Direct numerical simulations of laminar-turbulent transition for transonic boundary layers

Christoph Hader, Ning Deng, Michael Woodward, Hermann F. Fasel

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Direct Numerical Simulations (DNS) were carried out to investigate laminar-turbulent boundary-layer transition on a 5 opening half-angle straight (right) cone with a sharp nose tip at zero angle of attack for the transonic flow regime (M = 0.8 − 1.2). The cone geometry and flow conditions of the in-flight transition experiments by the National Aeronautics and Space Administration (NASA) were used for the numerical investigations. Linear Stability Theory (LST) analysis has shown that strongly amplified axisymmetric and oblique disturbance waves exist for the flow conditions investigated here. A highly-resolved three-dimensional DNS for M = 1.08 of a wave packet, initiated by a short duration pulse via a blowing and suction hole at the wall, demonstrated that a fully developed turbulent spot develops rapidly (over a short downstream distance) from a short-duration pulse disturbance. Results from the DNS of the nonlinear wavepacket and turbulent development are presented and discussed in this paper.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2021 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Pages1-12
Number of pages12
ISBN (Print)9781624106095
StatePublished - 2021
EventAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021 - Virtual, Online
Duration: Jan 11 2021Jan 15 2021

Publication series

NameAIAA Scitech 2021 Forum

Conference

ConferenceAIAA Science and Technology Forum and Exposition, AIAA SciTech Forum 2021
CityVirtual, Online
Period1/11/211/15/21

ASJC Scopus subject areas

  • Aerospace Engineering

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