# Jet in Supersonic Crossflow

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 October 16, 2014, 08:40 Jet in Supersonic Crossflow #1 New Member   Join Date: Oct 2014 Posts: 2 Rep Power: 0 Hi everyone, Currently I am doing a project on a lateral jet injection in supersonic cross flow. A plate has a small jet orifice that would inject Sonic air into the freestream. I am simulating a condition that was experimentally done by Dowdy and Newton. Plate Dimension Length : 457.2 mm Width = 444.5 mm Jet Diameter = 2.54mm at 177.8mm from the front of the plate. The conditions are Freestream: M = 2.61 Pressure = 6729.0844 Pa Total Pressure = 136365.925 Pa Temperature = 132.8 K Total Temperature = 313.71 K Jet: M = 1 pressure = 1093075.292 Pa Total Pressure = 2069114.475 Pa Temperature = 247.067 K Total Temperature = 296.48 K I am currently doing a 2D simulation to find out the turbulence intensity to be used and the turbulent length scale before proceeding to modelling this in 3D. For the turbulence intensity it is usually 0.4 of the boundary layer height as given in Fluent Guide, however, i do not know if i should use the full length of the plate 457.2mm for the boundary layer or should i use the length from the front to the jet orifice 177.8mm. Also, would it be advisable to use an Implicit or Explicit method? thanks a lot zherui

 October 19, 2014, 11:35 #2 New Member   Join Date: Oct 2014 Posts: 2 Rep Power: 0 Help please??

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