Effect of angle-of-turn on the performance of divided intake ducts

Abstract

Investigations using computational¯uid dynamics (CFD) have been carried out on divided intake ducts having angles-of-turn as 22.58/22.58, 308/308 and 458/458 and area ratios of 2 and 3. It is observed that the core¯ow in the duct remains towards the convex walls up to the outlet plane with lower magnitudes in the centre of plane. Cross-velocity magnitudes are found to be less than 10 per cent of the longitudinal velocity at the outlet plane. Pressure recovery is found to decrease with the increase in the angle-of-turn for both area ratios.

Effect of corner rounding on the performance of the double offset Y-shaped aircraft intake duct

“…The geometry of the intake duct consists of two limbs, each being a double offset Sduct. Both limbs have a horizontal offset of 22.5 • /22.5 • as suggested by Bharani et al [11] and a vertical offset of 15 • /15 • as recommended by Singh et al [14]. The radii of curvature were 504 and 382 mm for vertical and horizontal offsets, respectively.…”

“…Over the last decade, computational fluid dynamics (CFD) has become a popular tool to investigate flow through complex geometries. Bharani et al [10,11] carried out a three-dimensional (3-D) incompressible flow analysis for the Y-duct having a circular inlet and found four contra-rotating vortices at the merging plane. They also established the effect of the AR, angle of turn, and inlet Reynolds number on the performance of the Y-duct.…”

Aero-Engines Intake: A Review and Case Study

“…Also, the intake sits upstream of the compressor and, while the inlet does not work on the flow, inlet performance has a strong influence on engine net thrust, [NASA Glenn Research Centre]. Intake feeds air at the compressor face at a Mach number in the range 0.3 to 0.5 with minimum turbulence [4].…”

CFD analysis of performance characteristics of Y-shaped diffuser with combined horizontal and vertical offsets

“…Sudhakar and Ananthkrishnan [14] explained the jump phenomenon due to the transition of symmetric to asymmetric operation in the Yshaped diffuser in supersonic flight. Chandramoulli [4], Patel [12] and Bharani et al [2,3] have analyzed the performance of divided intake ducts using CFD analysis by taking different geometric and flow parameters.…”