11th European Conference on Turbomachinery Fluid dynamics & Thermodynamics
Wake flow measurements and multi-colored oil flow visualizations were performed in a 2D linear stator compressor cascade for tandem configurations. Two sets of tandem vanes with different load split (LS) are compared to a set of conventional single vane reference blades. The measurements were performed at a Mach number of 0.6 and a Reynolds number of 900.000. During the experiments the tangential displacement (percent pitch PP) is varied from 85% to 95% for the tandem blade configurations. The results of the oil flow visualization in addition with wake flow measurements show how the secondary flow structures develop and change with varying tangential displacement.