Universität Stuttgart - Fakultät Luft-und Raumfahrttechnik und Geodäsie // Aerospace Engineering Department



Dr.-Ing. Markus J. Kloker   

Institut für Aerodynamik und Gasdynamik
Team "Transition und Turbulenz"
Pfaffenwaldring 21
D-70550 Stuttgart
Line +49 711 685 -63427 (Phone) -63438 (Fax)
kloker@iag.uni-stuttgart.de





Lehre // Lectures

Strömungsinstabilitäten und Laminar-Turbulenter Übergang //
Flow Instability and Laminar-Turbulent Transition
* Kurzvorstellung der Vorlesung
* Vorlesungsmaterial, inkl. Gliederung (2.5MB)
* Vorlesungsmaterial Kompressible LST (UA-Beitrag, 1.6MB)
* Aktuelles

Hyperschallströmung und -flug //
Hypersonic flow
* Kurzvorstellung der Vorlesung
* Vorlesungsmaterial, inkl. Gliederung, exkl. Einführungsvortrag (5.0MB)
* Einführungsvortrag (2.2MB)
* Spezielle Literatur zur Vorlesung (12.0MB)
* Aktuelles

Numerische Verfahren: Finite-Differenzen-Verfahren hoher Genauigkeit //
Fundamentals of high-order computational fluid dynamics - Finite-Difference Schemes
* Kurzvorstellung der Vorlesung
* Diagrammkataloge zum Lösungsverhalten von Finite-Differenzen-Zeitschrittverfahren
   diagram catalogues: solution behaviour of various finite-difference time marching schemes
   Katalog 1: G-DGL-Löser (2.1MB)
   Katalog 2: FDs - exp(ikx) (1.3MB)
   Katalog 3: FDs - exp( kx) (1.0MB)
* Vorlesungsmaterial, inkl. Gliederung, exkl. Diagrammkataloge und Animationen (1.1MB)
* Animationen numerischer Lösungen der Diffusionsgleichung (Couette-Anlaufströmung) (2.8MB)
* Animationen numerischer Lösungen der Advektionsgleichung (7.0MB)
* Spezielle Literatur zur Vorlesung (6.0MB)
* Aktuelles

Integriertes Auslandsstudium an der University of Arizona, Tucson, USA, im Masterstudium bei Wahl der Spezialisierungsrichtungen A, B mit Strömungslehremodulen
* Informationen zum ISAP-Programm mit der UA

Bachelor-/Masterarbeiten und Doktorandenstellen ausser gemäss Ausschreibung (s. IAG-Seite oder diese Seite oben) auch auf Anfrage; es bestehen auch bewährte Kontakte zu Stellen im Ausland, z.B. USA.

Main Research Topics

Spatial direct numerical simulation of flow instability - 3-d base flows
Stability theory with 1-d and 2-d eigenfunctions
Laminar-turbulent transition - laminar flow control - suction, blowing, roughness, plasma actuators
Disturbance receptivity and its control
Eco-Efficient Flight, Environmentally Responsible Aviation
Hypersonic boundary layers - 1.-mode/2.-mode/streak instabilities, roughness
Wall and film cooling in super-/hypersonic flow
Flow induced sound, sound control, and global instability
Active flow control

Selected Animations of Results


Hypersonic transition induced by a discrete oblique roughness element and a biharmonic point source upstream of it (Ma=4.8, to RTO-paper 2012, 6.8Mb)

Hypersonic instability induced by a discrete oblique roughness element (Ma=4.8, biglobal stability theory, to RTO-paper 2012, 6.7Mb)

Crossflow-vortex induced transition and pinpoint suction (case 9-H of JFM-2012, vol. 706, 43.0Mb)

Crossflow transition and control scenarios (to JFM 456, 483, 530 (2002, 2003, 2005), 3.0Mb)

Evolution of vortical structures in APG boundary-layer transition (to Appl.-Sci.-Res.-paper 1998, 34.5Mb)

