Back-Pressure Effects on the Hypersonic Inlet-Isolator Pseudoshock Motions

Su, Weiyi; Kun-yuan, Zhang

doi:10.2514/1.b34803

Cited by 41 publications

(13 citation statements)

References 17 publications

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“…The characteristics of such a shock system depend on a number of variables including: the passage geometry, wall friction, Mach number, Reynolds number based on the duct hydraulic diameter, boundary layer thickness, and pressure conditions at the two extremities of the duct. [1][2][3][4][5][6] It has been reported that the shock wave structure changes depending mainly on the variation of the boundary layer thickness upstream of the shock train. [7][8][9] This is in agreement with Babinsky & Harvey, 10 who reported that multiple shocks are more likely to occur when the ratio of boundary layer displacement thickness to duct height is greater than a few percent.…”

Section: Introductionmentioning

confidence: 99%

Effect of back-pressure forcing on shock train structures in rectangular channels

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Effect of back-pressure forcing on shock train structures in rectangular channels

et al. 2018

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“…In our previous research, the unstart process for a hypersonic inlet was also carried out, and it demonstrated that the unsteady simulation results accord well with the experimental data [26].…”

Section: Fig 7 Distributions Of Dimensionless Wall Pressurementioning

confidence: 49%

“…While for the outflow boundary of block-1, as the scramjet isolator is affected by the back pressure induced by combustion in the combustor, a back pressure boundary condition was generally applied on the exit of the scramjet isolator in a previous study [26].…”

Section: B Computational Model 1 Inlet Geometrymentioning

confidence: 99%

Transient Analysis for Hypersonic Inlet Accelerative Restarting Process

Tang

et al. 2017

Journal of Spacecraft and Rockets

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“…In addition to research on the mechanism, some studies have fo-cused on the factors influencing the oscillation. Su and Zhang (2013) numerically studied the effect of backpressure on self-excited oscillation. The position and structure of the shock train remained stable when the backpressure was low, but oscillations emerged when the backpressure was high.…”

Section: Introductionmentioning

confidence: 99%

Experimental study and analysis of shock train self-excited oscillation in an isolator with background waves

Hou

Chang

Kong

et al. 2020

J. Zhejiang Univ. Sci. A

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A study of shock train self-excited oscillation in an isolator with background waves was implemented through a wind tunnel experiment. Dynamic pressure data were captured by high-frequency pressure measurements and the flow field was recorded by the high-speed Schlieren technique. The shock train structure was mostly asymmetrical during self-excited oscillation, regardless of its oscillation mode. We found that the pressure discontinuity caused by background waves was responsible for the asymmetry. On the wall where the pressure at the leading edge of the shock train was lower, a large separation region formed and the shock train deflected toward to the other wall. The oscillation mode of the shock train was related to the change of wall pressure in the oscillation range of its leading edge. The oscillation range and oscillation intensity of the shock train leading edge were affected by the wall pressure gradient induced by background waves. When located in a negative pressure gradient region, the oscillation of the leading edge strengthened; when located in a positive pressure gradient region, the oscillation weakened. To find out the cause of self-excited oscillation, correlation and phase analyses were performed. The results indicated that the instability of the separation region induced by the leading shock was the source of perturbation that caused self-excited oscillation, regardless of the oscillation mode of the shock train.

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Back-Pressure Effects on the Hypersonic Inlet-Isolator Pseudoshock Motions

Cited by 41 publications

References 17 publications

Effect of back-pressure forcing on shock train structures in rectangular channels

Effect of back-pressure forcing on shock train structures in rectangular channels

Transient Analysis for Hypersonic Inlet Accelerative Restarting Process

Experimental study and analysis of shock train self-excited oscillation in an isolator with background waves

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