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 153 for “"Aerodynamic performance"”.
-
The power balance method For aerodynamic performance assessment
… the use of the power balance method for performance estimation of aircraft configurations. In this method, mechanical power production and mechanical power consumption of the aircraft are balanced, rather than forces as in the conventional thrust and drag approach to aircraft performance …
-
Aerodynamic performance measurements in a fully scaled turbine
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 1998.
-
Aerodynamic performance evaluation of multi inner blades savonius rotor
… For that, this study aims to increase the performance of the Savonius wind rotor in order to generate more useful power. In the present study, the aerodynamics performance of the Savonius wind turbine rotor with inner blades was investigated. The effect of number of inner blades, angle of …
-
Aerodynamic performance measurements of a film-cooled turbine stage
The goal of this research is to measure the aerodynamic performance of a film-cooled turbine stage and to quantify the loss caused by film-cooling. A secondary goal of the research is to provide a detailed breakdown of the losses associated with film-cooling for the turbine stage being tested. The …
-
Aerodynamic performance measurements in a counter-rotating aspirated compressor
… thesis is an experimental investigation of the aerodynamic performances of a counter-rotating aspirated compressor. This compressor is implemented in a blow-down facility, which gives rigorous simulation of the characteristic aerodynamic parameters in which a compressor operates in steady state …
-
Influence of low-speed aerodynamic performance on airport community noise
… fuel consumption, and cost. Aircraft low-speed aerodynamic performance is an important driver of all these impacts, and this thesis presents the development of an aerodynamic tool capable of accurately estimating key low-speed performance characteristics using aircraft geometry information …
-
Aerodynamic performance measurements of a fully scaled, film-coated, turbine stage
… facility was used to experimentally measure the aerodynamic performance of a film-cooled turbine stage. Turbine torque, speed, mass flow, temperature, and pressure were measured and used to calculate efficiency. Pressure ratio, corrected speed, and coolant mass flow were varied parametrically …
-
Evaluation of propulsor aerodynamic performance for powered aircraft wind tunnel experiments
This thesis describes a methodology to convert electrical power measurements to propulsor mechanical ow power for a 1:11-scale, powered wind tunnel model of an advanced civil aircraft utilizing boundary layer ingestion (BLI); mechanical ow power is a surrogate for aircraft fuel burn. Back-to-back …
-
Aerodynamic performance and heat transfer characteristics of high pressure ratio transonic turbines.
Thesis. 1976. Sc.D.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
-
Analysis and Improvement of Aerodynamic Performance of Straight Bladed Vertical Axis Wind Turbines
… for their relatively simple structure and aerodynamic performance. Their commercialization, however, still encounters many challenges. A series of studies were conducted in the current research to improve the VAWTs design and enhance their aerodynamic performance. First, an efficient design …
-
A Computational Fluid Dynamics Study on the Aerodynamic Performance of Ram-Air Parachutes
<p>The modeling of a ram-air parachute presents challenges in the prediction of the inflight geometry, as there is a strong interaction between the flow field and parachute structure. This thesis presents the development of a CAD design and CFD methodology to the simulation of ram-air parachutes in …
-
Experimental Study of Full-Scale Iced -Airfoil Aerodynamic Performance Using Sub-Scale Simulations
Determining the aerodynamic effects of ice accretion on aircraft surfaces is an important step in aircraft design and certification. The goal of this work was to develop a complete sub-scale wind tunnel simulation methodology based on knowledge of the detailed iced-airfoil flowfield that allows the …
-
Aerodynamic performance of low-to-moderate aspect ratio wings at low Reynolds numbers
… the low-turbulence wind tunnel in the Subsonic Aerodynamics Research Laboratory at the University of Illinois at Urbana-Champaign (UIUC). An external three-component platform force balance was designed, fabricated and assembled to perform the experiments. The balance design methodology, …
-
Experimental study of full-scale iced-airfoil aerodynamic performance using sub-scale simulations
Determining the aerodynamic effects of ice accretion on aircraft surfaces is an important step in aircraft design and certification. The goal of this work was to develop a complete sub-scale wind tunnel simulation methodology based on knowledge of the detailed iced-airfoil flowfield that allows the …
-
Aerodynamic Performance of a Flow Controlled Compressor Stator Using an Imbedded Ejector Pump
A high-turning compressor stator with a unique flow control design was developed and tested. Both boundary layer suction and trailing edge blowing developed from a single supplied motive pressure source are employed on the stator. Massflow removed through boundary layer suction is added to the …
-
Aerodynamic Performance Enhancement of a NACA 66–206 Airfoil Using Supersonic Channel Airfoil Design
Supersonic channel airfoil design techniques have been shown to significantly reduce drag in high-speed flows over diamond shaped airfoils by Ruffin and colleagues. The effect of applying these techniques to a NACA 66-206 airfoil is presented. The design domain entails channel heights of 8-16.6% …
-
Evaluating the Aerodynamic Performance of MFC-Actuated Morphing Wings to Control a Small UAV
… purpose of this research is to evaluate certain performance characteristics of a morphing<br />wing system that uses Macro Fiber Composites (MFC) to create camber change. This<br />thesis can be broken into two major sections. The first half compares a few current MFC<br />airfoil designs to each …
-
Aerodynamic Performance of High Turning Airfoils and the Effect of Endwall Contouring on Turbine Performance
… cost and weight, they also result in increased aerodynamic losses and associated issues. The strength of secondary flows is influenced by the upstream boundary layer thickness as well as the overall flow turning angle through the blade row. Secondary flows result in stagnation pressure loss …
Page 1 of 8