The effect of full coverage winglets on tip leakage aerodynamics over the plane tip in a turbine cascade

Tip leakage aerodynamics over the cavity squealer tip equipped with full coverage winglets in a turbine cascade

“…The test rig employed in this investigation is the same as that used by Lee et al (2014), except that their plane tip is replaced by the cavity squealer tip (Fig. 2).…”

“…Each FC winglet in Fig. 2 has a geometrical shape identical to that tested by Lee et al (2014). Its width and thickness are constant all over the perimeter.…”

“…The present 5-hole probe instrumentation system is the one employed by Lee et al (2014). A cone-type five-hole probe as shown in Fig.…”

“…5 are very similar to those for the plane tip equipped with the FC winglet . Lee et al (2014) provided more detailed flow descriptions underneath the FC winglet.…”

“…They showed that with increasing the radius of the pressure-side edge, the tip leakage mass flow rate and the loss increase. Lee et al (2014) studied the effect of full coverage (FC) winglets on tip leakage aerodynamics over the plane tip in a turbine cascade for h/s = 1.36%. They showed that with an increment of w/p, the total pressure loss coefficient mass-averaged all over the measurement plane, C Pt , decreases steeply up to w/p = 10.55% and then becomes almost unchanged, as can be seen in Fig.…”