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مکانیک::
شار گرمایی، شار گرمایی، شار حرارتی
energy due to heat flux
We shall consider only the heat flux.
the heat flux vector
The heat flux q،energy due to heat flux
We shall consider only the heat flux.
the heat flux vector
The heat flux q،These conditions lead to heat fluxes to the chamber walls that can reach as high as 10 MW/m2 during the combustion period.
However, during other parts of the operating cycle, the heat flux is essentially zero.
In regions of high heat flux, thermal stresses must be kept below levels that would cause fatigue cracking (so temperatures must be less than about 400°C for cast iron and 300°C for aluminum alloys).
In steady-flow forced-convection heat-transfer problems, the heat flux q transferred to a solid surface at temperature Tw from a flowing fluid stream at temperature T is determined from the relation
, vapor is formed in the liquid), as may be the case in high heat flux areas on the coolant side in water-cooled engines, then different relationships for hc must be used.
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