Numerical investigation of low-pressure turbine flow control (Invited)

A. Gross, W. Balzer, Hermann F Fasel

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

8 Citations (Scopus)

Abstract

The low-pressure turbine is an important element of modern jet engines. Any performance improvement will lead to net savings in aircraft operating expenses. Experiments showed that separation from low-pressure turbine blades can be controlled by steady and pulsed vortex generator jets and plasma actuators. This paper summarizes numerical simulations that were carried out at the computational fluid dynamics laboratory at the University of Arizona. A two-pronged approach was taken. i) The entire low-pressure turbine blade was studied using a versatile but computationally less efficient multi block code. ii) Separation bubbles under low-pressure turbine conditions on a flat and a curved plate were investigated with a high-order-accurate research code. The first approach allows for simulations of the uncontrolled flow and for investigating active flow control techniques for the entire blade. The grid resolution especially near the actuators is, however, not sufficient for these simulations to be true direct numerical simulations. For the second approach all length scales down to the dissipative length scales were resolved. These well resolved high-fidelity simulations allow in-detail investigations of the relevant physical mechanisms associated with separation control by steady and pulsed vortex generator jets.

Original languageEnglish (US)
Title of host publication38th AIAA Fluid Dynamics Conference and Exhibit
StatePublished - 2008
Event38th AIAA Fluid Dynamics Conference and Exhibit - Seattle, WA, United States
Duration: Jun 23 2008Jun 26 2008

Other

Other38th AIAA Fluid Dynamics Conference and Exhibit
CountryUnited States
CitySeattle, WA
Period6/23/086/26/08

Fingerprint

Flow control
Turbines
Turbomachine blades
Vortex flow
Actuators
Jet engines
Block codes
Direct numerical simulation
Computational fluid dynamics
Aircraft
Plasmas
Computer simulation
Experiments

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Gross, A., Balzer, W., & Fasel, H. F. (2008). Numerical investigation of low-pressure turbine flow control (Invited). In 38th AIAA Fluid Dynamics Conference and Exhibit [2008-4159]

Numerical investigation of low-pressure turbine flow control (Invited). / Gross, A.; Balzer, W.; Fasel, Hermann F.

38th AIAA Fluid Dynamics Conference and Exhibit. 2008. 2008-4159.

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

Gross, A, Balzer, W & Fasel, HF 2008, Numerical investigation of low-pressure turbine flow control (Invited). in 38th AIAA Fluid Dynamics Conference and Exhibit., 2008-4159, 38th AIAA Fluid Dynamics Conference and Exhibit, Seattle, WA, United States, 6/23/08.
Gross A, Balzer W, Fasel HF. Numerical investigation of low-pressure turbine flow control (Invited). In 38th AIAA Fluid Dynamics Conference and Exhibit. 2008. 2008-4159
Gross, A. ; Balzer, W. ; Fasel, Hermann F. / Numerical investigation of low-pressure turbine flow control (Invited). 38th AIAA Fluid Dynamics Conference and Exhibit. 2008.
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