Key points are not available for this paper at this time.
The transition in the hypersonic boundary layer represents a pivotal area of interest within the fluid mechanics community. This talk provides a review of the recent advancements in hypersonic boundary-layer transition studies, encompassing research facilities and experimental methodologies. It introduces the hypersonic quiet wind tunnel as an essential tool for acquiring near-space real flight data. Techniques for near-wall measurement, including temperature-sensitive paint, near-wall particle image velocimetry, infrared thermography, and Rayleigh-scattering visualization, are explored. The talk addresses critical issues in hypersonic boundary layer transitions, focusing on the instability and nonlinear interaction among various instability modes. It proposes the phase-locked mechanism of these instability modes and introduces a novel principle of aerodynamic heating in hypersonic flows. Additionally, it thoroughly discusses the structural formation of boundary layers over flat plates, sharp cones, flared cones, and delta wings.
Cunbiao Lee (2024) studied this question.