The propagation of turbulent premixed flames influenced by the intrinsic hydrodynamic flame instability (the Darrieus-Landau instability) is considered in a two-dimensional case using the model nonlinear equation proposed recently by Bychkov [Phys. Rev. Lett. 84, 6122 (2000)]. The nonlinear equation takes into account both the influence of external turbulence and the intrinsic properties of a f...

Turbin angin savonius merupakan turbin dengan sumbu vertika yang memiliki banyak kelebihan diantaranya bentuk konstruksi mudah dibuat, tidak memerlikan kecepatan tinggi untuk mulai berputarnya. Penambahan darrieus diharapkan dapat meningkatkan efisiensi pada ini, Pada penelitian ini akan dilakukan pengujian dan darrieus, secara eksperimen terhadap kedua juga hybrid parameter daya putaran poros....

The present paper presents the aeroacoustic calculation methodology for H-Darrieus wind turbine. CFD analysis, different turbine blades? angles of attack, coupled with noise based on Lighthill and Prudmann models is performed. This type particular interest since it insensitive to direction can be used in urban areas. In this study commercial software, ANSYS analysis. required turbulent flow fie...

The renewable energy sources such as wind energy maintain to increase in popularity since they are inexhaustible and pollution-free. The horizontalaxis wind turbine has been the most common type of wind turbines but due to recent increase in popularity of personal green energy solutions, Vertical-Axis Wind Turbines (VAWT) are becoming more common. Besides two mayor rotor types of VAWTs the Darr...

Preliminary notes The kinetic energy of river currents is weakly researched for the possibility of production of electrical energy. Thus there are very few new suggestions for the exploitation of this energy form. This paper shows a method of exploiting the hydrokinetic energy of river currents created by combining the traditional water wheel and the Darrieus turbine. The water wheel is used du...

Purpose The purpose of the paper is to predict aerodynamic performance a complete scale model H-Darrieus vertical axis wind turbine (VAWT) with end plates at different operating conditions. This aims understanding flow physics around VAWT for three tip speed ratios corresponding regimes. Design/methodology/approach study achieves first three-dimensional hybrid lattice Boltzmann method/very larg...

A new computational model for the analysis of the suspension system of an innovative concept in vertical-axis wind turbines is introduced. We used this model to study a new concept in extra-large wind-power plants: the VGOT (variable-geometry oval-trajectory) Darrieus wind turbine. In a traditional Darrieus turbine, the blades rotate around a central vertical axis. In the VGOT concept each blad...