Unsteady Flow Evolution Through a Turning Midturbine Frame Part 2: Spectral Analysis

2015 ◽  
Vol 31 (6) ◽  
pp. 1597-1606 ◽  
Author(s):  
D. Lengani ◽  
R. Spataro ◽  
J. Peterleithner ◽  
E. Göttlich
Keyword(s):  
Spectral Analysis ◽  
Unsteady Flow ◽  
Flow Evolution

Unsteady Flow Evolution Through a Turning Midturbine Frame Part 1: Time-Resolved Flow

2015 ◽  
Vol 31 (6) ◽  
pp. 1586-1596
Author(s):  
D. Lengani ◽  
R. Spataro ◽  
B. Paradiso ◽  
E. Göttlich
Keyword(s):  
Unsteady Flow ◽  
Time Resolved ◽  
Flow Evolution

Unsteady flow evolution in swirl injector with radial entry. I. Stationary conditions

2005 ◽  
Vol 17 (4) ◽  
pp. 045106 ◽  
Author(s):  
Shanwu Wang ◽  
Shih-Yang Hsieh ◽  
Vigor Yang
Keyword(s):  
Unsteady Flow ◽  
Swirl Injector ◽  
Flow Evolution ◽  
Stationary Conditions

Hot-Wire Measurements in a High Speed Counter Rotating Turbo Fan Rig

2010 ◽  
Author(s):  
Robert Meyer ◽  
Karsten Knobloch ◽  
Johannes Linden
Keyword(s):  
Spectral Analysis ◽  
Flow Field ◽  
Unsteady Flow ◽  
Rotor Blade ◽  
High Speed ◽  
Flow Structures ◽  
Hot Wire ◽  
Rotating Blades ◽  
Mean Vectors ◽  
German Aerospace

The German Aerospace Center (DLR) has measured the unsteady flow field of a high speed Contra-Rotating Turbo Fan (CRTF). In order to perform the measurement, hot-wire probes were placed upstream of the first rotor, between both rotors and downstream of the second rotor. With the DLR hot-wire measuring technique, unsteady flow structures (e.g. the wake of each individual rotor blade) were measured and analyzed in detail. The averaged mean vectors as well as the fluctuation components of the velocity were determined. The calculated local turbulence distribution of the flow downstream of the rotating blades shows an increase of the turbulence intensity of 3% in the wake. With the phase-locked averaging and the spectral analysis an upstream effect of the rotor 2 was verified.

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