Flowfield Measurements in a Mach 2 Fin-Generated Shock/Boundary-Layer Interaction

Arora, Nishul; Ali, Mohd Y.; Yang, Zhiru; Alvi, Farrukh S.

doi:10.2514/1.j056500

Cited by 29 publications

(7 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The flow conditions of the current work are described in table 1, in which the simulation conditions are placed in context with those of the experiments for both the SCR (Vanstone et al 2016) and SF (Baldwin et al 2016;Arora et al 2018) configurations. The simulation Reynolds number (Re) is reduced for computational feasibility, while maintaining the free-stream Mach number (M ∞ ) and velocity (U ∞ ), the stagnation temperature (T 0 ) and the boundary-layer momentum (Θ) and outer-scale (u(δ) = 0.99U ∞ ) thicknesses, and reducing the free-stream pressure (P ∞ ).…”

Section: Theoretical and Numerical Modelmentioning

confidence: 99%

“…have been validated in conjunction with experiments for both the SCR (Vanstone et al 2016(Vanstone et al , 2018 and SF (Baldwin et al 2016;Arora et al 2018) configurations. These include comparisons of surface flow visualization, surface pressure and all three velocity components in both Cartesian and spherical coordinates, which are discussed by Adler & Gaitonde (2017, 2018b, 2019a.…”

Section: Theoretical and Numerical Modelmentioning

confidence: 99%

“…These thrusts have been prompted by several recent advances in massively parallel simulations (Poggie, Bisek & Gosse 2015) as well as time-resolved unsteady measurements of high-speed flows (Beresh et al 2015) and other novel measurement techniques (Fahringer & Thurow 2018). The effort combines experimental measurements of the SCR (Vanstone et al 2016(Vanstone et al , 2018 and SF (Baldwin et al 2016;Jones et al 2017;Arora et al 2018) interactions, along with high-fidelity large-eddy simulations (Adler & Gaitonde 2017, 2018b, 2019a of both configurations. The swept-impinging-shock (SIS) interaction is also of great interest, and is the subject of parallel experimental (Doehrmann et al 2018) and computational (Gross, Little & Fasel 2018) efforts, but is not considered here.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dynamics of strong swept-shock/turbulent-boundary-layer interactions

Adler

Gaitonde

2020

J. Fluid Mech.

View full text Add to dashboard Cite

Section: Theoretical and Numerical Modelmentioning

confidence: 99%

Section: Theoretical and Numerical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of strong swept-shock/turbulent-boundary-layer interactions

Adler

Gaitonde

2020

J. Fluid Mech.

View full text Add to dashboard Cite

“…In the former category are the SF studies of Gibson & Dolling (1992) and Schmisseur & Dolling (1994), as well as the SCR measurements of Erengil & Dolling (1993), all of which also describe the observed unsteadiness as being one order lower than the characteristic frequencies of the upstream boundary layer. Contemporary experiments by Arora et al (2018) on a 15°SF SBLI at the same Mach number (2) but much higher Reynolds number (Re δ ∼ 1.5 × 10 5 ) than the simulations provide other key details. Figure 6e shows experimental results in the form of root-mean-square (RMS) wall-pressure fluctuations (σ p ) normalized by the mean wall pressure (P w ), for various frequency bands, obtained with Kulite transducers along a VCO-centered arc at a radius of approximately 13δ from the fin leading edge.…”

Section: Asymptotic Swept Interactions: Characterization Of Unsteadinessmentioning

confidence: 90%

Dynamics of Three-Dimensional Shock-Wave/Boundary-Layer Interactions

Gaitonde

Adler

2023

Annu. Rev. Fluid Mech.

View full text Add to dashboard Cite

Advances in measuring and understanding separated, nominally two-dimensional (2D) shock-wave/turbulent-boundary-layer interactions (STBLI) have triggered recent campaigns focused on three-dimensional (3D) STBLI, which display far greater configuration diversity. Nonetheless, unifying properties emerge for semi-infinite interactions, taking the form of conical asymptotic behavior where shock-generator specifics become insignificant. The contrast between 2D and 3D separation is substantial; the skewed vortical structure of 3D STBLI reflects the essentially 2D influence of the boundary layer on the 3D character of the swept shock. As with 2D STBLI, conical interactions engender prominent spectral content below that of the turbulent boundary layer. However, the uniform separation length scale, which is crucial to normalizing the lowest-frequency dynamics in 2D STBLI, is absent. Comparatively, the spectra of 3D STBLI are more representative of the mid-frequency, convective, shear-layer dynamics in 2D, while phenomena associated with 2D separation-shock breathing are muted. Asymptotic behavior breaks down in many regions important to 3D-STBLI dynamics, occurring in a configuration-dependent manner. Aspects of inceptive regions near shock generators and symmetry planes are reviewed. Focused efforts toward 3D modal and nonmodal analyses, moving-shock/boundary-layer interactions, fluid/structure interactions, and flow control are suggested as directions for future work. Expected final online publication date for the Annual Review of Fluid Mechanics, Volume 55 is January 2023. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.

show abstract

“…Nevertheless, the interactions between swept shock and the sidewall boundary layer led to three-dimensional interactions. 2,3 Therefore, the flows, including shock wave boundary layer interactions, are complex and generally accompanied by a series of vortex structures. 4,5 Previous studies have mostly investigated this flow by visualizing or measuring multiple parameters using various methods, including particle image velocimetry (PIV), pressure sensitive paint (PSP), schlieren, and oil flow.…”

Section: Introductionmentioning

confidence: 99%

Visualization of separation and reattachment in an incident shock-induced interaction

Jiao

Wang

2021

Proceedings of the Institution of Mechanical Engineers, Part G:

View full text Add to dashboard Cite

An experimental study is conducted on the qualitative visualization of the flow field in separation and reattachment flows induced by an incident shock interaction by several techniques including shear-sensitive liquid crystal coating (SSLCC), oil flow, schlieren, and numerical simulation. The incident shock wave is generated by a wedge in a Mach 2.7 duct flow, where the strength of the interaction is varied from weak to moderate by changing the angle of attack α of the wedge from 8° and 10° to 12°. The stagnation pressure upstream was set to approximately 607.9 kPa. The SSLCC technique was used to visualize the surface flow characteristics and analyze the surface shear stress fields induced by the initial incident shock wave over the bottom wall and sidewall experimentally which resolution is 3500 × 200 pixels, and the numerical simulation was also performed as the supplement for a clearer understanding to the flow field. As a result, surface shear stress over the bottom wall was visualized qualitatively by SSLCC images, and flow features such as separation/reattachment and the variations of position/size of separation bubble with wedge angle were successfully distinguished. Furthermore, analysis of shear stress trend over the bottom wall by a hue value curve indicated that the relative magnitude of shear stress increased significantly downstream of the separation bubble compared with that upstream. The variation trend of shear stress was consistent with the numerical simulation results, and the error of separation position was less than 2 mm. Finally, the three-dimensional schematic of incident shock-induced interaction has been achieved by qualitative summary by multiple techniques, including SSLCC, oil flow, schlieren, and numerical simulation.

show abstract

Flowfield Measurements in a Mach 2 Fin-Generated Shock/Boundary-Layer Interaction

Cited by 29 publications

References 25 publications

Dynamics of strong swept-shock/turbulent-boundary-layer interactions

Dynamics of strong swept-shock/turbulent-boundary-layer interactions

Dynamics of Three-Dimensional Shock-Wave/Boundary-Layer Interactions

Visualization of separation and reattachment in an incident shock-induced interaction

Contact Info

Product

Resources

About