Formulas and instructions: API standard 618, Fourth Edition, Appendix O
Instructions:
Enter the ID and length of all components
Enter the gas properties which are used to calculate the speed of sound
Press the "Calculate Helmholtz" button
Cautions/Tips:
The pressure drop through the choke tube should be kept below API 618 pressure drop guideline. Orifice plates may be required to assist in pulsation suppression.
The helmholtz frequency for any system should avoid coincidence with an order of run speed. The helmholtz frequency should ideally be about 70% of the minimum run speed. Alternately the helmholtz frequency can be set between 1 and 2 times run speed.
Disclaimer: All calculations provided at the Beta Machinery Analysis web site are intended for educational use only.
