Core-Bypass Mixer Assembly

Create a 3D CAD model of a hydrogen-fueled core–bypass mixer for engineering development and later inspection in CATIA V5R21. **Geometry** Create a central hub, circular core duct, surrounding annular bypass duct, outer shroud, connecting fairing, and a mixer containing 12 equally spaced circumferential lobes. All components must share a common longitudinal axis. Space the lobes at 30-degree intervals. Maintain separate core and bypass flow passages and smooth, continuous geometry wherever possible. **Reference dimensions (SI units)** - Core reference flow area: 0.338702458384 m² - Equivalent core diameter: 0.656695793 m - Outer shroud diameter: 1.695227515 m - Mixer length: 1.313391585 m - Fairing length: 1.3160008 m - Hub radius: 0.010 m - Hub-to-lobe gap: 0.05479656 m - Number of lobes: 12 - Reference fairing angle: 16.90091 degrees Preserve these reference values. Do not silently modify dimensions to make the model fit. Flag any incompatible or ambiguous dimensions. **Modeling requirements** Create editable parametric geometry where supported. Use a clean, organized feature structure. Keep the physical walls distinct from the internal fluid passages if possible. Avoid unnecessary details, textures, labels, and decorative features. Do not invent missing lobe height, width, twist, curvature, penetration angle, profile coordinates, or wall thickness. If exact lobe geometry cannot be determined from the supplied parameters, create the basic mixer structure and identify the lobe profile as incomplete rather than claiming it reproduces the original design. **Output** Generate the 3D CAD model only. Export an editable model or STEP file if supported. Report the actual export format. Do not claim CFD validation, combustion validation, pressure-loss compliance, or engine performance based on geometry alone.

Parameters

Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.