scholarly journals Optimization of orifice geometry for cross-flow mixing in a cylindrical duct

1994 ◽  
Author(s):  
W. Sowa ◽  
J. Kroll ◽  
G. Samuelsen ◽  
J. Holdeman
Keyword(s):  
Cross Flow ◽  
Flow Mixing ◽  
Cylindrical Duct

scholarly journals T-junction cross-flow mixing with thermally driven density stratification

2016 ◽  
Vol 309 ◽  
pp. 23-39 ◽  
Author(s):  
John Kickhofel ◽  
Horst-Michael Prasser ◽  
P. Karthick Selvam ◽  
Eckart Laurien ◽  
Rudi Kulenovic
Keyword(s):  
Cross Flow ◽  
Density Stratification ◽  
Flow Mixing ◽  
Thermally Driven

Structure of Turbulent Flow in Subchannel of Rod Bundle Downstream of Spacer Grid With Hybrid Flow Mixing Device

2002 ◽  
Author(s):  
Dong Seok Oh ◽  
Wang Kee In ◽  
Tae Hyun Chun
Keyword(s):  
Rectangular Channel ◽  
Cross Flow ◽  
Mixing Efficiency ◽  
Lateral Velocity ◽  
Spacer Grid ◽  
Turbulent Diffusion Coefficient ◽  
Rod Bundle ◽  
Flow Mixing ◽  
A Cell ◽  
Rod Array

An experiment was performed in a wind tunnel to investigate the flow structure in a rod bundle with a hybrid vane grid. The hybrid vane is a flow-mixing device, which consists of two pairs of primary and secondary vanes in a cell. The test section is a rectangular channel (300 mm × 300 mm × 2400 mm) including 3 × 3 rod (75 mm diameter) array with a spacer grid. The pitch to diameter ratio of the rod array is 1.33. The flow structures downstream the grid are measured at Reynolds number of 1.2 × 105 for 35-degree deflecting angle of the hybrid flow-mixing vane. The data are obtained for the distributions of the time mean axial velocity, lateral velocity, and turbulent intensities in 3 component directions over a center subchannel along axial locations and compared with the previous results of split vane grid that has two vanes in a cell. The results show that the mixing efficiency of the hybrid vane grid could be similar with that of the split vane grid because swirl factor of the hybrid vane grid is higher than that of split vane grid and the magnitude of axial turbulent intensity, turbulent diffusion coefficient, and cross flow factor is similar to each other in spite of differences of the vane numbers and shape in a cell between hybrid and split vane grids.

Numerical Simulation of Jet and Cross-Flow Mixing in Tee Pipe

2014 ◽  
Vol 960-961 ◽  
pp. 523-527
Author(s):  
Guo Bing Kang
Keyword(s):  
Near Field ◽  
Cross Flow ◽  
Experimental Result ◽  
Pipe Diameter ◽  
Injection Point ◽  
Mixing Effect ◽  
Inlet Velocity ◽  
Flow Mixing ◽  
Mixing Parameter ◽  
Cross Flow Velocity

In the present paper we investigated the mixing effect of uncompressible jet and cross-flow in Tee pipe based CFD, the model of Realizable was employed as the tool to simulate the flow field, and the model was validated by experimental result of relative research. The mixing effect of jet and cross-flow in various configuration of Tee pipe at different inlet velocity of jet was discussed. The result shows jet and cross-flow mix quickly in near field of injection point, but in the downstream, the mixing effect keeps comparatively steady whenz>7d, and there is power relation between the mixing parameterMandr1×r2. Andr1is the ratio of jet pipe diameter to cross-flow pipe diameter,r2is the ratio of jet velocity to cross-flow velocity.

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