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valles36
05.10.2019 •
Engineering
Explain the importance of time in the testing of polymers
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Ответ:
The polymer testing is the type of testing that mainly focus on the characteristics and analysis of the polymer material. It basically include synthetic and the natural based polymer.
It is the type of testing that typically test the novel type of polymeric material in the solution and also the dispersion is also cover.
In the testing of the polymer, the time plays an important role as, it is very useful to collect the information at different interval of time.
The equilibrium of time is also associate with the given material which is being measured by using this type of testing.
Ответ:
The flow velocity at outlet is approximately 37.823 meters per second.
The inlet radius of the nozzle is approximately 0.258 meters.
Explanation:
A conical nozzle is a steady state device used to increase the velocity of a fluid at the expense of pressure. By First Law of Thermodynamics, we have the energy balance of the nozzle:
Energy Balance
Where:
It is recommended to use water in the form of superheated steam to avoid the appearing of corrosion issues on the nozzle. From Property Charts of water we find the missing specific enthalpies:
Inlet (Superheated steam)
Where
is the specific volume of water at inlet, in cubic meters per kilogram.
Outlet (Superheated steam)
If we know that
,
,
and
, then the flow speed at outlet is:
The flow velocity at outlet is approximately 37.823 meters per second.
The mass flow is related to the inlet radius (
), in meters, by this expression:
If we know that
,
and
, then the inlet radius is:
The inlet radius of the nozzle is approximately 0.258 meters.