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مکانیک::
مرحله انبساط
This is due primarily to the decreasing gas temperatures as the expansion stroke proceeds, and not the longer time available for burnup.83
Individual spherule didtneters are about 30 nm, so soot which mixes with air early in the expansion stroke is likely to be fully burned.
Combustion is essentially complete early in the expansion stroke.
Again this would be expected, since the combustion gases do not contact the lower parts of the cylinder wall until later in the expansion stroke when their temperature is much below the peak value.
Expansion stroke heat fluxes are underpredicted by all three correlations.
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