Evolution of vortical structures in ZPG and APG boundary-layer transition (to IUTAM-Sendai paper 1993/5, 120Mb)

Hypersonic laminar-turbulent transition (to papers WEHSFF-/EMC-2002, SFB-259-2005, 10Mb)



Selected Publications A - Subsonics

(click here for the complete formatted publication list)

2012

Detuned resonances of Tollmien-Schlichting waves in airfoil boundary layer: experiment, theory, and direct numerical simulation (Phys. Fluids, 2.1Mb)

Control of the secondary crossflow instability using localized suction (JFM, 2012, 1.8Mb)

Numerical investigation of rotational augmentation for S822 wind turbine airfoil (Wind Energy, Wiley, 1.0Mb)

2011

Nonlinear instabilities of a non-self-similar boundary layer on an airfoil: experiments, direct numerical simulation, and theory (Europ. J. Mech B/Fluids, 2.6Mb)

Control of crossflow-vortex-induced transition: DNS of pinpoint suction (AIAA-2011, Hawaii, 2.0Mb)

Laminar flow control in vortex-deformed swept-wing flows: pinpoint suction (HLRS Golden Spike 2010, inSiDE-2011, 2.7Mb)

DNS of swept-wing laminar flow control by pinpoint suction (HPCSE-10, 2011, 4.0Mb)

Numerical simulation of crossflow-transition control using pinpoint suction (STAB-10, 2011, 2.0Mb)

2010

Investigation of suction for laminar flow control of three-dimensional boundary layers (JFM, 2010, 1.7Mb)

On the odd and even secondary instabilities of Görtler vortices (draft 2010, 4.0Mb)

Numerical investigation of S822 wind turbine airfoil (AIAA-2010, Chicago, 3.7Mb)

2009

Direct numerical simulation of the mixing layer past serrated nozzle ends (IUTAM-LTT-Stockholm 2009/2010, 2.3 Mb)

Mechanisms and active control of jet-induced noise (NNFM-104, DFG-CNRS-FOR summary 2008, 9.5 Mb)

Accuracy analysis of finite-difference methods on non-uniform grids ( IAG internal report, 0.9 Mb)

2008

Advanced laminar flow control on a swept wing - useful crossflow vortices and suction (AIAA-2008, Seattle, 1.0Mb)

Localized blowing and suction for direct control of the crossflow secondary instability (AIAA-2008, Seattle, 2.4Mb)

Direct numerical simulation of a square-notched trailing edge for jet-noise reduction (AIAA-2008, Reno, 3.7Mb)

DNS of a plane mixing layer for the investigation of sound generation mechanisms (Comput.& Fluids, 1.2Mb)

2007

Secondary instability of crossflow vortices: validation of the stability theory by DNS (JFM, 2007, 1.2Mb)

2006

DNS of shear-flow phenomena on parallel vector computers (HPCVS, 2005, 6.5Mb)

2005

Experimental study of resonant interactions of instability waves in an airfoil boundary layer (IUTAM-LTT-Bangalore 2004/2005, 0.3 Mb)

Transition mechanisms in a 3-d boundary-layer flow with pressure-gradient changeover (JFM, 2005, 1.9Mb)

DNS study of spatial discrete suction for Laminar Flow Control (HPCSE-04, 2005, 1.1Mb)

2004

Effects of spatial discrete suction on a 3-d boundary layer investigated by DNS (Poster, 2004)

2003

Transition mechanisms induced by travelling crossflow vortices in a 3-d boundary layer (JFM, 2003, 0.5Mb)

Secondary instability of superposed steady and unsteady crossflow vortices (NNFM 87, 2003, 2.0Mb)

DNS study of discrete suction in a 3-d boundary-layer flow (NNFM 86, 2003, 1.0Mb)

Investigation of the flow randomization process in a transitional boundary layer (HPCSE-03, 2003, 1.4Mb)

3-d steady disturbance modes in the Blasius boundary layer - a DNS study (with addendum, 2004) (NNFM 86, 2003, 0.6Mb)

