Tomographic imaging of the liquid and vapour fuel distributions in a single-cylinder direct-injection gasoline engine

Terzija, N; Karagiannopoulos, Solon; Begg, Steven; Wright, Paul; Ozanyan, Krikor B.; McCann, H.

doi:10.1177/1468087414544178

Cited by 39 publications

(39 citation statements)

References 32 publications

(108 reference statements)

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“…crank angle, CA) variation of the signals from poor-quality beams, enabling their retention in the data analysis whenever possible. In other respects, the data analysis and image reconstruction applied in Terzija et al (2014) are equivalent to that in the multi-cylinder case (Wright et al, 2010).…”

Section: Case Study 1: Automotive In-cylinder Hydrocarbon Imagingmentioning

confidence: 98%

“…The system exhibited surprisingly good spatial resolution, given its small number of beams. In further work to study in-cylinder HC fuel distribution in a gasoline direct injection engine, Terzija et al (2014) applied the optoelectronics of the above IMAGER system to a single-cylinder Ricardo Hydra research engine where a 10-mm-high section of the cylinder liner consisted of a fused silica annulus. Light was launched and received along 32 paths through the cylinder via fibres terminated at the engine using GRIN lenses, each GRINefibre interface being fixed within a finished ferrule assembly supplied by Grintech GmbH (Jena, Germany).…”

Section: Case Study 1: Automotive In-cylinder Hydrocarbon Imagingmentioning

confidence: 99%

“…In all such engine studies, robust assessment of beam data quality is critically important, and the process described in Terzija et al (2014) uses a wavelet denoising (WD) step, applied to the time-series data stream of each individual beam. Beams yielding high-quality data are not significantly affected, but WD enables robust assessment of the temporal (i.e.…”

Section: Case Study 1: Automotive In-cylinder Hydrocarbon Imagingmentioning

confidence: 99%

See 2 more Smart Citations

Chemical species tomography

McCann

Wright

Daun

2015

Industrial Tomography

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Section: Case Study 1: Automotive In-cylinder Hydrocarbon Imagingmentioning

confidence: 98%

Section: Case Study 1: Automotive In-cylinder Hydrocarbon Imagingmentioning

confidence: 99%

Section: Case Study 1: Automotive In-cylinder Hydrocarbon Imagingmentioning

confidence: 99%

See 1 more Smart Citation

Chemical species tomography

McCann

Wright

Daun

2015

Industrial Tomography

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“…parallel (58,144,161,163,167) and fan-shaped (150,164,168,169) beam arrangements, the measurement space should be sampled evenly in spatial and angular dimensions to achieve the best image reconstruction results. Subject to the limits imposed by the physical size of the collimators and detectors, regular beam arrangements are often impractical in particular applications such as a multi-cylinder engine and a gas turbine engine (31,170). To visualize the properties of any beam geometry, Terzija et al first introduced sinogram space with one linear variable, s, and one angular variable, u (162).…”

Section: Beam Optimizationmentioning

confidence: 99%

Laser absorption spectroscopy for combustion diagnosis in reactive flows: A review

Liu

2018

Applied Spectroscopy Reviews

153

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Laser absorption spectroscopy (LAS) has been rapidly developed and widely applied to combustion diagnosis in recent decades. As a costeffective tool for measuring multiple combustion parameters, LAS provides unique properties in terms of accuracy and sensitivity for understanding the reactions and kinetics in reactive flows. Line-ofsight and tomographic LAS techniques have stimulated numerous applications and been proved to be robust for in situ combustion diagnosis in uniform and non-uniform combustion fields, respectively. This review highlights the breakthroughs in the evolution of LAS techniques from the viewpoints of key principles, sensors and instrumentations developed for combustion diagnosis, with particular emphasis on a series of spatially-resolved LAS techniques with their recent applications on obtaining high-fidelity measurement results with minimal intrusion to the practical combustors. Along the way, we note some challenges and requirements for further development of the LAS-based combustion diagnosis.

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“…The CO 2 measurement system is based upon optical tomography techniques developed by McCann and coworkers [2][3][4][5][6][7][8][9] and having much in common with the X-ray computed tomography ('CT') systems used in many hospitals. The required optical transmittance measurements are made along an intersecting grid of paths defining the measurement plane.…”

Section: Introductionmentioning

confidence: 99%

Implementation of non-intrusive jet exhaust species distribution measurements within a test facility

Wright

McCormick

Kliment

et al. 2016

2016 IEEE Aerospace Conference

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Abstract-We report on the installation and commissioning of two systems for the measurement of cross-sectional distributions of pollutant species in jet exhaust, within the engine ground test facility at INTA, Madrid. These systems use optical tomography techniques to estimate the cross-sectional distributions of CO 2 and soot immediately behind the engine. The systems are designed to accommodate the largest civil aviation engines currently in service, without obstruction of the exhaust or bypass flows and with negligible effect upon the entrained flow behavior. We describe the physical construction and installation status of each system. In the case of the CO 2 system, we examine the challenges of achieving the structural rigidity necessary for adequate suppression of pointing error within 126 laser-based transmittance measurements, each utilizing a 7 m overall path length. We describe methods developed for efficient implementation of co-planarity and 4-degree-of-freedom alignment of individual paths within this beam array. We also present laboratory performance data for three alternative optical designs that differ in their approach to the management of pointing error and turbulence-induced beam wander and spread. The FLITES soot monitoring capability is based on laser induced incandescence (LII) and uses a short-pulse fiber laser and two CCD cameras, in an autoprojection arrangement. We describe the measurement geometry currently being implemented in the test cell and discuss optical design issues, including once again the effect of the plume itself.

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Tomographic imaging of the liquid and vapour fuel distributions in a single-cylinder direct-injection gasoline engine

Abstract: This paper reports the application of optical tomography and Chemical Species Tomography (CST) to the characterisation of the in-cylinder

Cited by 39 publications

References 32 publications

Chemical species tomography

Chemical species tomography

Laser absorption spectroscopy for combustion diagnosis in reactive flows: A review

Implementation of non-intrusive jet exhaust species distribution measurements within a test facility

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