CHAPTER 1: INTRODUCTION The research work in this dissertation has been presented in two parts. First part is related to the detailed three dimensional flow investigation of one and a half stage axial turbine. The objective of this part is to study the effect of rotor stator interaction and the computation aerodynamic forceson turbine blade. The second part includes the free and forced vibration analysis of the turbine rotor blade to study the vibratory stress suppression. Background, Scope and Motivation Turbomachine is a device in which the energy is transferred either to or from a continuously flowing fluid by the dynamic action of one or more moving blade rows. It plays a major role in particular in aircraft, marine space (liquid rockets), land propulsion system but also in hydraulic, gas and steam turbines applications. It is also involved in industrial pipeline and processing equipment such as gas, petroleum and water pumping plants. Other applications can be related to heart-assist pumps, industrial compressors and refrigeration plants, among others. The turbomachinery field includes turbines, pumps, fans, compressors. A turbomachine is composed of several basic elements including the blade (also called vane if it is non-rotating), hub, and shroud. Several technological effects involving clearances, seal leakages and cooling holes among others can complete the machine. Due to the complexity of the blade shapes, the presence of technological elements and the rotation of machine, the nature of the flow are strongly three-dimensional, often depicting complex flow paths. The turbomachine which we have chosen for our analysis is a gas turbine whose principle is to extract energy from the fluid and convert it into mechanical energy as power output at the shaft. Fluid Dynamics and Rotor Stator Interaction CFD research on turbo machinery has provided various tools for predicting the detailed flow behavior in multistage turbines. High performance and narrow design margins demand an optimized design and accurate flow analysis prediction. Advancement in computational power and numerical methods which solve the Reynolds averaged Navier Stokes equations not only provide the flow details but also become an important element of the turbo machinery design.
CHAPTER 1: INTRODUCTION The research work in this dissertation has been presented in two parts. First part is related to the detailed three dimensional flow investigation of one and a half stage axial turbine. The objective of this part is to study the effect of rotor stator interaction and the computation aerodynamic forceson turbine blade. The second part includes the free and forced vibration analysis of the turbine rotor blade to study the vibratory stress suppression. Background, Scope and Motivation Turbomachine is a device in which the energy is transferred either to or from a continuously flowing fluid by the dynamic action of one or more moving blade rows. It plays a major role in particular in aircraft, marine space (liquid rockets), land propulsion system but also in hydraulic, gas and steam turbines applications. It is also involved in industrial pipeline and processing equipment such as gas, petroleum and water pumping plants. Other applications can be related to heart-assist pumps, industrial compressors and refrigeration plants, among others. The turbomachinery field includes turbines, pumps, fans, compressors. A turbomachine is composed of several basic elements including the blade (also called vane if it is non-rotating), hub, and shroud. Several technological effects involving clearances, seal leakages and cooling holes among others can complete the machine. Due to the complexity of the blade shapes, the presence of technological elements and the rotation of machine, the nature of the flow are strongly three-dimensional, often depicting complex flow paths. The turbomachine which we have chosen for our analysis is a gas turbine whose principle is to extract energy from the fluid and convert it into mechanical energy as power output at the shaft. Fluid Dynamics and Rotor Stator Interaction CFD research on turbo machinery has provided various tools for predicting the detailed flow behavior in multistage turbines. High performance and narrow design margins demand an optimized design and accurate flow analysis prediction. Advancement in computational power and numerical methods which solve the Reynolds averaged Navier Stokes equations not only provide the flow details but also become an important element of the turbo machinery design.
Sample%20Thesis%20Template%20-%20SMME.docx