Overview of Icing Research at Nasa Glenn

Overview of Icing Research at Nasa Glenn

Author: Richard E. Kreeger

Publisher: BiblioGov

Published: 2013-06

Total Pages: 40

ISBN-13: 9781289051433

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The aviation industry continues to deal with icing-related incidents and accidents on a regular basis. Air traffic continues to increase, placing more aircraft in adverse icing conditions more frequently and for longer periods. Icing conditions once considered rare or of little consequence, such as super-cooled large droplet icing or high altitude ice crystals, have emerged as major concerns for modern aviation. Because of this, there is a need to better understand the atmospheric environment, the fundamental mechanisms and characteristics of ice growth, and the aerodynamic effects due to icing, as well as how best to protect these aircraft. The icing branch at NASA Glenn continues to develop icing simulation methods and engineering tools to address current aviation safety issues in airframe, engine and rotorcraft icing.


Icing Cloud Calibration of the NASA Glenn Icing Research Tunnel

Icing Cloud Calibration of the NASA Glenn Icing Research Tunnel

Author: Robert F. Ide

Publisher:

Published: 2001

Total Pages: 28

ISBN-13:

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The icing research tunnel at the NASA Glenn Research Center underwent a major rehabilitation in 1999, necessitating recalibration of the icing clouds. This report describes the methods used in the recalibration, including the procedure used to establish a uniform icing cloud and the use of a standard icing blade technique for measurement of liquid water content. The instruments and methods used to perform the droplet size calibration are also described. The liquid water content/droplet size operating envelopes of the icing tunnel are shown for a range of airspeeds and compared to the FAA icing certification criteria. The capabilities of the IRT to produce large droplet icing clouds is also detailed.


We Freeze to Please

We Freeze to Please

Author: William M. Leary

Publisher:

Published: 2002

Total Pages: 224

ISBN-13:

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This is the story of a unique facility that has made unparalleled contributions to a specialized area of aeronautics research that affects virtually all who fly.


We Freeze to Please

We Freeze to Please

Author: William Leary

Publisher: CreateSpace

Published: 2014-04-16

Total Pages: 218

ISBN-13: 9781499171167

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The formation of ice on wings and other control surfaces of airplanes is one of the oldest and most vexing problems that aircraft engineers and scientists continue to face. While no easy, comprehensive answers exist, the staff at NASA's Icing Research Tunnel at the Glenn Research Center in Cleveland has done pioneering work to make flight safer for experimental, commercial, and military consumers.


An Overview of Shed Ice Impact in the NASA Lewis Icing Research Tunnel

An Overview of Shed Ice Impact in the NASA Lewis Icing Research Tunnel

Author: National Aeronautics and Space Administration (NASA)

Publisher: Createspace Independent Publishing Platform

Published: 2018-08-16

Total Pages: 30

ISBN-13: 9781725107144

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One of the areas of active research in commercial and military rotorcraft is directed toward developing the capability of sustained flight in icing conditions. The emphasis to date has been on the accretion and subsequent shedding of ice in an icing environment, where the shedding may be natural or induced. Historically, shed-ice particles have been a problem for aircraft, particularly rotorcraft. Because of the high particle velocities involved, damage to a fuselage or other airframe component from a shed-ice impact can be significant. Design rules for damage tolerance from shed-ice impact are not well developed because of a lack of experimental data. Thus, NASA Lewis (LeRC) has begun an effort to develop a database of impact force and energy resulting from shed ice. This effort consisted of a test of NASA LeRC's Model Rotor Test Rig (MRTR) in the Icing Research Tunnel (IRT). Both natural shedding and forced shedding were investigated. Forced shedding was achieved by fitting the rotor blades with Small Tube Pneumatic (STP) deicer boots manufactured by BF Goodrich. A detailed description of the test is given as well as the design of a new impact sensor which measures the force-time history of an impacting ice fragment. A brief discussion of the procedure to infer impact energy from a force-time trace are required for the impact-energy calculations. Recommendations and future plans for this research area are also provided. Bond, Thomas H. and Britton, Randall K. Glenn Research Center NASA-TM-105969, E-7492, NAS 1.15:105969, AIAA PAPER 93-0301 ...