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 70 for “"wind tunnel testing"”.
-
An analysis of curved flow wind tunnel testing
… of the flows involved in the curved flow wind tunnel and in curved flight. Equations for the forces and moments for each of these flows are presented and then used to develop equations for the corrections to the forces and moments obtained in curved flow wind tunnel tests. An example of …
-
Investigation of a grid induced turbulent environment for wind tunnel testing
In performing wind tunnel model tests of a two-dimensional nature, a grid constructed of 3.6 x 0.75 inch boards on 18 inch centers was used at the entrance of the tunnel. Important properties of the turbulent flow behind the uniform coarse grid were determined. The flow was found to be quite …
-
Transition Detection for Low Speed Wind Tunnel Testing Using Infrared Thermography
… important phenomenon in large scale, commercial, wind tunnel testing at low speeds because it is an excellent indicator of an airfoil performance. It is difficult to estimate transition through numerical techniques because of the complex nature of viscous flow. Therefore experimental techniques …
-
Wind Tunnel Testing to Evaluate Noise Emissions from a Small Wind Turbine
The wind power industry has experienced fast and tremendous growth, globally, in recent years. Consequently, there is a growing interest in investigating aerodynamics and aeroacoustics characteristics of wind turbines and developing environmental standards aimed at decreasing noise levels in the …
-
Improved wind tunnel testing and data reduction methods using a magnetic suspension system
… dynamic forces and moments are measured at low tunnel air flow speeds.</p><p class="MsoNormal">A systematic study of the incidence ramp technique established limitations set by the model aerodynamic properties, balance dynamics and data reduction methods. A simple relationship between the …
-
Wind tunnel testing of a nacelle bypass concept for a quiet supersonic aircraft
… diameter axisymmetric test section of a subsonic wind tunnel at the University of Illinois at Urbana Champaign. By rotating the test section, pressure measurements were obtained over a range of circumferential angles and radial positions. The pressure measurements were used to create planar maps …
-
Development and evaluation of wind tunnel testing methodology for ADAS camera perception in rain
Advanced Driver Assistance System (ADAS) technologies are rapidly improving to enhance road safety and reduce accidents. However, adverse weather, particularly rain, continues to degrade sensor perception and effectiveness. Despite this, few studies address sensor degradation due to rain, with no …
-
Development of a biofeedback system for optimizing cycling performance assessment during wind tunnel testing
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics, 2002.
-
Investigating Forward Flight Multirotor Wind Tunnel Testing in a 3-By 4-Foot Wind Tunnel
… of complex multirotor aerodynamic phenomena via wind tunnel experimentation is becoming extremely important with the rapid progress in advanced distributed propulsion VTOL concepts. Much of this experimentation is being performed in large, highly advanced tunnels. However, the proliferation of …
-
The Application of CFD to Building Analysis and Design: A Combined Approach of an Immersive Case Study and Wind Tunnel Testing
Computational Fluid Dynamics (CFD) can play an important role in building design. For all aspects and stages of building design, CFD can be used to provide more accurate and rapid predictions of building performance with regard to air flow, pressure, temperature, and similar parameters. Generally, …
-
Design implications of snow deposition problems in ski resort areas
… modern technology, detailed site analysis, field testing, and wind tunnel testing. Observation of ski resorts in New England revealed that ice and snow accumulation are major problems and present hazards to pedestrians, vehicles, and structures. Field tests of flat, restricted area roofs were …
-
Flight Testing Small, Electric Powered Unmanned Aerial Vehicles
Flight testing methods are developed to find the drag polar for small UAVs powered by electric motors with fixed-pitch propellers. Wind tunnel testing was used to characterize the propeller-motor efficiency. The drag polar was constructed using data from flight tests. The proposed methods were …
-
Neural network aided aviation fuel consumption modeling
… the neural network model does not require any wind tunnel testing nor extensive aircraft analysis, compared to existing models used in aviation simulation programs, this model shows good potential. The design of the model is described in depth, and the MATLAB source code are included in …
-
Validation of 3-D ice accretion documentation and replication method including pressure-sensitive paint
… replicas of ice accretions generated from icing wind tunnels are fabricated to perform aerodynamic tests in dry-air wind tunnels. The currently employed replication method consists of creating molds from original ice accretions and producing castings from the molds for wind tunnel testing. While …
-
Convective Heat Flux Sensor Validation, Qualification and Integration in Test Articles
… comparison with the Schmidt-Boelter gage. Before wind tunnel testing, the model/sensor combinations were tested in a radiative heat flux calibration rig at known static and dynamic heat fluxes from 1 to 20 BTU/ft2/s. During wind tunnel testing, the chosen conditions yielded stagnation point …
-
Design, Development, and Analysis of a Morphing Aircraft Model for Wind Tunnel Experimentation
… relative to a rigid airframe. An aircraft wind tunnel model with considerable wing-shape freedom can serve as a tool in learning to model, control, and fully exploit the potential of such vehicles. This work describes the design, development, and initial analysis of a wind tunnel model that …
-
Wind shielding in refining and petrochemical facilities
… coast refining and petrochemical facilities is wind. Despite this fact, little has been done to customize wind design for these unique facilities. This paper proposes a probabilistic model to predict the magnitude of shielding that is provided by the vast network of pipe rack structures that …
-
Design and Development of Stability and Control Systems for Small, Deployable Aircraft
… "control" vector method in subsequent testing. Wind tunnel testing was performed to evaluate longitudinal stability and controllability. Unpowered flight tests were conducted to collect flight data and test the mechanical functionality of multiple tail designs. The accuracy of the …
-
Design, Simulation, and Wind Tunnel Verication of a Morphing Airfoil
… model. This is accomplished with in-house 2D wind tunnel testing.
-
The effect of free stream disturbances and control surface deflections on the performance of the Wortmann airfoil at low Reynolds numbers
… Reynolds numbers between 50,000 and 500,000. The wind-tunnel testing conducted in the 6'x 6' Stability tunnel included strain-gauge data, pressure data, and flow-visualization studies. The laminar separation bubble which frequently occurs on the upper surface of the wing is found to dominate its …
Page 1 of 4