tradeoffs. 2. Structural devices, the mechanical spikes: 2.1. Principle of operation of mechanical spikes Drag and Aeroheating Reduction Devices Fluidic Devices Opposing jets Structural Devices Mechanical spikes Energetic Devices Energy deposition Basic devices Structural-Fluidic Devices Structural-Energetic Devices Hybrid devices

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Section: Survey On Key Studies On Mechanical Spikesmentioning

confidence: 99%

Forebody shock control devices for drag and aero-heating reduction: A comprehensive survey with a practical perspective

Ahmed

Qin

2020

Progress in Aerospace Sciences

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“…However, in the Russian literature for some years later, oscillation and pulsation modes were termed as pulsation of the first kind and pulsation of the second kind, respectively. For instance, Antonov and his co-researchers conducted a number of experimental investigations on unsteady flow around spiked models [61,[62][63][64]. In [61], they investigated the flow around a spiked flat cylindrical model in a Mach 6, Reynolds 6 10 1 freestream.…”

Section: Studies Focusing On the Flow Unsteadiness Around Spiked Bmentioning

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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“…3.27) a separation zone is periodically generated on the spike, grows vigorously in size, and then vanishes. Several authors [Antonov et al 1976, Antonov & Gretsov 1977, Zapryagaev & Mironov 1990] have investigated the physical pattern of flows with fluctuations of the separation zone. Although a rigorous theory does not exist, the main characteristics of the phenomenon as a function of the geometrical parameters of the configuration and physical characteristics of the free stream have been found.…”

Section: Recirculation Zone In the Shock Layer Ahead Of The Platementioning

confidence: 99%

Unsteady gas flows and particle dynamics in the shock layer formed by the impingement of a supersonic two-phase jet onto a plate

Klinkov¹

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Experimental investigation of the characteristics of unsteady-state breakaway zones arising in a supersonic flow at a needle with a screen

Cited by 7 publications

References 4 publications

Forebody shock control devices for drag and aero-heating reduction: A comprehensive survey with a practical perspective

Forebody shock control devices for drag and aero-heating reduction: A comprehensive survey with a practical perspective

Aerothermodynamics of Spiked Bodies: Part I

Unsteady gas flows and particle dynamics in the shock layer formed by the impingement of a supersonic two-phase jet onto a plate

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