Flow Characteristic Study of Contraction of Compressor Intermediate S-Shaped Duct Facility

Abstract

This paper presents the influence of wall contours on a circular cross-section contraction nozzle of compressor intermediate S-shaped duct facility. Flow uniformity and boundary layer development under different wall contours are examined by using numerical simulations. Effect of wall shape on the pressure loss within the contraction is examined, and the maximum difference of pressure loss between the two wall shapes is about 84 Pa. Higher-order equation encounters higher pressure loss due to secondary flow generation and thicker boundary layer development. CT#4 (marched cubic case) shows the minimum value of $$U:{n}$$ and standard deviation at the outlet of contraction which indicates the lowest non-uniformity among all cases.