Accurate simulations of the aerodynamic performance of vertical-axis wind turbines pose a significant challenge for computational fluid dynamics methods. The aerodynamic interaction between the blades of the rotor and the wake that is produced by the blades requires a high-fidelity representation of the convection of vorticity within the wake. In addition, the cyclicmotion of the blades induces...

A thermodynamic process of power generation has been developed for a gas turbine, a steam turbine, and a compressor, supported by adiabatic expansion or compression processes. Recently, the possible inlet temperature of gas turbines has been increased to 1500°C or more, and the inlet temperature of steam turbines also has been increased to 650°C. At these high-temperature conditions, turbine no...

The problem of wind turbine control has received significant attentions in recent years. The maximization of energy generation and load reduction are two major objectives for the control of wind turbine systems. Varieties of approaches have been proposed to achieve the above two objectives. Specifically, indirect speed control (ISC) and PID control have been widely used for the energy maximizat...

Reliability of gas turbine power plant is related to the blade normal operation. In this paper, a new on-line condition monitoring method has been presented to evaluate two important factors affecting the turbine blades that are the tip clearance and tip deformation. A K band’s microwave sensor has been simulated and optimized in CST Microwave Studio software. Scattering parameters of the near...

Wind turbine noise is one of the major obstacles for the widespread use of wind energy. Noise tone can greatly increase the annoyance factor and the negative impact on human health. Noise annoyance caused by wind turbines has become an emerging problem in recent years, due to the rapid increase in number of wind turbines, triggered by sustainable energy goals set forward at the national and int...

................................................................................................................................... v CHAPTER 1 GENERAL INTRODUCTION ................................................................................ 1 1.1 Background ........................................................................................................................... 1 1.2 Moti...

The technique of laser photoacoustic spectroscopy is applied to the studies of surface and sub-surface structures of solids in a nondestructive fashion. In the present case, special attention is focused on reaction-bonded Si N ceramics, which are used for the manufacturing of turbine blades. Good correlation is obtained betwee~ fhe observed photoacoustic signal and surface microstructures. In a...

-Renewable energy has become the prime source of clean and pure form of energy. With the prevailing energy crisis non-conventional energy has become the solution to it. Harnessing wind energy by several wind turbines is commonly done using various types of rotors. But nowadays Seep twist adaptive rotor blades are used to increase annual energy capture of baseline turbine by 5%-10% without excee...