Abstract
A new experimental method using a laser sheet and thermocouples is developed to evaluate an intuitive criterion for a smoke front tracking based on temperature change. From synchronized pictures of the smoke front along with temperature signals, the intuitive criterion is shown to be acceptable. The smoke visualization by the laser sheet proves to have several advantages over the conventional techniques such as the use of smoke generators. The speed of the smoke front is measured by thermocouples and by the laser-sheet visualization. These are compared to show good agreement in the fully developed ceiling jet region.
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