A building design of vertical axis wind turbines (VAWT) was presented in the article. The construction and operating principle of a wind turbine were described therein. Two VAWT turbine models were compared, i.a. Darrieus and Lenz2, taking their strengths and weaknesses into consideration. 3D solid models of turbine components were presented with the use of SolidWorks software. Using CFD method...

A dynamic computer model of a turbine was developed in MATLAB in order to study the behavior of vertical axis wind turbines (VAWTs) with variable pitch (articulating) foils. The simulation results corroborated the findings of several empirical studies on VAWTs. The model was used to analyze theories of pitch articulation and to inform the discussion on turbine design. Simulations of various mod...

This paper aims to enhance the performance of H-Darrieus Vertical Axis Wind Turbine (VAWT) via introducing upstream deflectors. The impact this addition has been investigated and discussed through different deflector configurations. turbine before after adding wind rotor barriers was compared. A two dimensional, incompressible, transient, turbulent flow model built up in order simulate air arou...

The wind is one of the most promising green energy resources that replenishes itselves in less than a human lifetime without depleting planet’s resources. According to disposition blade concerning shaft, turbine can be classified as horizontal axis (HAWT) and vertical (VAWT). In contrast VAWT, HAWT covers commercial installations around globe. However, VAWTs became alternative for areas far awa...

The present study investigates the impact of rotor solidity and blade profile on self-starting characteristics performance H-Darrieus wind rotors (H-rotors) through subsonic tunnel experiments. Three symmetrical (NACA 0018) three unsymmetrical (NREL S823) H-rotors were analyzed to determine coefficient static torque (Cts) power (Cp) across solidities (σ = 0.25, 0.3, 0.35) two free stream speeds...

Viewed on a hydrodynamic scale, flames in experiments are often thin so that they may be described as gasdynamic discontinuities separating the dense cold fresh mixture from the light hot burned products. The original model of a flame as a gasdynamic discontinuity was due to Darrieus and to Landau. In addition to the fluid dynamical equations, the model consists of a flame speed relation descri...