Analysis of performance characteristics of S-shaped diffuser with offset

Gopaliya, Manoj Kumar; Kumar, Mahesh; Kumar, Shailendra; Gopaliya, Shiv Manjaree

doi:10.1016/j.ast.2006.11.003

Cited by 32 publications

(23 citation statements)

References 6 publications

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“…The model and boundary conditions used are validated with the experimental results of this S-shaped diffuser[7,1] for three Reynolds numbers which are in good agreement.…”

mentioning

confidence: 77%

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

Gopaliya¹,

Chaudhary²

2010

Aerospace Science and Technology

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“…The model and boundary conditions used are validated with the experimental results of this S-shaped diffuser[7,1] for three Reynolds numbers which are in good agreement.…”

mentioning

confidence: 77%

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

Gopaliya¹,

Chaudhary²

2010

Aerospace Science and Technology

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“…The s-duct aerodynamics and the development of flow non-uniformities in dependency of more or less systematically varied inflow conditions on the other hand seems to be mainly limited to incompressible studies. Gopaliya et al 13 simulated contoured inlet ducts at three different inflow velocities resulting in three different Reynolds numbers with a fixed fluid density. Ng et al 14 measured specific flow field characteristics of an intake duct at 5 m/s and 15 m/s inflow velocity also resulting in two different Reynolds numbers and Taylor et al 15 at one Reynolds number characterising laminar and one turbulent flow in a water-tunnel s-duct.…”

Section: Introductionmentioning

confidence: 99%

CFD Investigations on the Influence of varying Inflow Conditions on the Aerodynamics in an S-Shaped Inlet Duct

Brehm¹,

Kächele²,

Niehuis³

2014

50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference

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M odern tactical aircraft designs and future civil transportation concepts often feature highly contoured engine intake geometries. This leads to complex aerodynamic phenomena within the intakes which can cause substantial distortions of the flow delivered to the compressor. This paper presents a CFD-study of the influence of varying inflow conditions represented by different Mach and Reynolds numbers at the duct inlet onto the flow field in a generic s-shaped intake geometry. The CFD-setup is first validated against experimental data provided by Wellborn et al. 1 and the suitability of different turbulence models has been investigated. Based on the validated setup, a script-based procedure has been developed to perform RANSsimulations of the flow inside the generic s-duct with different inlet conditions fully automated with the commercial CFD-code ANSYS CFX. The inlet conditions have been varied according to different aircraft operation points within the range of a generic flight envelope typical for subsonic aircraft operation. The number of the conducted simulations allows not only an overall prospective view how total pressure or swirl distortion parameters change within the envelope under consideration here. It furthermore gives the opportunity to dedicately investigate the decoupled effects of varying Mach and Reynolds numbers on the aerodynamics within the duct and the developing distortions. Thereby both the distortion intensity as well as their spatial characteristics are considered by using different distortion description parameters.

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“…Manoj K. Gopaliyaet.al. [16] have taken the impact of Offset on the S-size diffuser of 90°/90° turn with a rectangular inlet (aspect ratio 2) and half circle outlet with the regional ratio. In addition, the effect of the Reynolds number has been investigated by the author.…”

Section: Introductionmentioning

confidence: 99%

Flow Performance Comparison Along the Centerline in Straight and S-Shaped Diffuser

Singh¹

2020

Journal of Thermal Engineering

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In this paper of the S-shaped diffuser with area ratio (AR) 1.5, an experimental investigation was conducted to analyze the effect of the change in curvature of a straight-wall diffuser. During this study, a Straight diffuser was changed in to a curved diffuser at different angles as their same upper and lower limbs (60/60, 90/90). Profile equations of diffusers were generated with the help of MATLAB/Simulink v2017a software. In this work centerline length is constant for all three profiles, Centerline length that's utilized in the sector of circle and radius of curvature is calculated. S-shaped diffuser had a different unique angle with square inlet and a rectangular outlet. S-shaped diffuser CPR and CTL results compared with a straight walled diffuser with the different inlet velocity and Reynolds Number. These outcomes from this research obtained the coefficient of static pressure gain and coefficient of total pressure loss for the three profile of the diffuser (Straight, 60/60, and 90/90 S-Shaped Diffuser).

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Analysis of performance characteristics of S-shaped diffuser with offset

Cited by 32 publications

References 6 publications

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

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

CFD Investigations on the Influence of varying Inflow Conditions on the Aerodynamics in an S-Shaped Inlet Duct

Flow Performance Comparison Along the Centerline in Straight and S-Shaped Diffuser

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