2002

3-d boundary-layer transition induced by superposed steady and travelling crossflow modes (HPCSE-02, 2002, 4.8Mb)

Mechanisms and passive control of crossflow-vortex-induced transition in a 3-d boundary layer (JFM, 2002, 1.9Mb)

DNS of transitional boundary-layer flows at sub- and hypersonic speeds (DGLR, 2002, 0.6Mb)

DNS of transitional boundary-layer flows at sub- and hypersonic speeds (DGLR, 2002, Presentation),

2001

Experimental and numerical investigations of controlled transition in low-speed free flight (AST, 2001, 2.0Mb)

DNS of laminar-turbulent transition in a 3-d aerodynamics boundary-layer flow (HPCSE, 2000, 1.3Mb)

2000

DNS investigations of the development and control of crossflow vortices in a 3-d boundary-layer flow (IUTAM-LTT-Sedona, 1999/2000, 4.4Mb)

Three-dimensional-boundary-layer transition phenomena investigated by spatial direct numerical simulation (IUTAM-LTT-Sedona, 1999/2000, 1998, 1.1Mb)

Navier-Stokes simulation of harmonic point disturbances in an airfoil boundary layer (AIAA-Journal, 2000, 0.8Mb)

1999

Spatial Navier-Stokes simulation of crossflow-induced transition in a three-dimensional boundary layer: steady/unsteady interaction (NNFM, 1998, 2.8Mb)

1998

A robust high-resolution split-type compact FD scheme for spatial DNS of boundary-layer transition (Appl. Sci. Res., 1998, 0.4Mb)

1996

Effect of discrete suction strips on the stability of 3-d boundary layers - DNS vs. BL modelling (CEAS, Bordeaux, 1996, 0.5Mb)

1995

DNS of boundary-layer transition with strong APG (IUTAM Sendai, 1995, 1.5Mb)

1994

Evolution of coherent structures in boundary layers with and without pressure gradient using POD (ECCOMAS, 1994, 2.1Mb)

1993

Direkte numerische Simulation des laminar-turbulenten Strömungsumschlages in einer stark verzögerten Grenzschicht (Dissertation 1993, 42.2Mb)

Outflow BCs for spatial DNS of transition boundary layers (AIAA-Journal, 1993, 1.3Mb)




Selected Publications B - Super-/Hypersonics

(click here for the complete formatted publication list)

2012

Stability analysis of three-dimensional hypersonic boundary-layer flows with discrete surface roughness (RTO-MP-AVT-200, 6.4Mb)

Influence of boundary-layer turbulence on effusion cooling at Mach 2.67 (SFBTRR40 ann. report, 1.5Mb)

2011

Influence of a favorable streamwise pressure gradient on laminar film cooling at Mach 2.67 (EUCASS, St. Petersburg, 7.7Mb)

Temperature / rarefaction effects in hypersonic boundary-layer flow with an oblique roughness element (AIAA-2011, Hawaii, 6.0 Mb)

Numerical simulation of laminar film cooling in a supersonic boundary layer using modeled and simulated blowing (SFBTRR40 ann. report, 1.8Mb)

Effects of local wall heating and cooling on hypersonic boundary-layer stability (SFBTRR40 summer res. progr., Munich, 3.1Mb)

Effects of wall-temperature conditions on effusion cooling in a Mach 2.67 boundary layer (AIAA-J. accepted, 2.6 Mb)

2010

Hypersonic flows with discrete oblique surface roughness and their stability properties (CTR-SRP-2010, Stanford, 4.8 Mb)

Effects of inclined blowing on effusion cooling in a Mach-2.67 boundary layer (SFBTRR40 ann. report, 1.7Mb)

2009

Investigation of thermal nonequilibrium on hypersonic boundary-layer transition by DNS (IUTAM-LTT-Stockholm 2009/2010, 0.2 Mb)

