How do you analyze thermowell wake frequency to prevent failure?

Thermowell wake frequency analysis per ASME PTC 19.3 TW-2016 ensures mechanical integrity in high-velocity flows. Calculate natural frequency (fn) based on thermowell geometry and material, and Strouhal frequency (fs) from fluid velocity and thermowell diameter. Design criterion: natural frequency must exceed Strouhal frequency with adequate margin (fn/fs > 1.0, typically >1.2). Evaluate for in-line and transverse resonance modes. Solutions for failing designs include: reduced insertion length, increased tip thickness, step-shank design, or velocity limiting. Use computational methods (FEA) for complex geometries or validate with experimental modal analysis.