Case Study: Wall Pressure Fluctuation Measurements Using GRAS UTP Microphones

Wall pressure fluctuations play a vital role in evaluating surface interactions within aerodynamic and acoustic environments. However, traditional sensor installations often require drilling into the test surface, a method that is not ideal—or even feasible—for many industrial applications. To address this, GRAS ultra-thin-precision (UTP) microphones, with a thickness of just 1 mm, provide a practical alternative by enabling surface mounting without sacrificing measurement accuracy. In this study, three different mounting configurations were assessed: flush-mounted, pinhole-mounted, and faring-mounted (with a 7.5° elevation angle).

If you're interested in the full details of this study, you can download the complete case study using the link below.

• Introduction

• Experimental setup

• Hydrodynamic wall pressure fluctuations measurements

• Mean flow statistics

• Measured and corrected spectra

• Acoustic wall pressure measurements

• Conclusion

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