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START Program Y0057-TEC "Non-Intrusive Measurement of Turbulence in Turbomachinery"
Program sponsored by the Federal Ministry of Science and Transport
BMWV and the Austrian Science Foundation
FWF
Program Start: 1997; Program End: 2000
Program Applicant / Contact: Dr.
Jakob Woisetschläger
Objective: The research objective of the proposed program is the improvement
of turbulent flow modelling in gas and steam turbomachinery by non-intrusive optical flow
diagnostics. Since the flow physics in turbomachinery includes laminar-turbulent transitional
flows, rotational forces, fully three-dimensional flows, pronounced pressure gradients in all
directions, vortices, secondary flows, subsonic and transonic conditions, unsteady phenomena
like wake passing and often two-phase flows (steam and water, gas and particles), the turbine
gas flow is an ultimate test for turbulent flow calculation. Differences in predicted and measured
efficiencies in turbomachinery are believed to be caused by the empirical input to numerical
models still needed to represent the turbulent nature of flow. These differences are large enough
for not being able to replace expensive experimental tests by numerical calculation process.
The proposed program attacks this problem by the use and development of non-intrusive optical
diagnostic techniques for turbulent flows in turbomachinery.
See also: Optical Metrology
at the Institute for Thermal Turbomachinery and Machine - Dynamics
Schedule and connection between projects (JPEG 125 kB)
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Graz University of Technology