Communications - Scientific Letters of the University of Zilina 2012, 14(11):23-28 | DOI: 10.26552/com.C.2012.4A.23-28

Causes and Solution of Aperiodicity of Supersonic Flow Field Downstream of a Profile Cascade

Martin Luxa1, Jaroslav Synac2, Pavel Safarik3, David Simurda1
1 Institute of Thermomechanics ASCR, v.v.i., Prague, Czech Republic
2 R&D dept., Skoda Power, Pilsen, Czech Republic
3 Czech Technical University in Prague, Prague, Czech Republic

The paper deals with problems of transonic flow field periodicity downstream of a profile cascade with finite number of blades. The origin of phenomena generating this aperiodicity in transonic wind tunnel is described. The solution of this problem by means of adjustable perforated tailboard is documented by results of optical measurements (interferometry, schlieren methods) on a turbine profile cascade consisting of six blades only. The conditions of formation of limit load regime are described.

Keywords: turbine cascade, exit flow periodicity, transonic flow, porous tailboard, limit load

Published: December 31, 2012  Show citation

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Luxa, M., Synac, J., Safarik, P., & Simurda, D. (2012). Causes and Solution of Aperiodicity of Supersonic Flow Field Downstream of a Profile Cascade. Communications - Scientific Letters of the University of Zilina, 14(4A), 23-28. doi: 10.26552/com.C.2012.4A.23-28
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