Wind Tunnel
Wind Tunnel - Related Videos
09:23
Turbulence Sphere Method: Evaluating Wind Tunnel Flow Quality
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2023
Source: Jose Roberto Moreto and Xiaofeng Liu, Department of Aerospace Engineering, San Diego State University, San Diego, CA Wind tunnel tests are useful in the design of vehicles and structures that are subjected to airflow during their use. Wind tunnel data are generated by applying a controlled air flow to a model of the object being studied. The test model usually has a similar geometry but is a smaller scale compared to the full-sized object. To ensure accurate and useful data is collected...
05:25
A Wind Tunnel for Odor Mediated Insect Behavioural Assays
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Cited by 12 •
2018
Here, we describe the construction and use of a wind tunnel for odor mediated behavioural assays with insects. The wind tunnel design facilitates the release of odor sources by several methods, with and without visual stimuli. Wind tunnel experiments are important methods to identify behaviorally active volatile chemicals.
09:27
Wind Tunnel Experiments to Study Chaparral Crown Fires
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Cited by 7 •
2017
This protocol describes wind tunnel experiments designed to study the transition of a fire from the ground to the canopy of chaparral shrubs.
01:19
Three-Winding Transformers
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2024
Three identical single-phase transformers can be configured to form a three-phase transformer connection, which involves high-voltage and low-voltage windings. The high-voltage windings are denoted by capital letters A-B-C, while the low-voltage windings are labeled with lowercase letters a-b-c, representing their respective phases. This notation helps distinguish between the high and low voltage sides of the transformer. In the per-unit equivalent circuit of a grounded Y-Y three-phase...
01:24
Wind Turbine Machine Models
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2024
In the growing field of wind energy, incorporating wind turbine models into transient stability analysis is essential. Induction and synchronous machines are the primary models used, with induction machines being prevalent due to their simplicity and reliability. Induction machines interact through the rotating magnetic field generated by the stator and the rotor. The key parameter is slip, which is the difference between synchronous speed and rotor speed relative to synchronous speed. Slip is...
FAQs
Fans or compressors establish the airflow, while the test section provides a defined region for observing the model’s response. Within that region, instruments can capture lift, drag, pressure distribution, turbulence, and flow separation. Examining these quantities together shows not only how much force acts on an object, but also how the surrounding flow produces it.
Changing airflow speed and environmental conditions gives engineers a controlled way to examine how aerodynamic behavior changes. Keeping those conditions defined makes measurements comparable across models or design versions, while varying them reveals whether performance, stability, or efficiency is sensitive to the tested operating range. This control is central to drawing conclusions from repeated experiments.
Unlike a full-scale flight or construction trial, a wind tunnel study evaluates a stationary model before the complete object is built or operated. This allows engineers to investigate designs under defined conditions before committing to full-scale testing. Its value is repeatability: teams can compare alternatives and use measured results to guide later design decisions.
Lift and drag quantify important aerodynamic forces, whereas pressure distribution shows how loading is arranged across the model. Turbulence and flow separation add information about the behavior of airflow around it. Together, these measurements help engineers identify design effects that may influence performance, stability, safety, and energy efficiency rather than relying on a single force value.
A typical investigation begins by selecting a model and placing it in the test section, then driving air with fans or compressors. Engineers establish the desired speed and environmental conditions, collect measurements during the run, and compare the resulting aerodynamic data across cases. This workflow supports repeatable evaluation of alternative designs before full-scale construction or flight testing.
Wind tunnel testing applies to many engineering designs exposed to moving air, including aircraft, automobiles, buildings, bridges, and wind turbines. The same experimental approach can address different design questions, from aerodynamic performance to airflow effects on structures. Results inform refinement intended to improve performance, stability, safety, or energy efficiency.