This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Combustion Imaging in Engines Using Electrical Impedance Measurements
Annotation ability available
Sector:
Language:
English
Abstract
This paper describes how the image of a flame within an enclosure can be reconstructed from multiple measurements of capacitive impedance, between non-intrusive sensing electrodes distributed around the combustion zone. Measurements across the combustion zone respond to the ionisation inherent in the combustion process, which changes the permittivity and hence the capacitance measured between electrodes. For this feasibility study, experimental data is presented from a laboratory analogue of an engine combustion chamber, demonstrating flames being imaged in real time. The sensing system is modelled using 3-D finite element methods, enabling analysis of practical electrode geometries for engine combustion chambers.
Authors
- C. M. Beck
- R. He - Process Tomography Group, University of Manchester Institute of Science and Technology
- R. C. Waterfall - Process Tomography Group, University of Manchester Institute of Science and Technology
- M. S. Beck - Process Tomography Group, University of Manchester Institute of Science and Technology
Citation
Beck, C., He, R., Waterfall, R., and Beck, M., "Combustion Imaging in Engines Using Electrical Impedance Measurements," SAE Technical Paper 941991, 1994, https://doi.org/10.4271/941991.Also In
References
- Witze P.O Green R.M. “Determining the location of end-gas autoignition using ionization probes installed in the head gasket” SAE Paper No. 932645 1993
- Xie C.G. Reinecke N. Beck M.S. Mewes D. Williams R.A. “Electrical tomography techniques for process engineering applications” Process Tomography 1994 U.M.I.S.T.
- Huang S. Green R.G. Plaskowski A. Beck M.S. “A high frequency stray-immune capacitance transducer based on the charge transfer principle” IEEE Transactions on Instrumentation and Measurement 37 3 September 1988
- Huang S. Plaskowski A.B. Xie C.G. Beck M.S. “Tomographic imaging of two-component flow using capacitance sensors” J.Phys.E: Sci.Instrum. 22 1989 173 177
- Clements R.M. Smy P.R. “The variation of ionisation with air/fuel ratio for a spark ignition engine” Journal of Applied Physics 47 505 1976
- Lawton J. Weinburg F.J. Electrical aspects of combustion Ch6; Clarendon Press 1969
- Borges A.J. On the application of the high frequency resonance method in the analysis of flame structure Tenth symposium on combustion 627 The Combustion Institute 1965
- Anderson J.C. Dielectrics Chapman and Hall 1964
- Mitchner M. Kruger CH. Partially Ionized Gases John Wiley and Sons 1973
- Heywood J.B. Internal Combustion Engine Fundamentals p454 McGraw Hill 1988