Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 178 for “"Turbine Blade"”.
-
Gas turbine blade cooling
Thesis (M.S.) Massachusetts Institute of Technology. Dept. of Mechanical Engineering, 1947.
-
Rotational effects on turbine blade cooling
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1994.
-
Probabilistic analysis of turbine blade durability
The effect of variability on turbine blade durability was assessed for seven design/operating parameters in three blade designs. The parameters included gas path and cooling convective parameters, metal and coating thermal conductivity and coating thickness. The durability life was modelled as …
-
Structural design of waste-thermoplastic wind turbine blade
Wind turbine blades are unrecyclable at end of life, which has led to the testing of thermoplastics to replace thermosets in the composite; thus making recycling possible. Another challenge, waste plastics of which 55% of all plastics produced in 2015 were discarded into the environment. Utilising …
-
Fatigue mechanisms in FV520B, a turbine blade steel.
An investigation has been undertaken to examine the effect of microstructure on the mechanical properties of FV520B, a precipitation hardenable martensitic stainless steel. This high performance grade of stainless steel was heat treated to three commercially available material specifications, …
-
Boundary layer transition in simulated turbine blade flow
… development of the boundary layer in a simulated turbine blade flow is described.<br/><br/>A velocity distribution typical of a "squared-off" turbine blade was reproduced in an open return wind tunnel. Measurements were made in the boundary layer formed on a flat, polished aluminium plate using …
-
Small Wind Turbine Blade Sensor for Condition Based Maintenance
… Energy is a fast growing industry. However, wind turbines are expensive to build, so they need proper maintenance to prolong service life. Since blades are the most important components in the wind turbine, this project prototyped a low cost sensing system to monitor blades' health. The sensor …
-
Aerothermal Sentencing for Manufacturing Variations on Turbine Blade Shrouds
The tolerances used to sentence HPT blades need to be well-matched to the corresponding influence on aerothermal performance caused by the geometric deviation. If this condition is not fulfilled, this can lead to well-performing parts costing around $8000 being scrapped and suboptimal parts being …
-
Turbine blade erosion and the use of wind protection tape
The aerodynamic performance of wind turbine airfoils with leading edge erosion was investigated in this research. The tests were conducted on DU 96-W-180 wind turbine airfoil at three Reynolds numbers between 1 and 1.85 million and angles of attack spanning the low drag range of the airfoil. The …
-
Geometric Effects of Thermal Barrier Coating Damage on Turbine Blade Temperatures
<p>Thermal barrier coatings (TBC) found on turbine blades are a key element in the performance and reliability of modern gas turbines. During the life of the turbine components, the TBC surface may be damaged due to manufacturing imperfections, handling damage, service spalling, or service impact …
-
A Hybrid Multi-Objective Evolutionary Algorithm for Wind-Turbine Blade Optimization
… Renewable Energy Laboratory's (NREL) 5MW wind-turbine blade. To estimate the aerodynamic and structural performance, blade element momentum (BEM) and beam models were developed and validated. By hybridizing a multi-objective evolutionary algorithm (MOEA) with gradient-based local search, it is …
-
The effects of rotation on heat transfer in turbine blade cooling
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1994.
-
Impact of aerothermal modeling on the estimation of turbine blade life
… impact of aerothermal modeling on estimates of turbine blade heat transfer and life was assessed for three high pressure turbine blades. The work was conducted as part of a project aimed at the evaluation of the effect of variability on turbine life. Pressure and thermal loads were extracted …
-
Stagger angle effects on impingement cooling of a rotating turbine blade
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1984.
-
Probabilistic turbine blade thermal analysis of manufacturing variability and toleranced designs
… cause of a large scatter in the life of gas turbine hot-section components. This research deals with schemes to improve robustness through tolerancing input parameters in ranges of the distributions which make non-conformances more likely. The need for probabilistic analysis to investigate …
-
Measurements of Cooling Effectiveness Along the Tip of a Turbine Blade
In a gas turbine engine, turbine blades are exposed to temperatures above their melting point. Film-cooling and internal cooling techniques can prolong blade life and allow for higher engine temperatures. This study examines a novel cooling technique called a microcircuit, which combines internal …
-
Development of Vacuum Assisted Composites Manufacturing Technology for Wind Turbine Blade Manufacture
Wind turbine blade manufacturers employ the vacuum infusion technique to produce monolithic and sandwich cored components, recent innovations have seen companies such as Siemens develop products which incorporate an internal composite structure in a single process (Siemens 2008). This thesis …
-
Experimental evaluation and modeling of a turbine blade with potassium evaporative cooling
A new method of turbine blade cooling, the Return Flow Cascade, has been developed in which vaporization of a liquid metal such as potassium is used to maintain the blade surface at a nearly uniform temperature. Turbine blades cooled using this technology have lower blade temperature levels …
-
Film Cooling Predictions Along the Tip and Platform of a Turbine Blade
Turbine airfoils are exposed to the hottest temperatures in the gas turbine with temperatures typically exceeding the melting point of the blade material. Cooling methods investigated in this computational study included parasitic cooling flow losses, which are inherent to engines, and microcircuit …
-
Investigation of Aerodynamic Profile Losses for a Low-Reaction Steam Turbine Blade
… and near-tip sections of a low-reaction steam turbine blade and compares them to CFD of the former. The purpose of these tests was the refinement of a proprietary empirical profile loss model. A review of the literature shows that experimental data on this type of blade is not openly available. …
Page 1 of 9