Abstract
The axial velocity component of three and four jet arrays impinging on a flat plate have been measured using a laser Doppler anemometer. the axial velocity profiles for all jets were found to demonstrate characteristics of a turbulent jet in its potential core region. Between neighboring jets, reversal of the airflow occurred. At measurements closer to the flat plate, the reverse flow velocity values were found to be about 50% of the maximum jet velocity. the results indicated that the products passing under multiple jets may experience uneven heating rates, depending upon the product size and jet orifice spacing.
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