Laminar Boundary Layers and Transition

Lecture  
Date and time: Summer semester, weekly on thursday, 12.45 - 14.15 h
Location: Lecture room H003, Hermann-Blenk-Str. 37
  Hybrid format, i.e. online-participation via BigBlueButtom is possible
Start: Refer to Stud.IP for most recent information. Planned start in summer 2023: 13.4.2023
Lecturer: Dr.-Ing. P. Scholz and Dr.-Ing. Heinrich Lüdeke (DLR)

Note that the official language of the course is german. All supplementary material is in german language.

Exam Dates

Tutorial  
Date and time: Summer semester, weekly on thursday, 14.15 - 15.00
Location: Lecture room H003 and CIP-Pool of ISM, Hermann-Blenk-Str. 37
Start: Refer to Stud.IP for most recent information. Planned start in summer 2023: 20.4.2023
Tutor: Dr.-Ing. P. Scholz

Course Objective

The students acquire in-depth knowledge of the properties of laminar boundary layer and methods for characterization and prediction. They learn about the different mechanisms of laminar-turbulent transition, the accompanying instability processes as well as methods for prediction and, thus, they can asses  and apply these methods for laminar flows and transition prediction.

 

Course Content

- Significance of laminar boundary layers and transition

- Laminar boundary layers: fundamental equations, parameters, exact solutions, similarity solutions, prediction methods for laminar boundary layers

- Transition of plain boundary layers: phenomenology, primary instability theory, Orr-Sommerfeld-equation, prediction of transition in plain 2D boundary layer flows, receptivity, secondary instability theory

- Transition in 3D boundary layers: Extension of stability theory, Squire-theoreme, phenomenology, crossflow vortices, transition prediction for 3D boundary layers, parabolic stability equations, attachment line transition

- Transition in compressible boundary layers

- Numerical simulation of laminar and transitional flows

- Laminar flow control: laminar airfoils, laminar boundary layers with suction