Disks rotating at different speeds are found in the internal cooling-air systems of most gas turbines. Defining Γ as the ratio of the rotational speed of the slower disk to that of the faster one then Γ=−1, 0 and +1 represents the three important cases of contra-rotating disks, rotor-stator systems and co-rotating disks, respectively. A finite-volume, axisymmetric, elliptic, multigrid solver, employing a low-Reynolds-number turbulence model, is used for the fluid-dynamics computations in these systems. The complete Γ region, −1⩽Γ⩽+1, is considered for rotational Reynolds numbers of up to and the effect of a radial outflow of cooling air is also included for nondimensional flow rates of up to As Γ→−1, Stewartson-flow occurs with radial outflow in boundary layers on both disks and between which is a core of nonrotating fluid. For Γ≈0, Batchelor-flow occurs, with radial outflow in the boundary layer on the faster disk, inflow on the slower one, and between which is a core of rotating fluid. As Γ→+1, Ekman-layer flow dominates with nonentraining boundary layers on both disks and a rotating core between. Where available, measured velocity distributions are in good agreement with the computed values.
Computation of Flow Between Two Disks Rotating at Different Speeds
Contributed by the International Gas Turbine Institute and presented at the International Gas Turbine and Aeroengine Congress and Exhibition, Amsterdam, The Netherlands, June 3–6, 2002. Manuscript received by the IGTI January 16, 2002. Paper No. 2002-GT-30242. Review Chair: E. Benvenuti.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Kilic, M., and Owen, J. M. (April 23, 2003). "Computation of Flow Between Two Disks Rotating at Different Speeds ." ASME. J. Turbomach. April 2003; 125(2): 394–400. https://doi.org/10.1115/1.1539515
Download citation file:
- Ris (Zotero)
- Reference Manager