Investigation of swirl meter performance

Heim, Douglas; Ghandhi, J. B.

doi:10.1177/0954407011404763

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…Although the transient flow can be approximated as a weighted sum of steady flow bench results at multiple valve lifts, it should be noted that even with the accurate impulse-based swirl meter of [15], the results can be affected by a 10% error bias [34]. From the present results, it appears that the were also compared with PIV measurements available for the same engine [16].…”

Section: Intake Swirl Ratiomentioning

confidence: 82%

A comprehensive modeling study of in-cylinder fluid flows in a high-swirl, light-duty optical diesel engine

2014

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The effectiveness of computational fluid dynamics modeling as a tool for researching fuel-lean, low temperature engine combustion strategies relies on its capability to capture the local fluid flow properties that affect spray dynamics, mixture preparation and ignition kinetics. In this study, a comprehensive model of an optically accessible, single-cylinder light-duty diesel engine was developed for engine combustion research. The computational model

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Section: Intake Swirl Ratiomentioning

confidence: 82%

A comprehensive modeling study of in-cylinder fluid flows in a high-swirl, light-duty optical diesel engine

2014

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“…Typically, many studies treating the in-cylinder flow while analyzing the intake manifold and around the vicinity of the intake valve were carried out under the consideration of a constant filling flow and a fixed intake valve position [23,24]. The techniques of optical diagnostics and analysis such as Laser Doppler Anemometry (LDA), magnetic resonance velocimetry (MRV) and Particle image velocimetry (PIV) achieved a remarkable progress, but always they presented an insufficiency in the description and resolution around the intake valve.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Empirical Studies of the Commercial SI Engine Performance and Its Emission Levels When Running on a CNG and Hydrogen Blend

2017

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This article is a report on a simulation based on Computational Fluid Dynamics (CFD) and an empirical investigation of in-cylinder flow characteristics, In addition, it assesses the performance and emission levels of a commercial-spark ignited engine running on a CNG and Hydrogen blend in different ratios. The main objective was to determine the optimum hydrogen ratio that would yield the best brake torque and release the least polluting gases. The in-cylinder flow velocity and turbulence aspects were investigated during the intake stroke in order to analyze the intake flow behavior. To reach this goal, a 3D CFD code was adopted. For various engine speeds were investigated for gasoline, CNG and hydrogen and CNG blend (HCNG) fueled engines via external mixtures. The variation of brake torque (BT), NO X and CO emissions. A series of tests were conducted on the engine within the speed range of 1000 to 5000 rpm. For this purpose, a commercial Hyundai Sonata S.I engine was modified to operate with a blend of CNG and Hydrogen in different ratios. The experiments attempted to determine the optimum allowable hydrogen ratio with CNG for normal engine operation. The engine performance and the emission levels were also analyzed. At the engine speed of 4200 rpm, the results revealed that beyond a ratio of 50% of the volume of hydrogen added to CNG a backfire phenomenon appeared. Below this ratio (0~40%) of the hydrogen volume, the CNG and Hydrogen blend seemed to be beneficial for the engine performance and for curtailing the emission level. However, at low engine speeds, the NO X concentration increased simultaneously with hydrogen content. In contrast, at high engine speeds, the NO X concentration decreased to its lowest level compared to that reached with gasoline as a running fuel. The concentration levels of HC, CO 2 , and CO decreased with the increase of hydrogen percentage.

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“…Full details of the steady flow testing methodology can be found in the study by Heim and Ghandhi. 27…”

Section: Steady Flow Characterizationmentioning

confidence: 99%

Size-scaling effect on the velocity field of an internal combustion engine, part I: Bulk motion

Heim

Ghandhi

2012

International Journal of Engine Research

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In-cylinder velocity measurements were acquired to study the bulk fluid motion in two geometrically scaled, two-valve, optically accessible, and single-cylinder research engines. Different port geometries (two), different port orientations (two), and both shrouded and nonshrouded intake valves were tested to vary the intake-generated flow. The engines were motored at speeds ranging from 300 to 1200 r/min for the larger engine and from 600 to 1800 r/min for the smaller engine. Prior to testing on the engines, the different head configurations were tested on a steady flow bench. Particle image velocimetry data were taken on a single plane, parallel to the piston surface, in the engines to characterize the large-scale flow phenomena. The mean location of the swirl center and the mean angular velocity were determined by fitting a solid-body profile to the flow. The results showed that the swirl center location was relatively insensitive to engine speed for both engines, but did change position throughout the cycle. The swirl center locations, scaled by the cylinder radii, were found to be in nearly the same location for the two-scaled engines in the same nominal configuration, indicating that the swirl center motion was deterministic in nature. Normalizing the best-fit solid-body angular velocity by the engine rotation rate was found to collapse the data from the multiple engine speeds nearly onto a single curve for a given engine configuration. The angular velocity was found to decrease with crank angle due to wall friction, which was higher for the small engine because of the higher surface-to-volume ratio.

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Investigation of swirl meter performance

Cited by 8 publications

References 14 publications

A comprehensive modeling study of in-cylinder fluid flows in a high-swirl, light-duty optical diesel engine

A comprehensive modeling study of in-cylinder fluid flows in a high-swirl, light-duty optical diesel engine

Simulation and Empirical Studies of the Commercial SI Engine Performance and Its Emission Levels When Running on a CNG and Hydrogen Blend

Size-scaling effect on the velocity field of an internal combustion engine, part I: Bulk motion

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