Influence of a forward-facing step on crossflow instability and transition

An experimental study in a swept wing boundary-layer

Doctoral thesis (2022)

Authors

A.F. Rius Vidales Aerodynamics - Aerospace Engineering
Research Group
Aerodynamics (Aerospace Engineering) (TU Delft)
Copyright: © 2022 A.F. Rius Vidales
DOI: https://doi.org/10.4233/uuid:6fd8a152-ab7a-4ecd-a817-61945d431bef
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Published Date

2022

Language

English

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Faculty

Aerospace Engineering

Department

Flow Physics and Technology

Research Group

Aerodynamics

Abstract

The market growth expected for commercial aviation in the coming decades and the increasing social awareness regarding the effects of global warming are driving significant technological developments necessary for emission reduction in future transport aircraft. From the aerodynamics perspective, a significant increase in aircraft efficiency can be obtained by applying Laminar Flow Control (LFC) techniques. The objective of LFC techniques is to reduce the skin-friction drag component by delaying the laminar-turbulent transition through the stabilisation of boundary-layer instabilities. Relevant to high-subsonic transport aircraft is the development of Crossflow (CF) instability, which manifests as a series of co-rotating vortices inside the boundarylayer flow on swept aerodynamic surfaces...