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Wednesday, May 6, 2020 | History

2 edition of Ice accretion prediction for a typical commercial transport aircraft found in the catalog.

Ice accretion prediction for a typical commercial transport aircraft

C. S. Bidwell

Ice accretion prediction for a typical commercial transport aircraft

by C. S. Bidwell

  • 182 Want to read
  • 29 Currently reading

Published by National Aeronautics and Space Administration, Lewis Research Center in Cleveland, Ohio .
Written in English

    Subjects:
  • Airplanes -- Ice prevention.,
  • Drag (Aerodynamics),
  • Aerofoils.

  • Edition Notes

    StatementC.S. Bidwell.
    SeriesNASA technical memorandum -- 103693., NASA technical memorandum -- 103693.
    ContributionsUnited States. National Aeronautics and Space Administration., Lewis Research Center.
    The Physical Object
    Pagination21 p. :
    Number of Pages21
    ID Numbers
    Open LibraryOL14686799M

    To mitigate the adverse effects of ice accretion on the operational performance of aircraft (for both unmanned and manned), various anti-/de-icing techniques have been developed and employed to prevent or reduce ice accretion on the aircraft [8–12]. Most of the traditional anti-/de-icing approaches have utilized thermal melting or mechanicalFile Size: 1MB. A Systems-Level Perspective on Engine Ice Accretion [Ryan D. May, Nasa Technical Reports Server (Ntrs), Et Al] on *FREE* shipping on qualifying offers. The accretion of ice in the compression system of commercial gas turbine engines operating in high ice water content conditions is a safety issue being studied by the aviation : D L Simon, R D May, T H Guo.

    The National Aircraft Icing Technology Plan 22 New Proposals for Icing Intensity Definitions 22 Based on LWC 22 Based on Rate of Ice Accretion 22 Based on the Effects on the Aircraft 24 REFERENCES 25 APPENDIX AŠAIAA A WORKABLE, AIRCRAFT-SPECIFIC ICING SEVERITY SCHEME LIST OF TABLES Table Page 1 Airframe Icing Reporting Table 1. Effects of Large-Droplet Ice Accretion on Airfoil and Wing Aerodynamics and Control March Final Report This document is available to the U.S. public through the National Technical Information Service (NTIS), Springfield, Virginia U.S. Department of Transportation Federal Aviation AdministrationFile Size: 5MB.

    This page was last modified on 26 January , at This page has been accessed 1, times. EXPERIMENTAL INVESTIGATION OF SIMULATED ICE ACCRETION ON TURBOPROP AIRCRAFT Table 1 ∆ xAC/MAC Ice accretion position xi/c CL 0 0,,85 0, 0, -0, 0.


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Ice accretion prediction for a typical commercial transport aircraft by C. S. Bidwell Download PDF EPUB FB2

Get this from a library. Ice accretion prediction for a typical commercial transport aircraft. [Colin S Bidwell; United States. National Aeronautics and Space Administration.].

Ice Accretion Calculations for a Commercial Transport Using the LEWICE3D, ICEGRID3D and CMARC Programs NASA/TM— January National Aeronautics and Space Administration Lewis Research Center Prepared for the 37th Aerospace Sciences Meeting & Exhibit sponsored by the American Institute of Aeronautics and AstronauticsFile Size: KB.

In an effort to improve the accuracy of current aircraft ice-accretion prediction tools, experimental and analytical studies have been conducted on airfoils roughened by natural ice accretion.

Ice Accretion Types Observed Four generic types of ice accretion were observed. Ice shape tracings from examples of each type are shown in Fig.

7 for the cm ( in.) cylinder. At cold tem-peratures, Rime accretions were observed with the char-acteristic white ice and conformed ice shape. At warmer temperatures Mixed ice was observed along File Size: 8MB. Except in special aircraft, the hold of an aircraft is usually not pressurized, and the pressure is the same as the atmospheric pressure outside the aircraft The passenger compartment, as I recall.

Aircraft ice accretion prediction using neural network and wavelet packet transform Article (PDF Available) in Aircraft Engineering and Aerospace Technology 88(1) January with aircraft with ice accretion and thus improved safety. These accomplishments in two-dimensional airfoil icing aerodynamics were made primarily through systematic and fundamental experimental studies.

