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Performance analysis of a small-scale Orthopter-type Vertical Axis Wind Turbine
منشور في 2018"…Wind tunnel experiments were carried out to measure the torque of two-, three, and four-bladed turbine, each at a set of different wind speeds and blade aspect ratios. Increasing solidity was achieved by either decreasing the blade aspect ratio or increasing the number of blades, both resulting in a higher peak power coefficient (Cp,max) of the VAWT. …"
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Quantitative Compressibility Effects in Thermal Elastohydrodynamic Circular Contacts
منشور في 2015"…The results reconfirm the well-known observations that minimum film thickness is very little affected by lubricant compressibility while central film thickness decreases linearly with the increase in volume compression of the lubricant. …"
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Effects of natural organic matter on aggregation kinetics of boron nanoparticles in monovalent and divalent electrolytes
منشور في 2010"…However, the attachment efficiency kept increasing in the presence of CaCl2 and alginate with the increase in the electrolyte concentration and was greater than unity at >4 mM CaCl2. The destabilization was attributed to bridging of the nanoparticles by the alginate–Ca2+ system. …"
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Optimum sizing of steam turbines for concentrated solar power plants
منشور في 2012"…Finally, although the cost of electricity of a CSP plant with capacities greater than 1MWe is significantly reduced to less than 1US$/kWh, currently such technology can only become economically viable through supporting schemes.…"
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Trends and levels of the global, regional, and national burden of appendicitis between 1990 and 2021: findings from the Global Burden of Disease Study 2021
منشور في 2024"…Although the global age-standardised incidence rate of appendicitis has steadily decreased between 1990 and 2021, almost half of GBD regions saw an increase of greater than 10% in their age-standardised incidence rates. …"
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Influence of temperature on tire-pavement noise in hot climates: Qatar case
منشور في 2021"…However, no clear dependence on the temperature coefficient on the vehicle’s speed is observed in this study.…"
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