This book discusses research-focused information regarding the development of gas turbine performance. There has been a remarkable transformation in the research and advancement regarding gas turbine technology for transportation and power generation. The former remains unchanged with respect to the past, as the superiority of air-breathing engines in comparison to other technologies is immense. On the other hand, the world of gas turbines (GTs) for power generation is characterized by various scenarios, as new challenges are coming up in current energy trends, where the reduction in the usage of carbon-based fuels and the increase in the utilization of renewable sources are becoming highly significant. It has been a key technology for base-load applications for many years; however major stationary gas turbines are facing challenges in balancing electricity from various renewable sources with that from flexible traditional power plants. The book presents an updated picture as well as a perspective view of some of the above mentioned topics that distinguish GT technology in two different applications- aircraft propulsion and stationary power generation. So, the target audience for the book includes design, analyst, elements and maintenance engineers. Some major topics included within the book are gas turbine and element performance, gas turbine combustion, and fault revelation in systems and substances.