Blockimplicit calculations of threedimensional laminar flow in strongly curved ducts
Abstract
The understanding of flow development in ducts with longitudinal curvature is of interest in the design of aircraft intakes, turbomachinery passages, and heat exchange equipment. The numerical solution of the elliptic partial differential equations governing three dimensional fluid flow in strongly curved rectangular ducts by the use of a fully coupled block implicit solution algorithm is described. Calculations were made for the configuration of Humphrey et al. It is observed that the coupled solution of the momentum and continuity equation converges rapidly and reduces the required computing time by a factor of two and a half over a decoupled solution such as that by Humphrey et al. The flowfield calculated here is in good agreement with the experimental data and with previous calculations. The flow separation on the outer side wall is well predicted, in conformity with earlier observations.
 Publication:

Presented at the 21st AIAA/ASME/SAE Joint Propulsion Conf
 Pub Date:
 March 1985
 Bibcode:
 1985jpmc.rept.....V
 Keywords:

 Contours;
 Ducts;
 Finite Difference Theory;
 Flow Distribution;
 Laminar Flow;
 Separated Flow;
 Shapes;
 Surfaces;
 Three Dimensional Flow;
 Algorithms;
 Boundary Layer Separation;
 Computation;
 Ducted Flow;
 Partial Differential Equations;
 Fluid Mechanics and Heat Transfer