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Article

Analysis of the Flow Field from Connection Cones to Monolith Reactors

1
School of Transportation Science and Engineering, Beihang University, Beijing 100083, China
2
Department of Mechanics and Maritime Sciences, Chalmers University of Technology, SE-41296 Göteborg, Sweden
*
Author to whom correspondence should be addressed.
Energies 2019, 12(3), 455; https://doi.org/10.3390/en12030455
Received: 22 January 2019 / Revised: 30 January 2019 / Accepted: 30 January 2019 / Published: 31 January 2019
(This article belongs to the Special Issue Internal Combustion Engines 2018)
The connection cones between an exhaust pipe and an exhaust after-treatment system (EATS) will affect the flow into the first monolith. In this study, a new streamlined connection cone using non-uniform rational B-splines (NURBS) is applied to optimize the flow uniformity inside two different monoliths (a gasoline particulate filter and an un-coated monolith). NURBS and conventional cones were created using 3D printing with two different cone angles. The velocities after the monolith were collected to present the uniformity of the flows under different cones and different velocities. The test results indicate that NURBS cones exhibit better performance. Furthermore, all of the pressure drops of the bench test were measured and compared with those of the conventional cones, demonstrating that the NURBS cones can reduce the pressure drop by up to 12%. The computer fluid dynamics simulations depict detailed changes in the flow before and after entering the monolith. The results show that the NURBS cone avoids the generation of a recirculating zone associated with conventional cones and creates a more uniform flow, which causes a lower pressure drop. Meanwhile, the package structure of the NURBS cone can reduce the space requirements. Finally, the implications of the flow distributions are discussed. View Full-Text
Keywords: flow uniformity; connection cone; non-uniform rational B-splines (NURBS); pressure drop flow uniformity; connection cone; non-uniform rational B-splines (NURBS); pressure drop
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MDPI and ACS Style

Mu, M.; Sjöblom, J.; Ström, H.; Li, X. Analysis of the Flow Field from Connection Cones to Monolith Reactors. Energies 2019, 12, 455. https://doi.org/10.3390/en12030455

AMA Style

Mu M, Sjöblom J, Ström H, Li X. Analysis of the Flow Field from Connection Cones to Monolith Reactors. Energies. 2019; 12(3):455. https://doi.org/10.3390/en12030455

Chicago/Turabian Style

Mu, Mingfei, Jonas Sjöblom, Henrik Ström, and Xinghu Li. 2019. "Analysis of the Flow Field from Connection Cones to Monolith Reactors" Energies 12, no. 3: 455. https://doi.org/10.3390/en12030455

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