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To control secondary flows,streamwise fences were attached to end wall of a linear turbine rotor cascade.Thecascade had 8 blades of 400 mm long and 175 mm chord.The blades deflected the flow by 120°.The fences weremade out of 0.7 nun thick brass sheet and the heights of the fences were 14 mm,18 mm respectively.The curva-ture of the fences was the same as that of the blade camber line.The fences were fixed normal to the end wall andat half pitch away from the blades.The experimental program consists of total pressure,static pressure measure-ments at the inlet and outlet of the cascade,by using five-hole probe.In addition,static pressure on the blade suc-tion surface and pressure surface was also obtained. Fences are effective in preventing the movement of the pres-sure side leg of the horseshoe vortex.Consequently the accumulation of low energy fluid on the suction surface isminimised.End wall losses are reduced by the fences due to weakening of the end wall cross flow.
To control secondary flows, streamwise fences were attached to end wall of a linear turbine rotor cascade. The cascade had 8 blades of 400 mm long and 175 mm chord.The blades deflected the flow by 120 °. The fences were made out of 0.7 nun thick brass sheet and the heights of the fences were 14 mm, 18 mm respectively. The curva-ture of the fences was the same as that of the blade camber line. The fences were fixed normal to the end wall andat half pitch away from the blades. The experimental program consists of total pressure, static pressure measure-ments at the inlet and outlet of the cascade, by using five-hole probe. In addition, static pressure on the blade suc-tion surface and pressure surface was also obtained. Fences are effective in preventing the movement of the pres-sure side leg of the horseshoe vortex. Conclusion of the accumulation of low energy fluid on the suction surface is minimized. End wall losses are reduced by the fences due to weakening of the end wall cross flow.