An approximate method for calculating the mean streamlines of the direct problem of an open rotor
Abstract
As part of a program to analyze secondary flows in a rotor, an approximate method was utilized to obtain the mean streamlines through the rotor. The mean streamlines were calculated by means of an iterative procedure which simultaneously satisfies the principles of conservation of energy, momentum and continuity for incompressible flow. The procedure used to calculate the flow mean streamlines is a version of the streamline curvature method. For the direct method, it is necessary to determine the outlet flow angles for the rotor blade sections. This angle is a combination of the metal blade angle and a deviation angle. An approximate method for calculating this deviation angle is described which is based on available experimental data. A good correlation between predicted data and experimental measurements has been obtained using this direct analysis method for the mean streamlines.
 Publication:

NASA STI/Recon Technical Report N
 Pub Date:
 May 1978
 Bibcode:
 1978STIN...7833388B
 Keywords:

 Flow Distribution;
 Rotor Blades (Turbomachinery);
 Secondary Flow;
 Analysis (Mathematics);
 Hydrodynamics;
 Incompressible Flow;
 Potential Flow;
 Fluid Mechanics and Heat Transfer