Zobrazeno 1 - 10 of 11 pro vyhledávání: '"Ajmal Khan Mohamed"'
1
1‐kHz hybrid femtosecond/picosecond coherent anti‐Stokes Raman scattering thermometry of turbulent combustion in a representative aeronautical test rig
Autor: Philippe Nicolas, D. Gaffié, Elodie Lin, Ajmal Khan Mohamed, Pascal Cherubini, R. Santagata, Florestan Guichard, Jean Pierre Faleni, M. Scherman, Brigitte Attal-Trétout, Alexandre Bresson, Axel Vincent-Randonnier, Joanna Barros
Publikováno v: Journal of Raman Spectroscopy
Journal of Raman Spectroscopy, 2021, Special Issue: ECONOS/ECW 2020 Special Issue in memoriam of Marcus Motzkus, 52 (9), pp.1643-1650. ⟨10.1002/jrs.6106⟩
Journal of Raman Spectroscopy, Wiley, 2021, Special Issue: ECONOS/ECW 2020 Special Issue in memoriam of Marcus Motzkus, 52 (9), pp.1643-1650. ⟨10.1002/jrs.6106⟩
International audience; The study of complex reactive flows met in aeronautical engines is an experimental challenge that requires the development of noninvasive and precise measurement techniques. Coherent anti-Stokes Raman scattering (CARS) is a st
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b65ff38e8ddb0a969ee3e7416bab86f
https://doi.org/10.1002/jrs.6106
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2
Laser-induced incandescence and fluorescence for in-situ characterization of soot particles and precursors in semi-technical aeronautic combustors
Autor: Jean-Pierre Dufitumukiza, Cornélia Irimiea, Klaus Peter Geigle, Zhiyao Yin, Axel Vincent, Nicolas Fdida, Rafael Barrellon-Vernay, Arnaud Ristori, Pascal Cherubini, David Carru, Daniel Gaffié, Xavier Mercier, Ajmal Khan Mohamed
Publikováno v: Journée François Lacas 2021-Journée des Doctorants en Combustion
Journée François Lacas 2021-Journée des Doctorants en Combustion, Jan 2021, Virtuel, France
HAL
National audience; Physical and chemical properties of soot emitted from airplanes are still poorly known due to the difficult access at the core of these systems, as well as the stringent conditions into or at the exhaust of the engines. It is chall
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::427bc0300580cd34ddee3023aae1e8d5
https://hal.science/hal-03130511
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3
kHz Rate fs/ps-CARS Thermometry in a Representative Aeronautical Combustor
Autor: Ajmal Khan Mohamed, Florestan Guichard, Elodie Lin, Joanna Barros, Axel Vincent, Alexandre Bresson, M. Scherman, R. Santagata, Brigitte Tretout, Pascal Cherubini
Publikováno v: LACSEA 2020
LACSEA 2020, Jun 2020, VANCOUVER, Canada
International audience; Hybrid fs/ps CARS thermometry has been performed in an aeronautical combustor during turbulent CH4/air combustion (3.5 bar). Single shot N2 CARS spectra have been recorded at 1 kHz, allowing statistical and frequency ([0.1-500
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d38df0b85847781be28f873c9291673e
https://hal.archives-ouvertes.fr/hal-02908455
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4
IPDA LIDAR measurements on atmospheric CO2 and H2O using dual comb spectroscopy
Autor: Philippe-Jean Hébert, Ajmal Khan Mohamed, Jérémy Oudin
Publikováno v: International Conference on Space Optics — ICSO 2018.
We are developing an Integrated Path Differential Absorption (IPDA) LIDAR based on dual comb spectroscopy and recently achieved measurements of 𝐶𝑂2and 𝐻2𝑂 concentrations over 280 meters in the atmosphere. High repetition rate (100 MHz) fe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f82199f7b7a7374d9b057f5c34099ad6
https://doi.org/10.1117/12.2536014
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5
High-speed off-axis Cavity Ring-Down Spectroscopy with a re-entrant configuration for spectral resolution enhancement
Autor: Daniele Romanini, Jérémie Courtois, Ajmal Khan Mohamed
Publikováno v: Optics Express
Optics Express, Optical Society of America-OSA Publishing, 2010, 18, pp.4845. ⟨10.1364/OE.18.004845⟩
Monitoring of changing samples by Cavity Ring-Down Spectroscopy (CRDS) is possible using fast frequency scans of the laser and/or the cavity resonance. Mode-matched cavity excitation improves performance of fast CRDS but data-points result separated
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbebb88818aabead264ba014834b85d0
https://hal.archives-ouvertes.fr/hal-00996459
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6
Automotive exhaust gas analysis by infrared tunable diode laser absorption spectroscopy
Autor: Daniel Henry, W. Jones, Yolande Louvet, Ajmal Khan Mohamed, Eric de Borniol, Bernard Rosier
Publikováno v: SPIE Proceedings.
Engine management optimization and waste exhaust-gas control require engine transients measurements. The infrared tunable diode laser absorption spectroscopy method can measure absolute molecule concentrations, gas temperature and pressure at high ra
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::71ccba338d2db5b4e0e52d1499e84d55
https://doi.org/10.1117/12.274775
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7
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8
Utilisation de lasers femtoseconde peigne de fréquences pour des applications de détection simultanée multi-espèces de gaz à distance
Autor: Oudin, Jérémy
Publikováno v: Optique [physics.optics]. Université Paris-Saclay, 2020. Français. ⟨NNT : 2020UPASS055⟩
Nowadays, the characterization of greenhouse gases (such as CO₂, CH₄, NOₓ) on a global scale is a major issue. Identifying the sources and sinks of these various chemical species using high precision instruments is today the subject of studies.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2592::baa534571fc7b250c04602ece7d35ec2
https://tel.archives-ouvertes.fr/tel-03098521/document
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9
Utilization of femtoseconde frequency comb laser for simultaneous multi-species gaz remote detection applications
Autor: Oudin, Jérémy
Publikováno v: Optique [physics.optics]. Université Paris-Saclay, 2020. Français. ⟨NNT : 2020UPASS055⟩
Nowadays, the characterization of greenhouse gases (such as CO₂, CH₄, NOₓ) on a global scale is a major issue. Identifying the sources and sinks of these various chemical species using high precision instruments is today the subject of studies.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od_______212::baa534571fc7b250c04602ece7d35ec2
https://tel.archives-ouvertes.fr/tel-03098521/document
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10
Cartographie d’espèces chimiques en combustion par tomographie et spectroscopie d’absorption multifaisceaux
Autor: Corbas, Vincent
Publikováno v: Optique [physics.optics]. Université Paris Saclay (COmUE), 2019. Français. ⟨NNT : 2019SACLS491⟩
Chemical species densities like H₂O, CO₂, CO, K, HCl and thermodynamic data like pressure and temperature are keys parameters to understand combustion. Measurements of these parameters are great help to validate or complement numerical simulation
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______2592::3d87817d3bad640041aa0bac0131e5f8
https://tel.archives-ouvertes.fr/tel-02413238/file/82126_CORBAS_2019_archivage.pdf
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