TY - JOUR
T1 - Transition of boundary layer flows with application to turbomachinery airfoils
AU - Simon, Terrence W.
AU - Jiang, Nan
PY - 2009
Y1 - 2009
N2 - In this review, we focus on transition in turbomachinery. Thus, of the vast literature on transition, we discuss cases in which disturbance levels are high and, in particular, major disturbances are from passing wakes from upstream airfoils. We use some experimental data with which we are especially familiar to discuss the transition process. One reason for taking these data is to assess transition models used in design. Since the models were developed from data sets taken without wakes, we test whether they can be applied in a quasi-steady way to flows with wakes. We find that transition onset, especially separated flow transition onset, can be modelled in such a way under turbomachinery conditions, but the transition path cannot. Next, we introduce our present activity, an attempt to influence transition in a way that capitalizes on the effects of wakes on transition.
AB - In this review, we focus on transition in turbomachinery. Thus, of the vast literature on transition, we discuss cases in which disturbance levels are high and, in particular, major disturbances are from passing wakes from upstream airfoils. We use some experimental data with which we are especially familiar to discuss the transition process. One reason for taking these data is to assess transition models used in design. Since the models were developed from data sets taken without wakes, we test whether they can be applied in a quasi-steady way to flows with wakes. We find that transition onset, especially separated flow transition onset, can be modelled in such a way under turbomachinery conditions, but the transition path cannot. Next, we introduce our present activity, an attempt to influence transition in a way that capitalizes on the effects of wakes on transition.
KW - Laminar-to-turbulent transition
KW - Low pressure turbines
KW - Unsteady boundary layer
KW - Wake
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U2 - 10.1615/JEnhHeatTransf.v16.i3.10
DO - 10.1615/JEnhHeatTransf.v16.i3.10
M3 - Article
AN - SCOPUS:68649124549
SN - 1065-5131
VL - 16
SP - 205
EP - 223
JO - Journal of Enhanced Heat Transfer
JF - Journal of Enhanced Heat Transfer
IS - 3
ER -