NASA Model Wing Lights Up During First Pressure Sensitive Paint Tests

Groundbreaking tests at NASA’s Langley Research Center in Hampton, Virginia, are paving the way for new wind tunnel capabilities for designing the aircraft technologies of the future.

In a first-of-its-kind test in NASA Langley’s Transonic Dynamics Tunnel, researchers used unsteady Pressure Sensitive Paint to study how air flows around a standard wind tunnel model known as the Benchmark Supercritical Wing. As the team observed the test, the paint’s special capabilities made the model wing glow pink-purple when exposed to special ultraviolet lights, while high-speed cameras captured every detail.

The test combined two valuable NASA tools. NASA’s benchmark wings don’t represent a particular type of aircraft, rather they are meant as universal models to help researchers improve computer modeling using wind tunnel data.

Unsteady pressure sensitive paint is a specialized coating that varies in brightness according to how much pressure the air flow applies to the wing. High-speed cameras capture those changes, providing data for computer models. For years, NASA researchers at centers including Langley and the agency’s Ames Research Center in California’s Silicon Valley have been working to integrate the paint into wind tunnel tests for aircraft and rockets. NASA researchers consider the paint a vital tool and expect to find many more wind tunnel applications in the future.

This test marked the technique’s first use on a large-scale, freely moving model in a low‑oxygen environment, an achievement made possible by the Transonic Dynamic Tunnel’s unique testing capabilities.

This milestone opens the door for upcoming tests on flexible aircraft models that are designed to bend and adapt during flight to improve efficiency. It also lays the foundation for better simulations and designs as NASA advances the future of flight.

Full text from nasa.gov (public domain).