Investigations of self-excited vibration in splitter plate with a cavity in the supersonic mixing layer

Li, Hao; Tan, Jianrong; Hou, Juwei; Zhang, Dongdong

doi:10.1016/j.ast.2018.01.009

Cited by 10 publications

(2 citation statements)

References 26 publications

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“…We include the splitter plate in the computational domain to reproduce realistic situation as in our previous experiment. 57 Dual parallel streams encounter in the trailing edge of the splitter plate. Interactions happen and gradually generate a mixing layer whose visualization thickness increases along with the streamwise orientation.…”

Section: A Physical Modelmentioning

confidence: 99%

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Spatial and temporal dynamics of a supersonic mixing layer with a blunt base

2021

AIP Advances

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A supersonic mixing layer with a blunt base is of practical significance to engineering. Two flow configurations with splitter thicknesses of 1 mm (TN) and 5 mm (TK) are simulated using large eddy simulation. The cluster-based network model (CNM) projects the supersonic mixing layer into a ten-centroid based low-dimensional dynamical system. The CNM's outputs of TN and TK cases are compared in order to better understand the spatial and temporal physics. The given baseline case (TN) demonstrates a quasi-steady dynamics with a periodic visit between ten centroids. Each cluster occupies a nearly uniform space region and is also populated with equal probability. The CNM identifies ten centroids associated with these two flow regimes observed in the TK case: Kelvin-Helmholtz vortex and vortex pairing. According to the resolved centroids, increasing the thickness of the splitter plate complicates the flow structures and expands the high-dimensional state space. The CNM presents probable state transitions, revealing that the temporal dynamics in the whole field exhibits highly intermittent behaviors, with large shape modifications but small fluctuations in turbulent kinetic energy. In the near-wake field, the reattachment point and shock wave behave similarly that they move downstream and upstream alternatively. The blunt base supersonic mixing layer, in aggregate, increases the turbulent kinetic energy by 20.5%.

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Section: A Physical Modelmentioning

confidence: 99%

“…The dimensions of the computational domain and flow parameters in this numerical study are inspired from our previous numerical 6,7 and experimental study. 57 Notably, the TK case is the same as our experimental study in the supersonic wind tunnel. 6 The TN case is benchmarked as a baseline.…”

Section: A Physical Modelmentioning

confidence: 99%