Interaction strength and model geometry effects on the structure of crossing-shock wave/turbulent boundary-layer interactions

Garrison, T. J.; Settles, Gary S.

doi:10.2514/6.1993-780

Cited by 26 publications

(15 citation statements)

References 9 publications

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“…78 by the stream ribbons together with the footprint of each regime (coherent feature) (Fig. 79) in accordance with RANS computations by Gaitonde and Shang [189] and Gaitonde et al [192,193,197] performed for the test configuration investigated experimentally by Garrison and Settles [178] and Zheltovodov et al [187,194] Fig. 78 [189,193,197,218] that the incoming boundary layer separates at the line of coalescence S1 and its symmetric counterpart S2 (not marked).…”

Section: Advances In Cfd Prediction Of Shock Wave Turbulent Boundary supporting

confidence: 60%

“…As it is seen from the perspective view and cross section III, the entire incident λ-shock structure reflects from the center plane in an irregular manner and remains intact, though somewhat distorted, propagating away from the center toward the fin surface. The additional cross sections that characterize details of the complex shock crossings between the cross sections I and III are considered in [173,177,178]. As shown in cross section III, two additional shock segments and two triple points are observed to form a result of this crossing.…”

Section: -D Double Finmentioning

confidence: 99%

“…Since that time, interest in this problem has greatly increased due to its relationship to scramjet propulsion since the crossing shock interaction constitutes a geometrical simplification of a hypersonic sidewall compression inlet. Symmetric interactions (i.e., α 1 = α 2 ) have been studied by [6,159,164,168,169,170,171,172,173,174,175,176,177,178,179,180,181,182,183,184,185,186,187,188,189,190,191,192,193,194,195,196,197,198,199,200,201,202,203,204,205,206,207,208,209]. Asymmetrical interactions (i.e., α 1 = α 2 ) have been studied by [6,164,167,…”

Section: -D Double Finmentioning

confidence: 99%

“…The most complete cycle of experimental research of the symmetrical interaction between crossing shock waves with a turbulent boundary layer for M ∞ = 3 and 4 is presented in [172,174,177,178,184,185,186]. In addition to the patterns of the limiting streamlines Studies dealing with unsteady effects are infrequent, but nonetheless extremely important.…”

Section: -D Double Finmentioning

confidence: 99%

“…The calculations conducted for symmetrical [159,164,170,174,175,176,177,180,181,182,183,184,186,188,189,190,191,192,193,199,200,201,202,203,204,205,206,208,209,210,213,214] and asymmetrical [164,187,192,193,197,199,202,203,204,208,209,211,212,213,214,215,216,218] interactions and for symmetrical fins mounted on the compression surface [190,219]. As it follows from review of investigations of the flow for symmetrical and asymmetrical intera...…”

Section: -D Double Finmentioning

confidence: 99%

See 4 more Smart Citations

Advances in CFD prediction of shock wave turbulent boundary layer interactions

Knight

Yan

Panaras³

et al. 2003

Progress in Aerospace Sciences

254

114

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Section: Advances In Cfd Prediction Of Shock Wave Turbulent Boundary supporting

confidence: 60%

Section: -D Double Finmentioning

confidence: 99%

Section: -D Double Finmentioning

confidence: 99%

Section: -D Double Finmentioning

confidence: 99%

Section: -D Double Finmentioning

confidence: 99%

See 3 more Smart Citations

Advances in CFD prediction of shock wave turbulent boundary layer interactions

Knight

Yan

Panaras³

et al. 2003

Progress in Aerospace Sciences

254

114

View full text Add to dashboard Cite

Influence of separation structure on the dynamics of shock/turbulent-boundary-layer interactions

Adler

Gaitonde

2021

Theor. Comput. Fluid Dyn.

