Have you tried the method described in the picture in the following study, I think you can easily do it by holding and dragging with the left mouse button: Chapter Design of Zero Head Turbines for Power Generation

I've provided the image here. So this's what I'm trying to achieve.

But whenever I try to link the solution of Static structural to the results of Fluid flow (Fluent), it doesn't seems to respond.

While linking ANSYS modules, our aim should be to add the load/support conditions and linear/non-linear static analysis results, to the "setup" part of other modules. So I think you must link the "results" of st structural to the "setup" line of fluid-flow, not to results of it.