Q.1 The power output (P) of a marine current turbine is assumed to be a function of current velocity U, blade length L,

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Q 1 The Power Output P Of A Marine Current Turbine Is Assumed To Be A Function Of Current Velocity U Blade Length L 1 (149.54 KiB) Viewed 31 times

Q.1 The power output (P) of a marine current turbine is assumed to be a function of current velocity U, blade length L, angular velocity w, fluid density p and kinematic viscosity v. a) Use dimensional analysis to show that of =fal UL P PU'L b) Name the dimensionless group UL/v and explain why dependence on this 02 marks parameter can often be neglected in hydraulic modelling, provided that it is sufficiently large. In a full-scale prototype the current velocity U = 2.0 m s¹ and the angular velocity is 15 rpm. A 1:10 scale laboratory model is to be tested in fluid of the same density with angular velocity 60 rpm. c) What current velocity should be used in the model tests? d) If the power output in the model tests is 200 W, what power output would be expected in the prototype 05 marks (CLO-3, PLO-2) 05 marks 04 marks