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 112 for “"icing"”.
-
Inflight Characterization of Aircraft Icing
… an additional layer of safety against aircraft icing accidents, by presenting and validating a conceptual design for the icing characterization function of the IMS. This icing characterization function seeks to provide a near real-time estimate of the degradation of the aircraft flight dynamics …
-
Pulse de-icing for aircraft applications
… on aircraft is a major problem in aviation. Icing is directly responsible for fatal aircraft incidents, limiting the safety of air travel and requiring expensive, inefficient, and sometimes ineffective de-icing strategies. In this work, we develop and study electro-thermal pulse deicing …
-
Development of improved aircraft de-icing fluids
… improved thickening agents of aircraft de-/anti-icing fluids is investigated. Current fluid thickeners commonly comprise PAA homo or co polymers and two examples are investigated in terms of their structure, characteristics, size and the rheological profile as aqueous and solutions in a typical …
-
Aircraft De-Icing System Using Thermal Conductive Fibers
… heating voltage is selected for effective de-icing via distinct avenues of heating system configurations. The heat transfer efficiency of the system is theoretically analyzed and validated through experimental results. The advantages of the carbon-fiber based de-icing system are addressed in …
-
Effects of Supercooled Large -Droplet Icing on Airfoil Aerodynamics
The effects of simulated ice shape on the NLF 0414 were quite different from the NACA 23012m. There was little variation of lift when the simulated ice-shape location was varied from 2% to 20% chord. The large losses in lift occurred when the ice shape was located downstream of 30% chord, and the …
-
A Simplified Icing Model for Simulation and Analysis of Dynamic Effects
… components such as antennas and intakes. Glaze icing is dangerous because as the amount of ice increases, it alters the shape and properties of the aerodynamic surface. Wind tunnel tests of this type of icing and data analysis have shown that the main effects of icing consist of decrease of lift …
-
Evaluation of the Impact of Anti-Icing Solution on Concrete Durability
… and infrastructure damage. The process of anti-icing works through the application of the liquid anti-icing brine to the dry pavement surface prior to a storm event to prevent the formation or development of bonded snow and ice. The proactive anti-icing strategy provides a 34% reduction in the …
-
Cockpit weather information system requirements for flight operations in icing conditions
… information systems for flight operations in icing conditions were investigated. Pilot information needs were investigated in a web-based survey. Results identified important information elements, frequently used information paths for obtaining icing-related information, and data on …
-
The Effect of Icing on the Dispatch Reliability of Small Aircraft
… how one weather phenomenon, in-flight icing, affects the dispatch reliability of this transportation system. Specifically, this research presumes that a route is considered a "no-go" for low time pilots in a small, piston powered aircraft if any icing conditions are forecast along the …
-
Numerical Modeling of Anti-Icing Using an Array of Heated Synthetic Jets
<p>A novel approach to icing control using an array of thermally activated synthetic jet actuators (SJAs) embedded in a wedge surface subject to a super-cooled flow is investigated numerically. The effects of SJA actuation with and without jet heating on ice accretion are studied using the …
-
An Archival Analysis of Stall Warning System Effectiveness During Airborne Icing Encounters
… aircrew decision-making outcomes during airborne icing encounters. A Conservative Icing Response Bias (CIRB) model was developed to explain the historical variability in aircrew performance in the face of airframe icing. The model combined Bayes’ Theorem with Signal Detection Theory (SDT) concepts …
-
Design of 3D swept wing hybrid models for icing wind tunnel tests
The study of aircraft icing is critical to ensure the safety of any aircraft that might experience icing conditions in flight, including general, commercial, and military aviation. The certification of modern commercial transports requires manufacturers to demonstrate that these aircraft can safely …
-
Lagrangian Parcel Volume method applied to icing surfaces to predict impact efficiency
When trying to predict how and where ice will accrete on an aircraft, engineers first need to be able to track the path and concentration of water particles; this will allow for a better representation of water impingement and ice accretion. This tracking can be accomplished by using either a …
-
Interfacial engineering to control phase transitions : applications in icing and mineral scale fouling
Icing and scale fouling affect the functioning of a number of industries. The problems due to ice accretion have been prevalent for decades in a number of systems including aircrafts, wind turbines and power lines. Similarly, scale formation is one of the major problems that currently plague a …
-
Finite Element Modeling of Macro Fiber Composite Actuators with Application to Wing De-icing
<p>Icing can have a profound impact on aircraft performance during inclement weather conditions. Aircraft icing primarily occurs on the leading edge of wings, tails and engines. The de-icing/anti-icing technologies currently in use are typically bulky, heavy, cover the entire airfoil surface and …
-
Simulations of droplet dispersion in the wakes of cylinders and icing tunnel spray bars
… behind cylinder wakes and downstream of icing tunnel spray bars were conducted. In both cases, a range of droplet sizes were investigated numerically with a Lagrangian particle trajectory approach while the turbulent air flow was investigated with a hybrid Reynolds-Averaged …
-
Aircraft Anti-Icing Analysis: Water Droplet Dynamics Under High-Frequency Atomization and Superhydrophobic Effects
Structural icing is a significant engineering challenge that has prompted extensive research into thermal and mechanical preventive measures. Common solutions involve the spraying of de-icing chemicals and high-power consumption heating systems for larger aircraft that add to the weight. Still, …
-
Forecast Verification of the Current Icing Potential (CIP) to Predict Lightning Hazards at U.S. Spaceports
… of the Aviation Weather Center’s Current Icing Potential (CIP) diagnostic model indicated a potentially high correlation between lightning activity and icing potential. A forecast verification study and supporting representative case studies were conducted to quantify the CIP’s ability to …
Page 1 of 6