Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Aeronautic wind shear and turbulence. A review for forecasts
SMHI, Research Department.
1989 (English)Report (Other academic)
Abstract [en]

'Turbulence' in flight operations means all inhomogeneities in the wind field which cause unexpected deviations from the aircraft's intended flight path. It utters itself as bumpiness, which in extreme cases also may cause severe discomfort to passengers and crew, and even be dangerous because persons and loose objects may be tossed around. Even more serious is that in extreme cases the pilot may lose his control of the aircraft, and/or the aircraft may be damaged.

This is most serious when an aircraft is heavy loaded and flying at a speed just above its stalling speed, as in take-off.

'Turbulence' is related to the shear of the wind. A sharp wind shear by itself affects the aircraft; due to its inertia the aircraft tries to keep its speed relative to the ground also when the surrounding air has changed it. This affects the lifting forece, causing an acceleration and a change in the aircraft's attitude.

lf the air flow is laminar, shear does not produce turbulence. However, even if turbulence needs not to be present in strong shear at low altitudes ( NCR, 1983, after Lee and Beckwith, 1981 ) laminary flow belongs to the laboratory, not the atmosphere. In this manual we will mainly talk about wind shear, since this is a meteorological parameter that at least in principle is possible to measure. It has to be understood that wind shear is nearly always accompanied by turbulence (or bumpiness).

Some forecasting hints will be given in the text. The most important one will, however, be given already here:

Place, publisher, year, edition, pages
SMHI , 1989. , p. 63
Series
Meteorology, ISSN 0283-7730 ; 74
Keywords [sv]
flygplan, flygmeteorologi, turbulens
National Category
Meteorology and Atmospheric Sciences
Research subject
Meteorology
Identifiers
URN: urn:nbn:se:smhi:diva-2380Local ID: Meteorologi, Rapporter, Serie MeteorologiOAI: oai:DiVA.org:smhi-2380DiVA, id: diva2:947673
Available from: 1989-05-13 Created: 2016-07-08 Last updated: 2020-04-14Bibliographically approved

Open Access in DiVA

fulltext(6428 kB)3 downloads
File information
File name FULLTEXT01.pdfFile size 6428 kBChecksum SHA-512
fa767b581fe96ee3e239609e7ab6ce7da5c5e611a5ba4e1b6c6d460dd3b8756254c4740dd3c7772fca4785e5d3a87068426ce73fe4fb4c9af7f825fb473e5823
Type fulltextMimetype application/pdf

By organisation
Research Department
Meteorology and Atmospheric Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 3 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 24 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf