Simulations of Internal Wave Wakes from the Loch Linnhe Trials

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Authors
  1. Tunaley, J.K.E.
Corporate Authors
Defence R&D Canada - Ottawa, Ottawa ONT (CAN);LONDON RESEARCH AND DEVELOPMENT CORPORATION, OTTAWA ON (CAN)
Abstract
Using airborne radar, the Loch Linnhe trials were designed to evaluate the utility of shipgenerated internal wave wakes for maritime surveillance. Many radar wakes were observed. While the crest patterns of internal wave wakes can be understood readily, comprehensive explanations of the amplitudes of the waves are lacking. The purpose of this report is to simulate internal wave wakes using a simple internal layer model and to show that the simulations of the surface flow velocities associated with the wake are consistent with those observed during the trials. Hull details affect the wake and these are not usually available either in trials or operationally even when the ship name is known. Therefore great accuracy is not expected nor is it required. The simulations in this report were conducted in a few seconds on a standard PC. For operational purposes computationally intensive models are not desirable. Satisfactory agreement between simulations and observations has been achieved.

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Report Number
DRDC-OTTAWA-CR-2013-048 — Contractor Report
Date of publication
01 Oct 2013
Number of Pages
44
DSTKIM No
CA037980
CANDIS No
537951
Format(s):
Electronic Document(PDF)

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