Three-dimensional flow field downstream of an embedded stator in a multistage axial flow compressor Part 2: deterministic stress and heat flux distribution and average-passage equation system

The results from the area traverse measurements of the unsteady velocity an d total temperature downstream of the second stator of a three-stage axial flow compressor have been correlated to derive various deterministic stress and heat flux terms. These terms are consistent with those arising from th e average-passage equation system of Adamczyk. The deterministic periodic s tress and heat flux terms were found to be lar-er than the aperiodic terms for both the normal and the shear components. Consequently the terms involv ing the aperiodic components in the average-passage equations could be negl ected for stator exit and rotor inlet flow modelling. The deterministic per iodic normal and shear stresses were seen to be most significant in the sta tor wakes away from the end-wall regions. The most significant shear stress correlation was between the axial and the tangential velocity components. Since the correlations involving the radial component were small, it is pos tulated that the dominant mechanism for mixing (in the radial direction) is due to the steady deterministic radial velocity, All three components of d eterministic heat flux were found to be significant in this flow field, esp ecially in the wakes. The dominant terms in the average-passage equation sy stem away from the end walls were due to the tangential gradient compared w ith the radial gradient terms and both the terms were found to be of equal importance in the hub and casing end-wall regions.