Delaying hypersonic boundary layer transition using forward-facing step arrays: An experimental work
| العنوان: | Delaying hypersonic boundary layer transition using forward-facing step arrays: An experimental work |
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| المؤلفون: | Xiwang Xu, Shihe Yi, Pengcheng Quan, Xiaoge Lu, Junhao Han |
| المصدر: | Physics of Fluids. 34:065128 |
| بيانات النشر: | AIP Publishing, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Fluid Flow and Transfer Processes, Mechanics of Materials, Mechanical Engineering, Computational Mechanics, Condensed Matter Physics |
| الوصف: | Our previous research has demonstrated that a single forward-facing step (FFS) could delay the hypersonic boundary layer transition on a cone [Xu et al., “Influences of steps on the hypersonic boundary-layer transition on a cone,” AIAA J. 59, 439–446 (2021)]. This paper aims to further this study by investigating the control effects of FFS arrays on the hypersonic boundary layer transition on a 7° half-angle sharp cone. Experiments are conducted in a Mach 6 wind tunnel using nano-tracer-based planar laser scattering techniques and high-frequency pressure sensors. Cases with smooth surfaces, single FFS, or FFS arrays with different spacing and step heights are studied for comparison. The results show that FFS arrays present a better performance on stabilizing the second mode wave and delaying the transition than a single FFS. Notably, the spacing and height between and of the steps also play an important role in the delay effect. For the cases studied, a better control effect can be achieved using FFS arrays spaced at a larger distance or with step height increasing along the flow direction. Moreover, FFS arrays could restabilize the second mode wave that has been amplified by the upstream backward-facing step. |
| تدمد: | 1089-7666 1070-6631 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::ec807fa0a6af35eb731e6f0147897842 https://doi.org/10.1063/5.0094755 |
| رقم الأكسشن: | edsair.doi...........ec807fa0a6af35eb731e6f0147897842 |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 10897666 10706631 |
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