نتایج جستجو برای: q blade
تعداد نتایج: 133137 فیلتر نتایج به سال:
A morphing segmented concept is proposed herein for future extreme-scale wind turbine systems. The morphing may be accomplished by using segmented blades connected by screw sockets and a tension cable system. At low wind and rotor speeds, the segmented blades are fully tensioned and set at high pitch to ensure start-up and maximum power at low speeds. At high rotor rpm, the cable tension can be...
introduction: epulis fissuratum is often formed as a result of a poor fitting denture. the conventional treatment for this fibrous hyperplastic tissue is to excise it using a scalpel and to close the wound by a continuous or an interrupted suture. the increased utilization of lasers in dentistry also includes the utilization of carbon dioxide (co2) lasers in place of surgical scalpels in soft t...
Accuracy is the key issue in the precision forging. Geometric and dimension errors are the two significant defects found in most of near net or net shape manufacturing process. It becomes more critical for complex part such as an AUV propeller blade. In this study, geometric error was quantified by comparing the blade profile obtained from nominal geometry of the blade and the profile construct...
A series of wind tunnel experiments was conducted to study the e ect of propeller solidity and thrust axis inclination on the propeller normalforce coe cient. Experiments were conducted in the Langley 14by 22-Foot Subsonic Tunnel with a sting-mounted, counterrotation, scalemodel propeller and nacelle. Con gurations had two rows of blades with combinations of 4 and 8 blades per hub. The solidity...
وجود رافینوز در ملاس چغندرقند مشکلات زیادی را برای تبلور ساکاروز بوجود می آورد. برای حذف این قند روشهای مختلفی وجود دارد که در این پژوهش استفاده از یک بیوراکتور تثبیت آنزیمی برای حذف رافینوز مورد توجه قرار گرفت . ابتدا سینتیک آنزیم آلفاگالاکتوزیداز، انواع بیوراکتور، اثر انتقال جرم در راکتور مورد بررسی قرار گرفت و با استفاده از اطلاعات بدست آمده آزمایشات مربوطه انجام شد. پارامترهای سینتیکی (دما ...
The rigid body motion can be represented by a motor in geometric algebra, and the motor can be rewritten as a trinometric function of the screw blade. In this paper, a screw blade strapdown inertial navigation system (SDINS) algorithm is developed. The trigonometric function form of the motor is derived and utilized to deduce the Bortz equation of the screw blade. The screw blade SDINS algorith...
The standard guillotine-shaped vitreous cutter blade (hereafter named Regular Blade [RB]) did not substantially change over the past 40 years, because of its simple and robust design. The asynchronous suction and cutting action, typical of RB blades, determines complete port obstruction generating flow instability and fluid acceleration that results in limited efficiency and eventually retinal ...
This research describes aerodynamic characteristics of small-scale wind turbine blade, called Archimedes spiral wind turbine blade. Numerical approaches on the prediction of aerodynamic performance of the blade have been conducted. Both steady and unsteady state numerical simulations using ANSYS CFX are performed on the several cases of rotating speeds. Large scale tip vortex is captured and gr...
Blade configuration of nanofluids has been proven to perform much better than dispersed configuration for some heat conduction systems. The analytical analysis and numerical calculation are made for the cylinder--shaped and regular-rectangular-prism--shaped building blocks of the blade-configured heat conduction systems (using nanofluids as the heat conduction media) to find the optimal cross-s...
A Gravitation Water Vortex Power Plant (GWVPP) tool has been made to determine how much water flow is needed generate electricity. This research was conducted by changing the rate and pressure effect on performance of a vortex power plant, in previous studies, no one changes discharge pressure. The type basin position used this study an open closed position. Based advantages disadvantages each ...
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