Bi-global crossplane stability analysis of high-speed boundary-layer flows with discrete roughness (IUTAM-LTT-Stockholm 2009/2010, 1.5 Mb)

2008

Bi-global stability theory for high-speed boundary layers (CTR-SRP-2008, Stanford, 3.8 Mb)

Chemical nonequilibrium effects in the wake of a boundary-layer sized object in hypersonic flows (CTR-SRP-2008, Stanford, 1.7 Mb)

Numerical investigations of film cooling and its influence on the hypersonic boundary-layer flow (NNFM 98, RESPACE, 2008, 2.2Mb)

2007

Numerical investigation of hypersonic wall-bounded shear flows: part 1 - effusion cooling (ERCOF-BULL, 2007, 1.0Mb)

Numerical investigations of effusion cooling in hypersonic boundary-layer flow (NNFM 96-STAB/DGLR, 2007, 1.4Mb)

2006

DNS of shear-flow phenomena on parallel vector computers (HPCVS, 2005, 6.5Mb)

2005

DNS of laminar-turbulent transition in the low hypersonic regime (SFB259-04-WILEY-VCH, 2005, 3.1Mb)

2002

DNS of transition mechanisms at Mach 6.8 - flat plate and sharp cone (EMC-02, 2002, 0.5Mb)

DNS of transition mechanisms at Mach 6.8 - flat plate vs. sharp cone (WEHSFF, 2002, 0.7Mb)

DNS of transitional boundary-layer flows at sub- and hypersonic speeds (DGLR, 2002, 0.6Mb)

DNS of transitional boundary-layer flows at sub- and hypersonic speeds (DGLR, 2002, Presentation),

2001

SFB-Zwischenbericht: Grenzschichtumschlag bei Überschallströmung - Kreiskegelgrenzschicht (SFB259, 2001, 0.7Mb)

2000

Spatial DNS of transition phenomena in supersonic flat-plate boundary layers (IUTAM-LTT-Sedona, 1999/2000, 1.0Mb)

1999

Transition processes in Mach 6.8 boundary layers at differing temperature conditions investigated by spatial DNS (NNFM, 1998, 0.9Mb)

1998

SFB-Zwischenbericht: Grenzschichtumschlag bei Überschallströmung - Plattengrenzschicht (SFB259, 1998, 3.7Mb)


Funnies

What is an "incompressible investigator"?
One that can take pressure without dilating.

I am not exactly a rocket engineer.
(I am also doing work in aeronautics).

Once you get rid of integrity the rest is a piece of cake.
(It will be far more than a piece.)
Don't cakes ruin your teeth?

The early bird catches the worm. But: The second mouse gets the cheese.

Übrigens:
Wenn Sie eine Stelle im ingenieurwissenschaftlichen Bereich der baden-württembergischen Universitäten entdecken, wo die geforderte national und international leuchtende und transparent zu erbringende Lehr- und Forschungsleistung angemessen bezahlt wird, dann ...
... haben Sie geträumt.
Mir sparet au da.
(Ällerdengs fascht nix bei Beamde.)

Kein Witz:
Habilitation ist ...
... was für Anhänger von Kaiser Wilhelm II.

Truth

Caution: This page may contain traces of facts.

Nur wer gegen den Strom schwimmt merkt es.
Only moving against the stream lets you know it.

Die Zukunft früher oder später sie kommt.
The future sooner or later happens.

Zwei Dinge sind unendlich, das Universum und die menschliche Arroganz. Aber beim Universum bin ich mir nicht ganz sicher.
Two things are unbounded: the universe and human arrogance. But as for the universe, I am not quite sure.
Based on Albert Einstein

Public Relations

Suction with vortex seeding for laminar flow control
Short description in Supercomputing Journal inSiDE 2007: Smart Suction
Pressemitteilung der Universität (in German)
Pressemitteilung SPIEGEL Online
Artikel in "Bild der Wissenschaft"
Interview im Stuttgarter Hochschulradio HoRadS, 11. Juni 2007, im MP3-Format, 22 Minuten (24MB)