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Shock/turbulent-boundary-layer interactions (STBLIs) are ubiquitous in high-speed flight and propulsion applications. Experimental and computational investigations of swept, three-dimensional (3-D) interactions, which exhibit quasi-conical mean-flow symmetry in the limit of infinite span, have demonstrated key differences in unsteadiness from their analogous, two-dimensional (2-D), spanwise-homogeneous counterparts. For swept interactions, represented by the swept–fin-on-plate and swept–compression–ramp-on-plate configurations, differences associated with the separated shear layers may be traced to the intermixing of 2-D (spanwise independent) and 3-D (spanwise dependent) scaling laws for the separated mean flow. This results in a broader spectrum of unsteadiness that includes relatively lower frequencies associated with the separated shear layers in 3-D interactions. However, lower frequency ranges associated with the global “breathing” of strongly separated 2-D interactions are significantly less prominent in these simple, swept 3-D interactions. A logical extension of 3-D interaction complexity is the compound interaction formed by the merging of two simple interactions. The first objective of this work is therefore to analyze the more complex picture of the dynamics of such interactions, by considering as an exemplar, wall-resolved simulations of the double-fin-on-plate configuration. We show that in the region of interaction merging, new flow scales, changes in separation topology, and the emergence of lower-frequency phenomena are observed, whereas the dynamics of the interaction near the fin leading edges are similar to those of the simple, swept interactions. The second objective is to evolve a unified understanding of the dynamics of STBLIs associated with complex configurations relevant to actual propulsion systems, which involve the coupling between multiple shock systems and multiple flow separation and attachment events. For this, we revisit the salient aspects of scaling phenomena in a manner that aids in assimilating the double-fin flow with simpler swept interactions. The emphasis is on the influence of the underlying structure of the separated flow on the dynamics. The distinct features of the compound interactions manifest in a centerline symmetry pattern that replaces the quasi-conical symmetry of simple interactions. The primary separation displays topological closure to reveal new length scales, associated unsteadiness bands, and secondary flow separation.

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Three-dimensional characteristics of crossing shock wave/turbulent boundary layer interaction in a double fin with and without micro-ramp control

Wang

Zhao

et al. 2022

AIP Advances

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The three-dimensional (3D) interactions between crossing shock waves and a turbulent boundary layer (CSWBLI) inside a symmetric double fin are experimentally studied using nanoparticle-based planar laser scattering, supersonic particle image velocimetry, and surface oil visualization. The possibility of controlling the separated flow generated by CSWBLI is considered by employing micro-ramp vortex generators. First, the fractal dimension, velocity profile, and logarithmic law of the incoming turbulent boundary layer at Mach number 2.8 are examined. Then, the flow structure and velocity distribution, which have seldom been presented in previous experiments, are measured in high resolution. The 3D behavior of the boundary layer after CSWBLI shows that the boundary layer becomes thicker behind the shock wave and converges toward the symmetry plane of the double fin. The converged effect contributes to the largest thickness of the boundary layer in the symmetry plane accompanied with a separation region near the wall. Introduction of seven equidistant micro-ramps upstream of the double fin is proved to suppress the separation region, where the arc-like vortices generated by the middle micro-ramps are found to be more sustainable along the streamwise direction. The micro-ramps can increase the momentum exchange between the boundary layer and the surrounding mainstream. At the same time, the momentum exchange induced by the micro-ramps decreases the flow velocity outside the converged region in comparison with the configuration without micro-ramps. The results obtained in this paper can provide an experimental insight into the 3D physical phenomena existing in the CSWBLI and its flow control.

show abstract

Interaction strength and model geometry effects on the structure of crossing-shock wave/turbulent boundary-layer interactions

Cited by 26 publications

References 9 publications

Advances in CFD prediction of shock wave turbulent boundary layer interactions

Advances in CFD prediction of shock wave turbulent boundary layer interactions

Influence of separation structure on the dynamics of shock/turbulent-boundary-layer interactions

Three-dimensional characteristics of crossing shock wave/turbulent boundary layer interaction in a double fin with and without micro-ramp control

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