Testing of turbulent seals for rotor dynamic coefficients. Academic Article uri icon


  • A facility has been developed for dynamic testing of straight and convergent-tapered seals, with the capability of separately determining both direct and cross-coupled stiffness, damping, and added mass coefficients. The test apparatus causes the seal journal to execute small-eccentricity centered circular orbits within its bearings. Dynamic measurements are made and recorded of the seal- displacement-vector components, and of the pressure field. The pressure field is integrated to yield seal reaction-force components. The displacement and force vector components are analyzed via a generalized Newton/Raphson procdure to yield the desired seal dynamic coefficients. Representative test data are provided and discussed. (A)

author list (cited authors)

  • Childs, D. W., Dressman, J. B., & Childs, S. B.

publication date

  • January 1980