Direct Numerical Simulation of Crossflow Instability Excited by Microscale Roughness on HIFiRE-5

Dinzl, Derek; Candler, Graham V.

doi:10.2514/6.2016-0353

Cited by 5 publications

(1 citation statement)

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“…It is expected that the crossflow instability is present in flight. Stationary crossflow exhibits early nonlinear effects with a strong dependence on surface roughness and receptivity [16][17][18]. Although it is predicted to have higher growth rates, traveling crossflow is not observed to be the dominant mechanism in a low-disturbance environment.…”

Section: A Background and Motivationmentioning

confidence: 99%

Preflight Ground Test Analyses of the Boundary Layer Transition (BOLT) Flight Geometry

Kostak

Bowersox

2021

Journal of Spacecraft and Rockets

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heating was quantified using infrared thermography. Under quiet conditions, heat flux was characterized by a streak structure with no transition observed. Transition was observed within the conventional noise ACE facility in two regions: 1) in the vicinity of a mixed-mode structure and 2) in an outboard traveling crossflow region. The flow structure within a coherent vortex rollup located off centerline was further characterized under quiet flow conditions with constant-temperature hot-wire anemometry and high-frequency surface-pressure spectra. The measured mean and disturbance flow structure were in qualitative agreement with the simulations. The hot-wire spectral content showed growth in the 25-40 kHz range, which also agreed with the simulations. Surface-pressure spectral results showed similar growth in the 25-50 kHz range observed under both quiet and conventional freestream conditions.

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Section: A Background and Motivationmentioning

confidence: 99%