Accession Number : ADA180813

Title :   Superstructure Flow Distortion Corrections for Wind Speed and Direction Measurements Made From VIRGINIA Class (CGN38-CGN41) Ships.

Descriptive Note : Final rept.,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON DC

Personal Author(s) : Blanc,Theodore V.

Report Date : 10 APR 1987

Pagination or Media Count : 28

Abstract : The available literature describing the errors in wind measurements produced by the flow distribution around ships, masts, and towers is briefly reviewed. It is demonstrated that the wind speed and direction measurements made from the standard anemometer locations onboard a Virginia class ship are distorted by the wind blockage produced by the ship's superstructure, mast, and antennas. Even though the wind measurements are made near the top of the forwardmost mast, the wind speed error was found to be as large as 20% and the wind direction error as large as 5 deg. A correction scheme for determining the true wind speed and direction is presented.

Descriptors :   *WIND DIRECTION, *WIND VELOCITY, ANEMOMETERS, ANTENNAS, CORRECTIONS, DISTORTION, DISTRIBUTION, ERRORS, FLOW, MEASUREMENT, POSITION(LOCATION), SHIPS, SUPERSTRUCTURES, TOWERS, WIND, CRUISERS, AIR FLOW

Subject Categories : Meteorology

Distribution Statement : APPROVED FOR PUBLIC RELEASE