Measurements of Instantaneous Heat Flux to Metal and Ceramic Surfaces in a Diesel Engine 870155
The effects of surface materials and extent of insulation on the heat transfer to the head of an open-chamber diesel were studied. A large instrumentation plug designed to incorporate plates of various materials on the gas-side surface was utilized with a special research head. Instantaneous rates of heat transfer to the plate gas-side surface were measured. Measurement results obtained with a zirconia plate and an insulated metal plate are compared to data for an uninsulated metal plate. The insulation of the metal plate increased its gas-side surface temperature over the uninsulated case by about the same amount achieved with a 6.35-mm-thick zirconia plate. The magnitude of the surface temperature swing for zirconia is not as high as expected from conduction theory, but is substantially higher than that for the uninsulated metal. Significant reductions of steady state heat fluxes were achieved with both the zirconia and the insulated metal compared to the uninsulated metal. However, peak values of surface heat fluxes for the insulated metal were found to be higher than those for the uninsulated metal. Substantial reductions in peak values of surface heat flux were achieved with zirconia over the uninsulated metal. Surface temperature levels for zirconia were not as high as possible because of limitations placed on the thermal loading by the design of the research engine head.
Citation: Huang, J. and Borman, G., "Measurements of Instantaneous Heat Flux to Metal and Ceramic Surfaces in a Diesel Engine," SAE Technical Paper 870155, 1987, https://doi.org/10.4271/870155. Download Citation
Author(s):
Jeffrey C. Huang, Gary L. Borman
Pages: 19
Event:
SAE International Congress and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
SAE 1987 Transactions: Reciprocating Engines--Spark Ignition and Diesel-V96-4, Adiabatic Engines and Systems-SP-0700
Related Topics:
Plating
Heat transfer
Insulation
Metals
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