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Subsonic Educational Wind Tunnel: Aerodynamic Test Bed · 模型 135469

作者：Sonal Garg

Project Overview: This project documents the 3D CAD design and Computational Fluid Dynamics (CFD) analysis of an open-circuit, low-speed wind tunnel. The system was engineered to provide a controlled, predictable fluid environment for testing small-scale aerodynamic models, such as wing airfoils and hand-launched gliders, at low Reynolds numbers. Technical Specifications: Design Software: Autodesk Fusion 360 Simulation Software: SimScale Tunnel Architecture: Open-Circuit, Suction-Type Key Design Features: Features a smooth contraction cone to systematically accelerate airflow into the test section, and a rear diffuser to recover static pressure. (Note: The physical honeycomb flow straightener was excluded from the internal fluid volume extraction to optimize the computational mesh and solver stability). Simulation Setup: Solver: Incompressible, steady-state internal flow. Fluid Material: Air (Standard Atmospheric). Inlet Boundary Condition: Velocity Inlet set to 30 m/s. Outlet Boundary Condition: Pressure Outlet set to 0 Pa (gauge). Wall Conditions: No-Slip walls applied to the internal boundary of the tunnel housing. Key Findings & Aerodynamic Analysis: Velocity Profiles (Continuity Principle): The cut-plane results demonstrate a successful acceleration of flow as air moves from the settling chamber through the contraction cone, validating the Principle of Continuity. Streamline Behavior: Particle trace analysis shows tightly packed, linear flow through the test section, confirming the geometry produces a uniform testing environment. Flow Separation: Post-processing revealed mild flow separation and swirling along the walls of the rear diffuser. This highlights a realistic aerodynamic limitation and indicates that reducing the expansion angle of the diffuser would be the primary focus for a future design iteration. Surface Pressure: Stagnation points were clearly visualized at the inlet lip, with the expected pressure drop occurring inside the high-velocity test section in accordance with Bernoulli's Principle. Files Included: The complete wind tunnel fluid-domain model is provided in STEP (.stp) format for maximum cross-platform compatibility. High-resolution CFD post-processing imagery (Velocity cut-planes, Pressure contours, and Streamlines) are included in the gallery to validate the design's aerodynamic performance.

格式

Rendering、STEP / IGES

分类

Aerospace、Aviation、Educational

标签

airfoiltesting、aerodynamics、cfd、fusion360、simscale、windtunnel

数据更新

2026-10-15T16:49:41Z

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