Mixing in hypervelocity flows

This study considers analysis of data obtained from tests with a generic co mbustor model at the pulse facility T5 located in the Graduate Aeronautical Laboratories at California Institute of Technology (GALCIT). Comparisons w ere made between the flow predictions using Baldwin-Lomas and k-epsilon tur bulence models. Computed predictions of mixing efficiency, wall pressure si gnatures, eddy viscosity distributions, etc., obtained from both the turbul ence models were similar. Computed wall pressure distributions agreed with those from experiments. Spatial uniformity of the injectant-test gas mixtur e was considered. Based on the results obtained, use of the Baldwin-Lomax t urbulence model can be considered to be sufficient for the conditions consi dered, as it yields adequate predictions with significant savings in comput ational costs.