The debate over the best electric grid topology for an all electric ship has provoked discussion on a wide range of topics, spanning interconnection issues, transmission losses, and power preferences of electronic components, radar ranges, and propulsion motors. Surprisingly, these issues are peripheral to the real issue. The primary driver in this debate is the power source, presently the gas ...

Wind turbines generate electricity without directly emitting air pollutants that are known to affect the climate and human health. Wind turbines, however, do not operate in a vacuum. They are integrated into the larger electrical grid that includes coal and nuclear plants, natural gas turbines, hydroelectric dams, solar panels and other technologies. The interactions between these electricity s...

The outcome of NEDO supported international research project led by University of Tokyo is reviewed, with respect to developing key technologies for ultra-micro gas turbines (UMGT). The study suggested ‘Finger-top’ gas turbines as a currently feasible extreme that install rotors of 8 mm in diameter with 1.2 million rpm to produce tens of watts net output. Prior to practicing such UMGT system in...

State-of-the-art aeronautic Low Pressure gas Turbines (LPTs) are already characterized by high quality standards, thus they offer very narrow margins of improvement. Typical design process starts with a Concept Design (CD) phase, defined using mean-line 1D and other loworder tools, and evolves through a Preliminary Design (PD) phase, which allows the geometric definition in details. In this fra...

Monitoring of industrial gas turbines is of vital importance, since it gives valuable information for the customer about maintenance, performance, and process health. The performance of an industrial gas turbine degrades gradually due to factors such as environment air pollution, fuel content, and ageing to mention some of the degradation factors. The compressor in the gas turbine is especially...

A WebQuest is an Internet-based and inquiry-oriented learning activity. The aim of this work is to outline the creation of a WebQuest entitled “Power Generation Plants: Steam and Gas Turbines.” This is one of the topics covered in the course “Thermodynamics and Heat Transfer,” which is offered in the second year of Mechanical Engineering at the Defense University Center at the Naval Academy in ...

Today, gas turbines (GTs) are one of the major parts of modern industry. They have played a key role in aeronautical industry, power generation, and main mechanical drivers for large pumps and compressors. Modelling and simulation of GTs has always been a powerful tool for performance optimization of this kind of equipment. Remarkable research activities have been carried out in this field and ...

The gas turbine presents significant challenges to any computational fluid dynamics techniques. The combination of a wide range of flow phenomena with complex geometry is difficult to model in the context of Reynolds-averaged Navier–Stokes (RANS) solvers. We review the potential for large eddy simulation (LES) in modelling the flow in the different components of the gas turbine during a practic...