Study on Heat Losses during Flame Impingement in a Diesel Engine Using Phosphor Thermometry Surface Temperature Measurements

2019-01-0556

04/02/2019

Features
Event
WCX SAE World Congress Experience
Authors Abstract
Content
In-cylinder heat losses in diesel engines decrease engine efficiency significantly and account for approximately 14-19% [1, 2, 3] of the injected fuel energy. A great part of the heat losses during diesel combustion presumably arises from the flame impingement onto the piston. Therefore, the present study investigates the heat losses during flame impingement onto the piston bowl wall experimentally. The measurements were performed on a full metal heavy-duty diesel engine with a small optical access through a removed exhaust valve. The surface temperature at the impingement point of the flame was determined by evaluating a phosphor’s temperature dependent emission decay. Simultaneous cylinder pressure measurements and high-speed videos are associated to the surface temperature measurements in each cycle. Thus, surface temperature readings could be linked to specific impingement and combustion events. The results showed a sharp increase of the surface temperature during the flame impingement and an abrupt decrease as the flame disappeared.
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DOI
https://doi.org/10.4271/2019-01-0556
Pages
10
Citation
Binder, C., Matamis, A., Richter, M., and Norling, D., "Study on Heat Losses during Flame Impingement in a Diesel Engine Using Phosphor Thermometry Surface Temperature Measurements," SAE Technical Paper 2019-01-0556, 2019, https://doi.org/10.4271/2019-01-0556.
Additional Details
Publisher
Published
Apr 2, 2019
Product Code
2019-01-0556
Content Type
Technical Paper
Language
English