نتایج جستجو برای: shape of blade

تعداد نتایج: 21177351  

2012
Peter J. Schubel Richard J. Crossley

A detailed review of the current state-of-art for wind turbine blade design is presented, including theoretical maximum efficiency, propulsion, practical efficiency, HAWT blade design, and blade loads. The review provides a complete picture of wind turbine blade design and shows the dominance of modern turbines almost exclusive use of horizontal axis rotors. The aerodynamic design principles fo...

2013
Farooq Ahmad Najar G A Harmain

This paper reviews the design optimization of wind turbine blades through investigating the design methods and analyzing the performance of the blades. The current research work in this area include wind turbine blade geometric design and optimization, aerodynamics analysis, wind turbine blade structural design and dynamics analysis. Blade geometric design addresses the design parameters, inclu...

2003
T. Mengistu

Two global optimization algorithms, namely Genetic Algorithm (GA) and Simulated Annealing (SA), have been applied to the aerodynamic shape optimization of transonic cascades; the objective being the redesign of an existing turbomachine airfoil to improve its performance by minimizing the total pressure loss while satisfying a number of constraints. This is accomplished by modifying the blade ca...

2016
László E. Kollár Rakesh Mishra Anuj Jain

An inverse design process is applied to determine blade shapes used in vertical axis wind turbines (VAWTs). The method is based on the modified Garabedian-McFadden technique that uses the deviation of the pressure distribution or the velocity distribution on the surface from a target pressure or velocity distribution, and modifies the blade surface in order to reduce this deviation. The method ...

Journal: :The Journal of experimental biology 2009
Philip S L Anderson

The material properties of food can exert a significant influence on tooth morphology. Although the stiffness or toughness of a material is usually of prime concern, other aspects of material properties (such as extensibility) can be of equal importance. Previous experimental work on the effect blade shape has on fracturing biological materials indicated a notched blade greatly reduced the work...

Journal: :JSW 2012
Liying Wang

Modern design method can not only make up the shortcomings of the traditional design method, but also be compared on the computer, it can save a lot of trial and testing costs in new product development and play an important role in optimizing the existing products. This paper studies the modern design methods of hydraulic machinery by the use of computational fluid dynamics (CFD) combined with...

Journal: :Dental materials journal 1986
H Murakami M Kamiya S Fukuyo K Hashimoto N Horasawa M Ito S Takahashi

Six kinds of dental implants: Apaceram, Bioceram, Free design blade implant, Shape memory blade implant, Hydroxyapatite-coating blade implant and Vitallium were immersed in three kinds of solutions: Ringer's solution, 1.0% lactate acid solution, and 0.05% HCl solution, for seven days at 37•Ž. Using an inductively coupled plasma emission spectroscope, the solutions were analyzed. The element sol...

Journal: :The Journal of the Acoustical Society of America 1966

ژورنال: :مکانیک سازه ها و شاره ها 0
محسن به نیا دانشگاه صنعتی اصفهان مهدی نیلی احمدآبادی هیئت علمی/دانشگاه صنعتی اصفهان

the purpose of this study is to design a three-stage axial compressor with identical pressure ratio which makes an adequate pressure ratio and efficiency in design point conditions with rotational velocity of 38000rpm and mass flow rate of 3.2kg/s. first of all, considering some restrictions such as dehaller number more than 0.7 in all sections of the stator and the rotor, and relative mach num...

Journal: :Journal of sports sciences 2007
Nicholas Caplan Trevor N Gardner

The aim of the present study was to find a more optimal blade design for rowing performance than the Big Blade, which has been shown to be less than optimal for propulsion. As well as the Big Blade, a flat Big Blade, a flat rectangular blade, and a rectangular blade with the same curvature and projected area as the Big Blade were tested in a water flume to determine their fluid dynamic characte...

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