Flow visualization and particle dispersion measurements inside an ambulance rear saloon while stationary and in motion

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dc.contributor.authorLawson, Nicholas J.
dc.contributor.authorBlackburn, Kim
dc.contributor.authorSherwood, Glenn
dc.contributor.authorBrighton, James
dc.contributor.authorAtkinson, Helen V.
dc.date.accessioned2022-04-28T10:52:42Z
dc.date.available2022-04-28T10:52:42Z
dc.date.issued2022-04-07
dc.description.abstractThe following paper presents flow field and particle dispersion data from a UK National Health Service (NHS) ambulance, under static and dynamic driving conditions and when using different ventilation modes. Data was recorded using laser sheet flow visualisation, particle image velocimetry and hot wire anemometry, from a common plane positioned about the patient centreline. Results indicated a significant influence of the ceiling fan ventilation system on gross flow field behaviour, with the ventilation fan on extract or intake mode. With either ventilation mode, flow velocities in the patient region were found to double from a quiescent condition, to around 50mm/s – 100mm/s. Particle dispersion data also showed dispersion decay rates over five times faster when using the ceiling fan extraction system. All these results were consistent when the vehicle was stationary or driving at a constant speed of 60mph. However, with the vehicle under dynamic driving conditions, such as acceleration or braking, the regular flow patterns were substantially disrupted, with bulk movement of the flow in the direction of the acceleration or braking action. Under these dynamic conditions, the magnitude of the net velocity change on the fluid exceeded any flow generated from the ceiling ventilation system.en_UK
dc.identifier.citationLawson NJ, Blackburn K, Sherwood G, et al., (2022) Flow visualization and particle dispersion measurements inside an ambulance rear saloon while stationary and in motion, SAE International Journal of Commercial Vehicles, Volume 15, Issue 4, April 2022, Article number 23en_UK
dc.identifier.eissn1946-3928
dc.identifier.issn1946-391X
dc.identifier.urihttps://doi.org/10.4271/02-15-04-0023
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/17829
dc.language.isoenen_UK
dc.publisherSAE Internationalen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectflow visualisationen_UK
dc.subjectparticle image velocimetryen_UK
dc.subjectparticle sizingen_UK
dc.subjectin-vehicle flowsen_UK
dc.titleFlow visualization and particle dispersion measurements inside an ambulance rear saloon while stationary and in motionen_UK
dc.typeArticleen_UK

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