INVESTIGATION OF COLD COLORED SMOKE PRODUCTION

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Authors
  1. Liberman, T.
Corporate Authors
Defence Research Establishment Valcartier, Valcartier QUE (CAN)
Abstract
Different methods for producing large colored smoke clouds for use as spotting charges are evaluated. The problem of the disappearance, or "bleaching", of the orange color from vanadium oxytrichloride (VOCl3) clouds during times of high relative humidity is considered. It is postulated that this is caused by the absorption of large quantities of atmospheric moisture by the smoke. A model has been developed to study the process. This model makes the key predictions concerning the absorption of very large amounts of atmospheric moisture by VOC3-type smokes above a relative humidity of 80% and the very small importance of temperature as a parameter. These predictions are, in general, corroborated very well by experiment. Possible solutions to this color bleaching problem are discussed, including one that calls for the synthesis of hydrolyzable vanadium compounds with nonhydroscopic leaving groups.
Report Number
DREV-4372/85 —
Date of publication
15 Aug 1985
Number of Pages
50
DSTKIM No
85-02987
CANDIS No
47779
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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