Understanding of hydrodynamics involved in the ow around tidal turbines is essential to enhance their performance and resilience, as they are designed to operate in harsh marine environments. During their lifespan, they are subjected to high velocities with large levels of turbulence that demand their design to be greatly optimised.Experimental tests have provided valuable information about the performance of tidal stream devices but these are often conducted in constricted umes featuring turbulent ow conditions dierent to those found at deployment sites. Additionally, measuring velocities at prospective sites is costly and often dicult.