White Paper: Thermowell calculations - Emerson

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White paper 00840-0200-2654, Rev AC. March 2014. Thermowell calculations Dirk Bauschke Engineering Manager David Wiklund Senior Principal Engineer Andrew Kitzman Mechanical Design Engineer Danjin Zulic Marketing Engineer Thermowell calculations White paper March 2014 00840-0200-2654, Rev AC. Introduction Thermowells are essentially a circular cylinder installed like a cantilever into the process piping. They provide process condition protection and a process seal for temperature sensors. As a process fluid passes around the Thermowell , low pressure vortices are created on the downstream side in laminar, turbulent, and transitional flow. The combination of stresses, generated by the static in-line drag forces from fluid flow and the dynamic transverse lift forces caused by the alternating vortex shedding, create the potential for fatigue-induced mechanical failures of the Thermowell .

2 White Paper 00840-0200-2654, Rev AC Thermowell Calculations March 2014 Thermowell Calculations 1.1 Introduction Thermowells are essentially a circular cylinder installed like a cantilever into the process piping.

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