Abstract
Experimental and theoretical investigations are reported on noncoaxial turbulent mixing in a rectangular duct. A temperature tracer technique was used to measure the fuel concentration distribution and a surface tufts method to identify the length of the recirculating zone. The governing partial differential equations were solved numerically with the two-equation k-£ turbulence model. Reasonable agreement is demonstrated between the measured and calculated reattachment length and fuel concentration profiles. The effects of air-to-fuel mass ratio, Reynolds number, and side-inlet angle on the position, size, and number of recirculating zones as well as on the mixing pattern are documented. The results of this cold study are believed to be a useful reference to the corresponding hot test.
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