Two-dimensional numerical simulations on laser energy depositions in a supersonic flow over a semi-circular body

Joarder, R. N.; Padhi, Upasana Priyadarshani; Singh, Awanish Pratap; Tummalapalli, Harikrishna

doi:10.1016/j.ijheatmasstransfer.2016.10.025

Cited by 24 publications

(11 citation statements)

References 16 publications

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“…The laser pulse is introduced instantaneously into the domain (the details of the numerical domain, laser discharge, and boundary conditions are discussed in [40]). The physical properties after cessation of the laser pulse were determined using Helmholtz free energy minimization process [5]. The breakdown zone is characterized by the presence of ionized and dissociated species (O2, O, N2, N, NO, NO + and e − ) at high temperature and pressure.…”

Section: Numerical Simulation Showing Development Of Plamsa and Shok-...mentioning

confidence: 99%

“…Laser-induced breakdown (LIB) has attracted significant interest due to the wide range of potential applications. The single pulse LIB (SP-LIB) and the successive laser energy depositions (LED) have been used to generate plasma in various fields of science and engineering, such as ignition and combustion under different conditions [1,2], spectroscopic analyses [3,4], aerodynamic drag reduction [5,6,7], lift and moment control [8], biology and medicine [9,10,11], surface cleaning [12], metallurgy and material processing [13,14], local flow-field alternation [15], propulsion system and spacecraft thrusters [16], etc. Extensive research has been performed to understand the process of energy deposition with SP-LIB and it has been well understood.…”

Section: Introductionmentioning

confidence: 99%

“…It is known that weak ionization of gases leads to significant changes in drag reduction and the shock stand-off distance in front of a blunt body in ballistic tunnels. These interesting plasma effects are of great practical importance for high-speed aerodynamics and flight control [5,24]. Various techniques have recently been used to generate plasma, but unfortunately they have not been used in practice due to the complexity associated with the phenomena and their implementation.…”

Section: Introductionmentioning

confidence: 99%

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Insight into the evolution of laser-induced plasma during successive deposition of laser energy

Singh,

Padhi,

Joarder

2021

Preprint

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The interaction of high-temperature plasma with matter has several potential applications. In this study, we generated laser-induced plasma through single and successive laser energy deposition. The lifetime of the plasma is of paramount importance in most practical applications. However, this cannot be achieved with a single high-energy pulse due to some practical challenges. Therefore we carried out experimental and numerical investigations on the successive laser energy deposition and demonstrated its importance compared to the single pulse energy deposition. It has been observed that during successive energy deposition, the absorption of energy from the second pulse is nonlinear, and the reason for such behaviour is explained in this study. Due to the nonlinear absorption from the second pulse, this study therefore aims to present the pulse interval configuration between the successive pulses with which it is effective for practical use. In this study, some interesting and first direct observations of some new physical phenomena (generation of fourth-lobe and multiple shock waves) are observed during successive energy deposition when the pulse interval is 50 µs and 100 µs. This study also adopted new approch based on Maxwell's theory of momentum exchange between light and matter to explain the newly observed and some previously unexplained physical phenomena. Finally, to understand the evolution of the laser-induced plasma, the volume and volumetric expansion rate are calculated, which can be useful in determining its lifetime and mixing rate with the surrounding medium.

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Section: Numerical Simulation Showing Development Of Plamsa and Shok-...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Insight into the evolution of laser-induced plasma during successive deposition of laser energy

Singh,

Padhi,

Joarder

2021

Preprint

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“…Later, various studies were devoted to explore the structure of the flowfield due to pulsed energy deposition. Of these, the authors recommend the experiments of Oliviera et al [267], Sasoh et al [293], and Adelgren et al [260], the numerical simulations of Joarder et al [294], and the combined work of Schülein et al [295]. As for flowfield structure associated with continuous energy deposition devices, the authors recommend the experimental work of Schülein et al [296] and Satheesh, Jagadeesh [254].…”

Section: Survey On Key Studies On Energy Deposition Devicesmentioning

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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“…Webb [11] developed the localized arc filament plasma actuator(LAFPA) and revealed its capability in boundary layer modification. The LED has been shown its potential in suppression of boundary layer separation [12], shock stabilization [13], and wave drag reduction [14].…”

Section: Introductionmentioning

confidence: 99%

Characterization of transverse plasma jet and its effects on ramp induced separation

Tang

Wang

et al. 2018

Experimental Thermal and Fluid Science

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Plasma synthetic jet actuator (PSJA), which produces pulsed jets, is used to control the shock wave boundary layer interaction at a compression ramp at Ma=2.0. The flow topology of the wall jets from the PSJA is first visualised through particle laser scattering (PLS) photography. The PSJA aperture effect is also examined by comparing the jets out of the apertures of 1,2 mm and 2 mm respectively. The control effect is later investigated by both PLS and particle image velocimetry (PIV). , which was erupted from different jet apertures of 1.2mm and 2mm, were compared experimentally in a wind tunnel of Mach 2. Further, the interaction between the TPJ and the ramp induced separation was explored. The phase-locked two-component particle image velocimetry (PIV) and particle laser scattering (PLS) were used for flow visualizations. The K-H vortices and hairpin vortices due to the shear stress between the jet plume and high-speed mainstream were identified.The results show that the TPJ in supersonic flow is characterized by two typical parts: the attached jet plume (AJP) and the detached jet plume (DJP). The penetration height of the jet plume, which is closely related to the jet aperture, plays a dominant role in the proportion of the two parts. The higher jet penetration height leads to the more detached jet plume. As for the interaction between the jet plume and separation zone, the attached jet plume was blocked by the separation zone, which formed a recirculation zone and contributed to an expansion of the separation. In contrast, the detached jet plume transited along the shear layer and then enhanced the velocity exchange between the shear layer and mainstream. Ultimately, the reduction of the separation zone was revealed with the overall shear layer reduced. Furthermore, a conceptual model based on two typical morphological features was suggested to reveal the interaction mechanism.

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Two-dimensional numerical simulations on laser energy depositions in a supersonic flow over a semi-circular body

Cited by 24 publications

References 16 publications

Insight into the evolution of laser-induced plasma during successive deposition of laser energy

Insight into the evolution of laser-induced plasma during successive deposition of laser energy

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

Characterization of transverse plasma jet and its effects on ramp induced separation

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