Low Reynolds Number Effects on Jets from Round, Square and Elliptical Orificesetc15 Tracking Number 401 Presentation: Session: Jets and Wakes 2 Room: Room E Session start: 15:00 Tue 25 Aug 2015 Seyed Sobhan Aleyasin aleyasss@myumanitoba.ca Affifliation: University of Manitoba Mark Tachie Mark.Tachie@umanitoba.ca Affifliation: University of Manitoba Mike Koupriyanov MikeK@priceindustries.com Affifliation: Price Industries Limited Tom Epp TomE@priceindustries.com Affifliation: Price Industries Limited Topics: - Jets and wakes Abstract: An experimental study was undertaken to investigate low Reynolds number effects on mixing characteristics and turbulent transport phenomena in the near and intermediate regions of free orifice jets. The cross-sections examined were round, square and ellipse of aspect ratio 3. For each orifice cross-section, detailed velocity measurements were obtained at the following 4 Reynolds number based on the equivalent diameter and maximum velocity: 2500, 4300, 8500 and 17000. A high resolution particle image velocimetry was used to conduct measurements in the symmetry planes that extend from the exit to 15 equivalent diameters. Preliminary results show that an axis-switching happens at 2.7 equivalent diameters in the case of ellipse nozzle which leads to a higher spread rate compared to square and round ones. Also increase in Reynolds number decreases the jet widths. |