Abstract
The mean and turbulent flowfields of turbulent jet issuing from a rectangular nozzle (AR: Aspect Ratio = 12.5) with a rectangular notch at the midspan, have been investigated, experimentally. The object of this experiment is to investigate a possibility of the operation of both the mean and the turbulent velocity fields in the rectangular jet field by the attachment of a rectangular notch perpendicular to the rectangular jet. Four notch aspect ratios (NAR: Notch Aspect Ratio) of the rectangular notch used were 2.5, 7.5, 12.5 and 165, respectively.
Highlights
The mean and turbulent flow fields of turbulent jet issuing from the rectangular nozzle with a rectangular notch at the midspan, have been investigated, experimentally
The object of this experiment is to investigate a possibility of the operation of both the mean and turbulent velocity fields in the rectangular jet by the attachment of a rectangular notch perpendicular to the rectangular jet
The magnitude of the inward secondary flow on the z axis can be operated by the value of notch aspect ratios (NAR)
Summary
The mean and turbulent flow fields of turbulent jet issuing from the rectangular nozzle with a rectangular notch at the midspan, have been investigated, experimentally. In the cases of the employment of the rectangular jet to the engineering fields, the elongation of the jet flow is expected in many industrial situations, for example the washing in liquid by multiple parallel jets, the uniform plating technique [3], the acid washing process of rolling mill and the air curtain (air shield and ventilating). To these technical assignments, extension of the potential core length and suppression of the turbulent intensities seem to be effective methods. Marsters and Accepted: July 18, 2018; Published online: July 20, 2018
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