Journal ArticleDOI
Effects of steady flow heating by arc discharge upstream of non-slender bodies
TLDR
In this article, the influence of steady energy addition into the flow by a lowvoltage DC-arc discharge located upstream of conically nosed and spherically blunted bodies was investigated experimentally in the Ludwieg-Tube Facility at Mach 5.Abstract:
The influence of steady energy addition into the flow by a low-voltage DC-arc discharge located upstream of conically nosed and spherically blunted bodies was investigated experimentally in the Ludwieg-Tube Facility at Mach 5. The results include drag force measurements and shadowgraph flow visualizations. The flow-field structure, arising due to the bow-shock/heated-wake interaction, as well as the bow-shock intensity and heating power effects on the drag reduction is analyzed in this paper. The results demonstrate the existence of an optimum heating rate, providing a maximum effectiveness of energy addition and showing distinct drag reductions up to 70% dependent on test conditions and model geometries.read more
Citations
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Effects of upstream boundary layer on the unsteadiness of shock induced separation
TL;DR: Ganapathisubramani et al. as discussed by the authors investigated the relationship between the upstream boundary layer and the lowfrequency, large-scale unsteadiness of the separated flow in a Mach 2 compression ramp interaction by performing wide-field particle image velocimetry (PIV) and planar laser scattering (PLS) measurements in streamwise-spanwise planes.
Journal ArticleDOI
Experimental investigation on drag and heat flux reduction in supersonic/hypersonic flows: A survey
TL;DR: In this paper, the authors summarized the research progress of experimental investigations on drag and heat reduction are summarized by several kinds of mechanism, namely the forward-facing cavity, the opposing jet, the aerospike, the energy deposition and their combinational configurations.
Journal ArticleDOI
Quasi-DC electrical discharge characterization in a supersonic flow
TL;DR: In this paper, the dynamics and plasma parameters of a quasi-DC discharge were analyzed in the Supersonic Test Rig (SBR-50) at the University of Notre Dame at Mach number M = 2, stagnation pressure P ≥ 0.9 − 2.6, stagnation temperature T ≥ 300 K, unit Reynolds number ReL = 7 − 25 m−1, and plasma power W ≥ 3 − 21 kW.
Journal ArticleDOI
Joule heating flow control methods for high-speed flows
TL;DR: A review of a group of flow control methods that employ Joule heating to do so and can collectively be called energy deposition flow control is presented in this paper, which brings together the fundamental physics behind the operation of such methods.
Journal ArticleDOI
Forebody shock control devices for drag and aero-heating reduction: A comprehensive survey with a practical perspective
M. Y. M. Ahmed,Ning Qin +1 more
TL;DR: A comprehensive survey on the field of forebody shock control devices is presented in this article, where the authors categorize the various forebody shocks 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.
References
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Journal ArticleDOI
Fifty Years of Shock-Wave/Boundary-Layer Interaction Research: What Next?
TL;DR: In this article, the authors make some suggestions as to where future efforts might be focused, based on the author's own views and those of colleagues, as well as some suggestions are made as to how future efforts can be focused.
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Plasmas in high speed aerodynamics
TL;DR: A review of the studies in the former Soviet Union and in the USA of the mutual interactions of plasmas and high speed flows and shocks is presented in this article, where the convergence through more controlled experiments and improved modelling to a physics understanding of the effects being essentially due to heating is outlined.
Journal ArticleDOI
Effects of upstream boundary layer on the unsteadiness of shock-induced separation
TL;DR: Ganapathisubramani et al. as discussed by the authors investigated the relationship between the upstream boundary layer and the lowfrequency, large-scale unsteadiness of the separated flow in a Mach 2 compression ramp interaction by performing wide-field particle image velocimetry (PIV) and planar laser scattering (PLS) measurements in streamwise-spanwise planes.
Effects of upstream boundary layer on the unsteadiness of shock induced separation
TL;DR: Ganapathisubramani et al. as discussed by the authors investigated the relationship between the upstream boundary layer and the lowfrequency, large-scale unsteadiness of the separated flow in a Mach 2 compression ramp interaction by performing wide-field particle image velocimetry (PIV) and planar laser scattering (PLS) measurements in streamwise-spanwise planes.
Journal ArticleDOI
Relationship between upstream turbulent boundary-layer velocity fluctuations and separation shock unsteadiness
TL;DR: In this paper, the authors investigated the relationship between upstream turbulent boundary-layer properties and the unsteady separation shock behavior in a Mach 5 unswept compression ramp interaction and found that a fuller velocity is associated with increased resistance to separation to the boundary layer and, hence, causes downstream shock motion.