Abstract. Using the concept of impulse in control volume analysis, we derive general expressions for wind turbine thrust a constant, spatially uniform wind. The absence pressure equations allows their application near wake, where flow is assumed to be steady frame reference rotating with blades. assumption circumferential uniformity wake – as applies when number blades or tip speed ratio tends ...

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The evaluation of the overall performance is important to design an oscillating water column (OWC) device. A generic OWC model was tested experimentally in a wave flume, which employed real impulse turbine be connected with air chamber. performances under free-spinning mode irregular scenarios were analyzed. Effects electronic resistance acting as external loads drive train on primary-stage, se...

Abstract ross flow turbines are widely used as for driving micro-scale hydropower plants in rural areas, but their efficiency is still low because cross only use one nozzle. The utilization of the potential energy water not optimal yet to be converted into pressure and kinetic nozzles with high velocity hitting turbine blades. problem nozzle has an uneven blades, it effective converting power t...

A High Power Impulse Magnetron Sputtering (HiPIMS) method for depositing TiAlN environmental barrier coatings on the surface of Ti-48Al-2Cr-2Nb alloy was developed in view of their exploitation in turbine engines. Three differently engineered TiAlN films were processed and their performance compared. Bare intermetallic alloy coupons and coated specimens were submitted to thermal cycling under o...

Continuous Scan Laser Doppler Vibrometry (CSLDV) can greatly accelerate modal testing by continuously sweeping the measuring laser over the structure, effectively capturing the response of the structure at tens or even hundreds of points simultaneously. The authors recently extended this technique to the case where the input forces are unmeasured and random using harmonic power spectrum. This p...