Abstract
An experimental and computational study is conducted to develop a model for the effects of surface steps on transition to turbulence in boundary layers. The step effects are captured within the framework of a variable n-factor method, where the step results in a reduction in the TS-wave transition n-factor ΔN TS . Data is presented for NTS for favorable and adverse pressure gradients. Backward-facing steps result in significantly larger reductions in the transition n-factor when compared to forward-facing steps. The results show that step effects can be accounted for by using a ΔN TS for step heights up to 1.5 times the local boundary-layer displacement thickness.
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Crouch, J., Kosorygin, V., Ng, L. (2006). MODELING THE EFFECTS OF STEPS ON BOUNDARY-LAYER TRANSITION. In: Govindarajan, R. (eds) IUTAM Symposium on Laminar-Turbulent Transition. Fluid Mechanics and Its Applications, vol 78. Springer, Dordrecht. https://doi.org/10.1007/1-4020-4159-4_4
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DOI: https://doi.org/10.1007/1-4020-4159-4_4
Publisher Name: Springer, Dordrecht
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