What is it about?
Surface morphing is an efficient way to increase the aerodynamic performance of aircrafts. In this paper, we choose a representative morphing structure, an extending wall, and particularly focus on its impact on the laminar-turbulent transition. Two distinguished regimes are studied theoretically.
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Why is it important?
We quantify the two regimes of the morphing-wall effects on transition by two system parameters. This is rather important because (1) these system parameters reavel the intrinsic physics of the interaction ofthe morphing wall with the oncoming perturbations, and (2) we are able to construct a transition-prediction approach based on these system parameters.
Perspectives
I think that this aritical is an exciting advanture on probing the mechanisms by which the morphing-wall effect influences the laminar-turbulent transition, because thanks to the asymptotic analysis, we are able to show the dependence of the morphing-wall effect on the reduced-number controlling parameters, and the mathematical details are elegant . I hope the readers would also enjoy the physical observations behind the mathematical descriptions.
Ming Dong
Institute of Mechanics, Chinese Academy of Sciences
Read the Original
This page is a summary of: Impact of a continuously extending wall on laminar-turbulent transition in subsonic boundary layers, Physics of Fluids, August 2022, American Institute of Physics,
DOI: 10.1063/5.0106736.
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