CFD Effect of the Tidal Grating in Opposite Directions
نویسندگان
چکیده
Flow blockages referring to the increase in flow are being considered as a vital equipment for marine current energy conversion. However, the shape of these devices will result in extracted energy under the operation. The present work investigates the effect of two configurations of a grating, convergent and divergent that located upstream, to the water flow velocity. The flow characteristics are studied by Computational Fluid Dynamic simulation by using the ANSYS Fluent solver for these specified arrangements of the grating. The results indicate that distinguished characteristics of flow velocity between “convergent” and “divergent” grating placements is up to 10% in confined conditions. than that of divergent grating. Keywords—Marine current energy, marine current energy
منابع مشابه
Natural Ventilation: Analysis of Indoor Airflow in an Assumed Cubic Building with Opposite Openings by CFD Investigations
The natural ventilation is an easy way to exchange the indoor polluted warm air with outdoor fresh air. The wind power injects outdoor fresh air into the building. A good indoor air current and subsequently a proper exhaust depend on the openings’ conditions and their situations. A serious architectural question is under what conditions of the openings the wind-cross ventilation can be effectiv...
متن کاملStudy of NACA 0015 for Diffuser Design in Tidal Current Turbine Applications (TECHNICAL NOTE)
Tidal energy is the most foreseeable form of renewable energy. Tidal energy can be harnessed by tidal barrage, tidal fence and tidal current technologies. Present efforts are focused on diffuser augmented tidal turbines that exploit the kinetic energy of the tidal currents. The power output by a tidal turbine is directly proportional to the cube of velocity of incoming fluid flow. Thus, even a ...
متن کاملDPM flow pattern of LHD in underground mines with different ventilation conditions
Diesel-operated Load Haul Dumper (LHD) vehicles are commonly used in underground coal mines. Despite their value as utility vehicles, the main drawback of these vehicles is that they generate diesel particulate matter (DPM), a known carcinogenic agent. In this work, an attempt is made to model DPM flows generated by LHDs in an underground coal mine environment for different DPM flow and intake ...
متن کاملA Single Grating-lens Focusing Two Orthogonally Polarized Beams in Opposite Direction
This paper proposes a novel high-contrast grating (HCG) element that simultaneously has two distinct functions; focusing and polarizing. The phase front distribution of a diffracted wave is fitted to that of an ideal conventional lens through properly controlling only the thicknesses of each grating bar. Finally, it is confirmed that the properly designed HCG can be a polarizer as well as a len...
متن کاملAn illusion of relative motion dependent upon spatial frequency and orientation
Observers scanned a stationary pattern comprising a tilted sine-wave grating completely surrounding another grating of similar spatial frequency but tilted in the opposite direction (Fig. 2). They reported an illusory "sliding" motion of the inset grating with respect to the surround grating and the effect was clearly strongest for angles between the gratings of less than 60 degrees and for spa...
متن کامل