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21 results on '"Arora, B.B."'

7. Effects of casing angle on the performance of parallel hub axial annular diffuser.

Author

Singh, Hardial and Arora, B.B.

Subjects
SWIRLING flow, FLOW separation, STATIC pressure, COMPUTATIONAL fluid dynamics, ANGLES
Abstract

In this paper, the effects of non-swirling and swirling flow on the performance of parallel hub axial annular diffuser has been investigated. The study was conducted on a fully developed swirling flow and non-swirling flow to predict the separation of the flow from the wall. Three different annular diffusers were used with casing wall angles of 3°, 6°, and 9°. Furthermore, various swirl angles (0–25°) at the inlet of diffusers have been investigated to analyze the performance across the length. It was found that parallel hub axial annular diffuser performance increases up to a certain length as the inlet swirl angle increases. However, the performance also improves as the diffuser area ratio (AR) increases. The performance is evaluated based on the static pressure recovery coefficient (Cp) and the total pressure loss coefficient (CTL). The highest possible pressure recovery is achieved by the 12° swirl angle with a casing angle of 6°. [ABSTRACT FROM AUTHOR]

Published
2023
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8. Effect of swirl flow on the performance of parallel hub axial annular diffuser

Author

Arora B.B and Hardial Singh

Subjects
Materials science, General Engineering, Reynolds number, Mechanics, Static pressure, Diffuser (thermodynamics), Physics::Fluid Dynamics, Flow separation, symbols.namesake, Axial compressor, Flow conditioning, symbols, Ligand cone angle, Casing
Abstract

In the present work, the performance characteristics of the parallel hub axial flow annular diffuser with divergent casing varying between equivalent cone angle (10°, 15°, and 20°) with area ratio 3 has been evaluated computationally as well as experimentally. The performance of three diffusers were tested at different inlet swirl angles (from 0° to 25°) for swirling and non-swirling flow. Simulations have been carried out on a fully developed flow at Reynolds number 2.5×105. The results were analyzed based on the velocity profile, static pressure recovery coefficient, and the total pressure loss coefficient. The result analysis shows that the inlet swirl flow improves the recovery of pressure and also delays the flow separation on the casing. The results show that better performance is observed in the case of parallel hub diverging casing with equivalent cone angle 10° and inlet swirl angle of 7.5° in comparison to other diffusers.

Published
2021

20. Exergy analysis of a Vapour Compression Refrigeration system with R-22, R-407C and R-410A

Author

Arora, Akhilesh, Arora, B.B., Pathak, B.D., and Sachdev, H.L.

Subjects
Cold storage -- Analysis, Engineering and manufacturing industries
Abstract

Byline: Akhilesh Arora, B.B. Arora, B.D. Pathak, H.L. Sachdev The parametric investigations of actual Vapour Compression Refrigeration (VCR) cycle in terms of Coefficient of Performance (COP), Exergy Destruction (ED) and exergetic efficiency of refrigerants R-22, R-407C and R-410A have been predicted with the help of a developed computational model. The present investigation has been carried out for evaporator and condenser temperatures in the range of -38[degrees]C to 7[degrees]C and 40[degrees]C to 60[degrees]C respectively. The results indicate that COP and exergetic efficiency for R-22 are higher in comparison to R-407C and R-410A. The optimum evaporator temperature for minimum ED ratio has been evaluated at various condenser temperatures.

Published
2007

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