DocumentCode :
3230951
Title :
Whole-field visualisation and velocity measurement of an instantaneous transonic turbine flow
Author :
Cross, P. Bryanston ; Udrea, D.D. ; Guenette, G. ; Epstein, A. ; d´Hoop, E.M.
Author_Institution :
Dept. of Eng., Warwick Univ., Coventry, UK
fYear :
1997
fDate :
29 Sep-2 Oct 1997
Firstpage :
278
Lastpage :
286
Abstract :
The work described in this paper represents a premiere in the application of Particle Image Velocimetry (PIV) to turbomachinery flows. This technique allowed the visualisation of the instantaneous transonic flow in the inter-blade passage of a rotating annular cascade at engine conditions. By means of photographic recording of flow tracers and specialised image processing, the instantaneous velocity over the whole field was measured with estimated accuracy between 2 and 5%. Furthermore, the vorticity map was created by means of differentiation and linear interpolation on a Delaunay triangular grid. From the superposition of sequential frames, a steady state velocity map was reconstructed
Keywords :
aerospace engines; aerospace testing; flow visualisation; gas turbines; particle velocity analysis; transonic flow; velocity measurement; vortices; Delaunay triangular grid; engine conditions; flow tracers; instantaneous transonic turbine flow; instantaneous velocity; inter-blade passage; linear interpolation; particle image velocimetry; rotating annular cascade; sequential frame superposition; turbomachinery flows; velocity measurement; vorticity map; whole-field visualisation; High speed optical techniques; Image motion analysis; Laboratories; Optical distortion; Optical interferometry; Optical scattering; Optical sensors; Turbines; Velocity measurement; Visualization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Instrumentation in Aerospace Simulation Facilities, 1997. ICIASF '97 Record., International Congress on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-7803-4167-8
Type :
conf
DOI :
10.1109/ICIASF.1997.644690
Filename :
644690
Link To Document :
بازگشت