ANALYSIS OF 2-D AND 3-D UNSTEADY ANNULAR FLOWS WITH OSCILLATING BOUNDARIES, BASED ON A TIME-DEPENDENT COORDINATE TRANSFORMATION

The paper presents 2-D and 3-D solutions for unsteady annular, viscous laminar flows between oscillating cylinders, which are accurate for both large and small amplitude oscillations. These solutions are obtained with a newly developed method based on a time-dependent coordinate transformation, which permits a rigorous implementation of the boundary conditions on the moving boundaries, without resorting to any restrictive assumptions. The solutions are compared with previous results obtained for the 2-D case with methods based on the small amplitude assumption. It was found that the two sets of results are increasingly different for larger amplitudes of oscillations, especially as regards the imaginary components of the unsteady pressure, which determine its phase lag with respect to the solid wall oscillations (of interest in flow-induced vibration analysis). Furthermore, 3-D solutions are obtained for both uniform annular passages and configurations with an annular backstep, subjected or not to axial flow. The solutions are also compared with unsteady pressure measurements made by the authors. Very good agreement was found between the solutions and the experimental results.

  • Supplemental Notes:
    • J Fluids and Structures, v 10 n 1, Jan 1996, p 57 [21 p, 20 ref, 1 tab, 11 fig]
  • Authors:
    • Mateescu, D
    • Mekanik, A
    • Paidoussis, M P
  • Publication Date: 1996

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00727779
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Nov 4 1996 12:00AM