Performance Improvement of S-shaped Diffuser Using Momentum Imparting Technique

Gopaliya, Manoj Kumar; Jain, Piyush; Kumar, Sumit; Yadav, Vipul; Singh, Sumit Kumar

doi:10.9790/1684-11312331

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…A total pressure loss coefficient for a diffuser is outlined by the amendment in total pressure through the diffuser [17]:…”

Section: Profile Equation Generation By Using Matlabmentioning

confidence: 99%

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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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“…A total pressure loss coefficient for a diffuser is outlined by the amendment in total pressure through the diffuser [17]:…”

Section: Profile Equation Generation By Using Matlabmentioning

confidence: 99%

“…Inlet Velocity (m/s). The coefficient of Total Pressure loss It is characterized by what quantity total pressure is lost a little of the mean recess dynamic pressure owing to viscous forces and turbulent intermixture.A total pressure loss coefficient for a diffuser is outlined by the amendment in total pressure through the diffuser[17]:…”

mentioning

confidence: 99%

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

Singh¹

2020

Journal of Thermal Engineering

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“…Flow separation devices; depending on the type of flow control method, can be devised as active or passive. For example, submerged vortex generators (VGs) (wheeler doublet and wish-bone types), span-wise cylinders and large eddy breakup are passive devices, whereas vortex generators jet (VGJs) and either injection of the higher energy fluid or removal of lower energy fluid to energize the boundary layer from the inner wall are categorized into active methods [78][79][80][81].…”

Section: Flow Controlling Devicesmentioning

confidence: 99%

Review on the aerodynamics of intermediate compressor duct

Sharma¹,

Baloni²

2020

JMES

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In a turbofan engine, the air is brought from the low to the high-pressure compressor through an intermediate compressor duct. Weight and design space limitations impel to its design as an S-shaped. Despite it, the intermediate duct has to guide the flow carefully to the high-pressure compressor without disturbances and flow separations hence, flow analysis within the duct has been attractive to the researchers ever since its inception. Consequently, a number of researchers and experimentalists from the aerospace industry could not keep themselves away from this research. Further demand for increasing by-pass ratio will change the shape and weight of the duct that uplift encourages them to continue research in this field. Innumerable studies related to S-shaped duct have proven that its performance depends on many factors like curvature, upstream compressor’s vortices, swirl, insertion of struts, geometrical aspects, Mach number and many more. The application of flow control devices, wall shape optimization techniques, and integrated concepts lead a better system performance and shorten the duct length. This review paper is an endeavor to encapsulate all the above aspects and finally, it can be concluded that the intermediate duct is a key component to keep the overall weight and specific fuel consumption low. The shape and curvature of the duct significantly affect the pressure distortion. The wall static pressure distribution along the inner wall significantly higher than that of the outer wall. Duct pressure loss enhances with the aggressive design of duct, incursion of struts, thick inlet boundary layer and higher swirl at the inlet. Thus, one should focus on research areas for better aerodynamic effects of the above parameters which give duct design with optimum pressure loss and non-uniformity within the duct.

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“…The effect of momentum imparting on different performance characteristics of S-shaped diffuser has been studied by Gopaliya et al [28]. They concluded that: momentum imparting increases the exit static pressure coefficient of the S-shaped diffusers and the non-uniformity at diffuser exit decreases by placing a rotating cylinder across the S-diffuser width.…”

Section: Sinha and Majumdarmentioning

confidence: 99%

Experimental and Numerical Studies on Water Flow Through Rectangular Cross-Sectional Area S-Shaped Diffusers

Ibrahim

El‐Askary

Sakr

et al. 2015

ERJ. Engineering Research Journal

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The paper presents comprehensive experimental and numerical studies on water flow through rectangular S-shaped diffusers. The experimental setup was designed and constructed to perform the measurements which have been carried out on twelve models of S-shaped diffusers. The measurements of pressure distributions along the outer and inner walls of the S-shaped diffuser were performed for different parameters including area ratios, curvature ratios, inflow Reynolds numbers, turning angles (45 • /45 • , 60 • /60 • , 90 • /90 •), and flow paths (45 • /45 • , 60 • /30 • , 30 • /60 •). The energy-loss coefficients for each model are based on detailed measurements of the wall pressure distributions along walls of the S-shaped-diffuser models including long upstream and downstream tangents. The energy-loss coefficient data were plotted as a function of Reynolds number for the tested models at different geometrical parameters. The experimental data for different S-diffuser configurations have been used for assessing credibility of the numerical code using different turbulence models. High performances of computations with turbulence closure provided by

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Performance Improvement of S-shaped Diffuser Using Momentum Imparting Technique

Abstract: This paper presents the improvement in performance of S-shaped diffuser with rectangular inlet having aspect ratio 2 & rectangular outlet having area ratio

Cited by 6 publications

References 10 publications

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

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

Review on the aerodynamics of intermediate compressor duct

Experimental and Numerical Studies on Water Flow Through Rectangular Cross-Sectional Area S-Shaped Diffusers

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