Abstract
An inward-turning, high-speed, and shape-transitioned intake is investigated using CFD to identify the overall flow structure and explore the unsteadiness present in the flow. The intake is created by stitching unique truncated Busemann diffuser contours with a pre-defined Internal Conical Flow-A solution. This new streamline provides efficient compression, high flow uniformity, and straight leading edge shock waves. The lower surface is constructed by using parallel streamlines provided by the analytical solution. These two-dimensional flowfields are combined through the Osculating Axisymmetric method to create a new method of high-speed intake design, labeled the Osculating Internal Waverider Intake with Parallel Streamlines (OIWPS). The intake in this study is dubbed the INlet for the Indiana universities that contributed to the project. Experimental testing is ongoing and show interesting flow physics. Improved Delayed Detached Eddy Simulation (IDDES), unsteady laminar, and transitional model Reynolds-averaged Navier-Stokes (RANS) calculations are carried out to provide insight for the experiments and determine the overall flow structure and unsteadiness occurring in the INlet. These computational results show significant separation in the laminar case, and vortex formation in the transitional RANS and the IDDES.
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