Lift Enhancement Using IoT-Enabled SMA Micro-Flap on NACA 2412 Airfoil

This research paper investigates the aerodynamic benefits of an adaptive lift enhancement mechanism using a Shape Memory Alloy (SMA)–actuated trailing-edge micro-flap integrated into a NACA 2412 airfoil. The study addresses the inherent limitations of conventional fixed-geometry airfoils operating in low-speed regimes, where increased lift is required without adding mechanical complexity or excessive structural weight.

The proposed system employs Nickel–Titanium (NiTi) SMA wires to induce controlled trailing-edge camber variation through thermally activated phase transformation. Unlike traditional hinged flaps driven by mechanical or hydraulic systems, the SMA-based morphing mechanism enables smooth, continuous deformation of the airfoil surface, reducing flow separation and drag penalties. An IoT-enabled control architecture is conceptually incorporated to regulate SMA actuation, allowing adaptive and responsive aerodynamic control suitable for unmanned aerial vehicles (UAVs) and light aircraft.

A two-dimensional computational fluid dynamics (CFD) analysis is conducted using ANSYS Fluent to evaluate the aerodynamic performance of both baseline and morphed airfoil configurations under identical operating conditions. Pressure contours, velocity distributions, and streamline patterns are analyzed to assess the impact of trailing-edge morphing on lift generation and flow behavior. The results indicate a clear increase in pressure differential across the airfoil surfaces, improved flow attachment near the trailing edge, and an overall enhancement in lift characteristics for the SMA-actuated configuration.

The findings demonstrate that SMA-based morphing micro-flaps provide a practical and lightweight alternative to conventional lift augmentation systems. This research highlights the feasibility of integrating smart materials with embedded electronic control for adaptive aerodynamic surfaces and contributes to the development of efficient, low-complexity morphing technologies for future aerospace applications.