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leejsmith · 07-16-2003, 01:40 AM

this will help to work out the heat tx for a given jet but i didnt know how to work out all the fields it needs.

http://www.coolingzone.com/Content/D...as/fcalc10.htm

Prandtl Number

Diameter (m) thats ones easy

Radius of the measurement area (2.5D <= r <= 7.5D) (m)

Height (2D <= H <= 12D) (m)

Kinematic viscosity (m^2/s)

Nozzle exit velocity (m/s)

Thermal conductivity (W/m.K)

if you can complete these fields it will tell you the average heat tx of the jet.

any thoughts ben ?

cathar told me the following is critical for the cascade to work.

copper between each cup needs to be a little as possible. Each jet only cools a small area.
the height of the tube above the cup base needs to be enough for the jets to form. IMO 3 * jet ID
jet orifice area should be around 26-30mm2 for all jets.

jet ID and cup ID should follow this guideline again ben can you add to this

http://www.lmnoeng.com/PipeDuct.htm

hope this helps some.

07-16-2003, 01:40 AM	#52
leejsmith Cooling Savant Join Date: Mar 2003 Location: notts uk Posts: 408	this will help to work out the heat tx for a given jet but i didnt know how to work out all the fields it needs. http://www.coolingzone.com/Content/D...as/fcalc10.htm Prandtl Number Diameter (m) thats ones easy Radius of the measurement area (2.5D <= r <= 7.5D) (m) Height (2D <= H <= 12D) (m) Kinematic viscosity (m^2/s) Nozzle exit velocity (m/s) Thermal conductivity (W/m.K) if you can complete these fields it will tell you the average heat tx of the jet. any thoughts ben ? cathar told me the following is critical for the cascade to work. copper between each cup needs to be a little as possible. Each jet only cools a small area. the height of the tube above the cup base needs to be enough for the jets to form. IMO 3 * jet ID jet orifice area should be around 26-30mm2 for all jets. jet ID and cup ID should follow this guideline again ben can you add to this http://www.lmnoeng.com/PipeDuct.htm hope this helps some.