Experimental investigation of supersonic flow about an obstacle with power delivery into the undisturbed flow

Borzov, V. Yu.; Mikhailov, V. M.; Rybka, I. V.; Savishchenko, N. P.; Yur'ev, A. S.

doi:10.1007/bf00851704

Cited by 12 publications

(16 citation statements)

References 1 publication

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“…The optical system provided a spatial resolution of ~100 mm for the thermal track, and the electronic detection system had a temporal resolution of ~50 ns. The dynamics of energy absorption in the zone of the optical discharge was measured using FD-24K photodiodes for incident (13) and passed ( 14 ) laser radiation and an FK-22 coaxial vacuum photocell ( 12 ) for detecting light from the plasmoid. Electrical signals from photodetectors were recorded by oscilloscope ( 11 ).…”

Section: Methodsmentioning

confidence: 99%

Influence of an optical pulsed discharge on the structure of a supersonic air flow

Malov¹,

Orishich²

2014

Quantum Electron.

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Section: Methodsmentioning

confidence: 99%

Influence of an optical pulsed discharge on the structure of a supersonic air flow

Malov¹,

Orishich²

2014

Quantum Electron.

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“…In other areas, energy deposition has found applications in reducing sonic boom [246] and improving intake conditions for supersonic/hypersonic propulsion engines [247]. The level of the energy deposition in the undisturbed upstream should be high enough that the local air reaches the thermal (homogeneous) plasma state in which it becomes extremely hot, fully ionized and electrically conductive [248]. The continuous feed of the freestream maintains the plasma cloud in the upstream.…”

Section: Energetic (Thermal) Devices Energy Deposition Devices: 41mentioning

confidence: 99%

“…7b. Pulsed repetition of energy deposition yields a more complicated flowfield structure that is dependent on the energy level, repetition frequency, pulse duration, and deposition location [248]. If the energy spot is made continuously active, the flowfield features are modified.…”

Section: Ac Electric Discharge 31%mentioning

confidence: 99%

“…78c. The replacement of the conventional bow fore shock with a system of weaker shock as well as the low-pressure recirculation zone downstream of a rarefied gas channel act to reduce the drag on the forebody [247,248,252]. Instability of the flowfield around the forebody can take place with both continuous [261,265,266] and pulsed energy deposition [267,268] devices.…”

Section: Ac Electric Discharge 31%mentioning

confidence: 99%

“…If the freestream Mach value is increased, the deposition distance should increase to yield the same effectiveness [253]. In addition, more drag reduction is achieved with the same energy intensity as the freestream pressure decreases [286] while higher freestream pressure enables using less intense energy deposition to achieve the same effectiveness [248]. The effectiveness of energy devices degrades with reducing both pressure [286] and density [254] of the freestream.…”

Section: Factors Controlling the Energy Deposition Devices Effectivenessmentioning

confidence: 99%

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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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«Impulsar»: New Application for High Power/Energy High Repetition Rate Pulse-Periodic Lasers

Аполлонов

2018

High-Conductivity Channels in Space

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Experimental investigation of supersonic flow about an obstacle with power delivery into the undisturbed flow

Cited by 12 publications

References 1 publication

Influence of an optical pulsed discharge on the structure of a supersonic air flow

Influence of an optical pulsed discharge on the structure of a supersonic air flow

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

«Impulsar»: New Application for High Power/Energy High Repetition Rate Pulse-Periodic Lasers

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