2013
DOI: 10.1155/2013/147916
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Effects of Inflow Mach Number and Step Height on Supersonic Flows over a Backward-Facing Step

Abstract: The backward-facing step is practically implicated in many devices, encountering the massive separation flows. In the present study, simulations of supersonic flow over a backward-facing step have been carried out employing both RANS and LES. The simulated results are validated against the experimental data. The results of RANS and LES show a good comparison with the experimental results. Different inflow Mach numbers and expansion ratios are also investigated. The reattachment length decreases with the increa… Show more

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Cited by 14 publications
(8 citation statements)
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References 35 publications
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“…The figure reveals that the centre of the shear layer extends further into the low-speed side as the convective Mach number increases (see figure 15b). This finding may help to explain the phenomenon in the backward-facing step (known as BFS) flow, where the reattachment length decreases as the inflow Mach number increases (Chen et al 2012;Liu et al 2013). This shifting of the mean velocity profile in the FSL has been reported in previous studies, both experimental and numerical (Elliott & Samimy 1990;Goebel & Dutton 1991;Fu & Li 2006).…”
Section: Self-similar Turbulence Regionsupporting
confidence: 74%
See 1 more Smart Citation
“…The figure reveals that the centre of the shear layer extends further into the low-speed side as the convective Mach number increases (see figure 15b). This finding may help to explain the phenomenon in the backward-facing step (known as BFS) flow, where the reattachment length decreases as the inflow Mach number increases (Chen et al 2012;Liu et al 2013). This shifting of the mean velocity profile in the FSL has been reported in previous studies, both experimental and numerical (Elliott & Samimy 1990;Goebel & Dutton 1991;Fu & Li 2006).…”
Section: Self-similar Turbulence Regionsupporting
confidence: 74%
“…2012; Liu et al. 2013). This shifting of the mean velocity profile in the FSL has been reported in previous studies, both experimental and numerical (Elliott & Samimy 1990; Goebel & Dutton 1991; Fu & Li 2006).…”
Section: Energy Exchangementioning
confidence: 99%
“…Compression waves are generated around the reattachment location, which coalesce into a reattachment shock (white solid line). The low-speed recirculating flow forms a separation bubble underneath the dividing line (here defined for convenience as the isoline of u = 0 indicated by black dashed line), while the high-speed part proceeds downstream by overcoming the slight pressure rise [28]. The mean reattachment length is about L r = 10.9δ 0 (3.6h), which is consistent with the existing results, reporting that the reattachment length is usually within 3.0 ∼ 4.0h around the current Mach number [28,29].…”
Section: A Mean Flow Visualizationmentioning
confidence: 99%
“…The scope of this article is to construct a well-posed equation system for the droplet governing equations based on the kinetic theory and carry out the numerical simulation of transverse liquid jet to a supersonic crossflow. For turbulence modeling of the two phases, the k-e model was applied to the gas phase with compressible correction, 28 while the one-equation k p model was used to describe the turbulence in droplet phase. 24 Characteristics analysis was employed to investigate the well-posedness of the governing equation system, and the hyperbolic nature based on the kinetic theory was then demonstrated.…”
Section: Introductionmentioning
confidence: 99%