Neo Stereolithography Models for Advanced Aerospace Wind Tunnel Testing

Embry-Riddle Aeronautical University in conjunction with Stratasys will discuss some case studies using stereolithography 3D printed models for advanced wind tunnel testing. Compared to traditional CNC machining, fabrication of 3D printed models built on Stratasys Neo SLA printers can significantly accelerate model production (days vs. months) and provide huge cost savings – with the same level of surface finish and part strength as traditional metallic or wood models.

This presentation will showcase the application of SLA printed models for PIV (Particle Image Velocimetry) wind tunnel testing. Experimental results show that Neo printed SLA models are highly compatible with laser and optical measurement techniques. Additionally, models printed using Somos® PerFORM Reflect resin can effectively mitigate surface reflection from the laser light which is a common issue when using a high-intensity laser as a light source for near-wall flow field measurements. Since PerFORM Reflect is an orange resin, there is no need to apply a non-reflective matt black coating to achieve this goal. Thus, greatly simplifying the process of preparing models for the PIV test.

Another study case to be presented is 3D printing a wing model with surface pressure taps and internal channels. SLA printers can provide high precision in manufacturing a model for pressure measurements across a sample surface. The pressure taps are integrated with correct orientation to the model surface to ensure accurate readings during pressure measurement. The results will be benchmarked against standard models built by traditional machining processes.