Experimental Approach to Optimize Catalyst Flow Uniformity

Breuer, M.; Schernus, Christof; Böwing, Robert; Kuphal, André; Lieske, Stefan

doi:10.4271/2000-01-0865

Cited by 13 publications

(4 citation statements)

References 2 publications

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“…Many more researchers have performed velocity distribution measurements on steady flow through close-coupled catalyst manifolds (e.g. Breuer et al (2000), Voeltz et al (1999), Nagel and Diringer (2000)). Most of these studies are aimed at maximizing the flow uniformity, while minimizing the pressure drop, often through parametric studies of diffuser and runner geometry or mechanical flow dispersers.…”

Section: Pulsating Flow In Close-coupled Catalyst Manifoldsmentioning

confidence: 99%

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Study of pulsating flow in close-coupled catalyst manifolds using phase-locked hot-wire anemometry

Persoons

Bulck

Fausto³

2004

Experiments in Fluids

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Phase-locked sampling has been applied to hot-wire anemometry in order to investigate the pulsating flow inside two types of automotive exhaust manifolds fitted with a close-coupled catalyst. An isothermal dynamic flow bench has been used to compare the catalyst velocity distribution in steady operation to crank angle resolved velocity distributions measured in pulsating flow. The latter were obtained using phase-locked averaging. A rotating valve and a cylinder head have been used to generate the pulsating flow. Experimental results have proven the addition principle, i.e. the time-averaged velocity distribution in pulsating flow is proportional to a specific linear combination of velocity distributions, resulting from steady flow through each runner.

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Section: Pulsating Flow In Close-coupled Catalyst Manifoldsmentioning

confidence: 99%

“… For comparison, Arias-Garcia, et al (2001) andBenjamin, et al (2001) use a measurement grid with average cell cross-sectional area of 6.25 mm 2 6. Velocity autocorrelation measurement at 30 kHz in steady flow (u m = 12.4 m/s) downstream of the catalyst.…”

mentioning

confidence: 99%

Study of pulsating flow in close-coupled catalyst manifolds using phase-locked hot-wire anemometry

Persoons

Bulck

Fausto³

2004

Experiments in Fluids

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“…There have been numerous attempts reported in the literature to modify the catalytic converter to improve flow uniformity . Typically these involve complicated modifications.…”

Section: Introductionmentioning

confidence: 99%

“…[2,4,5] Typically these involve complicated modifications. In this paper we report on a relatively simple modification to the standard This article is dedicated to Garry Rempel's symposium at the 2014 CSChE Conference in Niagara Falls catalytic converter that is designed to keep the central portion of the catalytic converter at a higher temperature during cold start than would otherwise be achieved.…”

Section: Introductionmentioning

confidence: 99%

Exhaust emissions and fuel economy improvements through thermal performance control in a novel three‐way catalytic converter

et al. 2016

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This paper reports an investigation into the performance of a multi-chamber catalytic converter (MCCC). The MCCC design uses internal insulation layers within a standard automotive catalytic converter to control the radial propagation of thermal energy. By retaining more energy within the monolith core, the emissions are reduced over the drive cycle, allowing for a reduction of precious metals use and a smaller catalytic converter. An additional benefit is a reduction in back pressure as a result of suppressing turbulence within the converter, which translates into an improvement in fuel economy of up to 15 %.

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Investigation of the specific mass flow rate distribution in pipes supplied with a pulsating flow

Olczyk

2009

International Journal of Heat and Fluid Flow

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Experimental Approach to Optimize Catalyst Flow Uniformity

Cited by 13 publications

References 2 publications

Study of pulsating flow in close-coupled catalyst manifolds using phase-locked hot-wire anemometry

Study of pulsating flow in close-coupled catalyst manifolds using phase-locked hot-wire anemometry

Exhaust emissions and fuel economy improvements through thermal performance control in a novel three‐way catalytic converter

Investigation of the specific mass flow rate distribution in pipes supplied with a pulsating flow

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