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I studied a paper about turbine and i seen that there is negative static pressure in contour. Why does this happen?

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Wave Energy Harvesting Turbine: Performance Enhancement

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    $\begingroup$ If you have studied a paper, then at least post a reference to that paper. $\endgroup$ – Nick Alexeev Oct 30 '16 at 15:17
  • $\begingroup$ Was it a "wake" region? $\endgroup$ – Algo Oct 30 '16 at 16:16
  • $\begingroup$ I place reference... no it wasn't....It is near to stagnation point of blade. $\endgroup$ – user19061 Oct 30 '16 at 17:15

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