NUMERICAL COMPUTATIONS OF TURBULENT AND SWIRLING FLOWS IN AXI-SYMMETRICAL COMBUSTOR

Numerical, marching procedure is presented for the calculations of the transport processes in two-dimensional flow characterized by the presence of one coordinate in which physical influences are exerted in only one direction. The differential equations for the transport of mass and momentum with the help of the Prandtle mixing length for turbulence have been solved using the discretization technique. The boundary of the reverse flow zone, which was measured, was introduced to the calculations as an inner boundary. The calculations has been performed for the forward flow passing in the annular space confined by the combustor wall and the reverse flow zone boundary. The boundary of the reverse flow zone was detected accurately, simply and easily by a special flow direction detector probe designed by the author. To verify the calculations, the results were compared with the measured axial and tangential velocities that measured by the Laser Doppler Anemometer. The axial and tangential velocities distributions and the dimensionless stream lines were estimated. The predicted results indicated good agreement with the experimental results.