There are many types of ice accretion classified by the physics of the ice accretion process and these labels are more familiar to many Size: 5MB. between ice accretion geometry and the resulting aerodynamic penalty is also important in establishing procedures to determine the most critical ice accretion geometry.

This experimental study focuses primarily on the relationship between airfoil leading-edge Cited by: Prediction of ice accretion and anti-icing heating power on wind turbine blades using standard commercial software.

A methodology for ice accretion prediction using commercial software is proposed. The total size of the mesh of a typical case comprises about 1,25, by: Moderate Icing has been typically described as ice accretion which continues to increase but not at a rate sufficient to affect the safety of the flight unless it continues for an extended period of time, but air speed may be lost.

A definition based upon an ice accretion rate per hour on the outer wing of. the aircraft system. Safety will be achieved in an ice tolerant aircraft if the pilot/aircraft system can continue to maintain the desired flight path, with an acceptable safety margin, regardless of atmospheric icing conditions.

One scenario for a modern approach to an ice tolerant aircraft is: 1. Sense the effect of ice accretion on aircraftFile Size: 1MB. the metal sheet was the nucleus for the ice accretion. Some dispersed ice accretion appeared on the lower surface of the wing back as far as 30% of the wing chord.

The height was some millimeter up to 5 mm with some ice knobs of about 10 mm height. Figure 3 shows the ice accretion on the upper and lower wing surface after 20 minutes exposure to Author: Franz Schröder, Dieter Welte, Thomas Hauf.

Prediction of ice accretion on a full aircraft configuration and the resulting performance degradation is a long-term objective of icing research. However, many issues need to be addressed before routine simulation of full configurations is a reality.

Contributions come from a variety of organizations including NASA, Boeing Aircraft, and Pennsylvania State University, and address aspects of the issue such as fluid dynamics, observational technology, hydrophobic coatings, interaction of meteorological conditions with wing shapes, and a variety of ice accretion test methods.

Accretion on aircraft wings occurs when supercooled water droplets freeze instantaneously on impact to form rime ice or runback as water along the wing to form glaze ice.

Most models to date have ignored the accretion of mixed ice, which is a combination of rime and by: 8. Fig. 2 shows a typical turbofan engine and potential ice accretion sites. Fig 2: Potential ice accretion sites in a typical turbofan engine.

EFFECTS OF ICE CRYSTAL ICING. There are plenty of effects of engine core icing, intake or fan icing. These include: (a) Damage to the fan blade: It may be caused when the frozen deposits from the. Establishing meaningful incremental lift effects due to ice accretions on this class of geometries is typically more dependent upon achieving/identifying representative aerodynamic lift levels and characteristics on the baseline (un-iced) configuration than on the iced one, particularly when using ground-test is because the maximum lift levels achieved by the un-iced designs Cited by: It is very important to simulate ice accretion to develop ice protection systems and to comply with Airworthiness Requirements (FAR/CS, App.

C and very recently, App. O and P). A computational tool is developed for icing analyses in FORTRAN language within the scope of. Courtesy FedFlix, National Archives and Records Administration ICE FORMATION ON AIRCRAFT Department of Defense.

Department of the Navy. Naval Photographic Center. (09/18/   The main models and methods for investigating the process of icing of aerodynamic surfaces, the meteorological parameters of the icing, the cloud types, the types of the ice coating, and the systems of protection against icing are analyzed.

A software is developed which makes it possible to model the icing on the leading edge of the wing airfoil. The motion of the carrying medium is described Cited by: 5. Abstract This article is a systematic and comprehensive review, correlation, and assessment of test results available in the public domain which address the aerodynamic performance and control degradations caused by various types of ice accretions on the lifting surfaces of fixed wing aircraft.Aircraft Icing “2-D Ice accretion prediction” Prof.

Dr. Serkan ÖZGEN Dept. Aerospace Engineering, METU Fall After selecting the baseline aircraft con guration, a set of generic icing mission scenarios were identi ed to determine the critical ice shapes for a typical large transport aircraft.

These scenarios were called the baseline icing conditions and consisted of six aerodynamic cases and seventeen icing conditions.7{9 The aerodynamic solutions of.