This article proposes an efficient correction model that enables the extension of blade element momentum method (BEM) for swept blades. Standard BEM algorithms, assuming a straight in rotor plane, cannot account changes induction system introduced by sweep. The proposed corrects axial regarding two aspects: azimuthal displacement trailed vorticity and curved bound vortex on itself. extended alg...

The Wells turbine rotor consists of several symmetric airfoil blades arranged around a central hub, and the stagger angle is 90 degrees. These characteristics simplify the total construction of OWC type wave energy converters. Although the Wells turbine is simple, the turbine produces a complicated flow field due to the peculiar arrangement of blades, which can rotate in the same direction irre...

Human-specific small insertions and deletions (HS indels, with lengths <100 bp) are reported to be ubiquitous in the human genome. However, whether these indels contribute to human-specific traits remains unclear. Here we employ a modified McDonald-Kreitman (MK) test and a combinatorial population genetics approach to infer, respectively, the occurrence of positive selection and recent selectiv...

most of the methods that have been proposed for speed estimation of induction machines require the rotor and the stator resistance to change in the normal operating range. on the other hand, estimation of the rotor resistance requires rotor speed. in this paper, after studying conditions for simultaneous estimation of rotor speed and rotor resistance, a method for simultaneous estimation of rot...

Scan based or Line Sweep methods are a traditional mechanism to traverse the physical layout, or artwork of a microchip. These traversals are incremental in nature. They typically traverse the artwork from bottom to top (in the y direction) and from left to right (in the x direction) in a traditional Cartesian plane. As the traversal occurs, client applications need to know what causes a given ...

the rotor of enegelberg whitener was equipped with a screw conveyor to reduce broken rice percentage. according to preliminary experiments this modification could reduce broken rice percentage about 2.5%. further experiment was performed to determine the effect of rotor speeds and blade positions on white rice quality. to do this, five rotor speeds, consisting 500, 600, 700, 800 and 900 r.p.m a...

Abstract This publication presents an analytical method for the aerodynamic and acoustic pre-design of ducted fans small aircraft. Based on studies primary design variables, paper discusses physical sound generation phenomena, as well interdisciplinary relationships fan design. First, analysis methods are described. On basis mean line method, radial distribution flow velocities is used to deter...

sunn pest (eurygaster integriceps put.) cause serious economic damage to wheat and barley in borujerd, north of lorestan province, iran. sweep net sampling, is the most convenient sampling procedure for many arthropods, but it is difficult to interpret in terms of accuracy and precision. much of the variation of sweep net catches, stems from human factors and its calibration. in this research, ...

tip leakage loss introduces major part of losses of the rotor in axial gas turbines. therefore, the rotor blade tip has a considerable effect on rotor efficiency. to understand the flow physics of the rotor tip leakage, we solve the flow field for different tip platforms (passive flow control) and by considering coolant tip injection (active flow control). various blade tip configurations such ...