jet hole

jet hole

[′jet ‚hōl]
(engineering)
A borehole drilled by use of a directed, forceful stream of fluid or air.
References in periodicals archive ?
It's believed Sammy may have slithered through a wall cavity and a gas jet hole into the oven.
Nomenclature: A = Target plate surface area, [m.sup.2] [A.sub.h] = Hole cross-sectional area, [m.sup.2] D = Jet hole diameter, m H = Jet to target spacing, m [h.sub.av] = Averaged heat transfer coefficient, W/[m.sup.2].k k = Thermal conductivity of the target plate, W/m.K [m.sup.*] = Mass flow rate, kg/s Nu = Nusselt number [bar.Nu] = Area-averaged Nusselt number Q = Heat flow rate, Watt Re = Reynolds number S = Jet to jet spacing, m t = thickness, m T = Temperature, degree centigrade Tw = Wall temperature, degree centigrade X = Local length of the target plate, m [bar.[eta]] = Average wall cooling effectiveness [rho] = Density of the air, kg/[m.sup.3] Subscript: s = crossflow av.= average in = inner target surface j = jet out = outer target surface [infinity] = mainstream flow REFERENCES
"Effect of Jet Hole Arrays Arrangement on Impingement Heat Transfer" M.Sc.
Azad et al [11], Used line jets array (four row with each row having twelve jet holes) impinging orthogonally on pinned target surface and observed the heat transfer is increased greatly.
Then seal the siphon jet hole with another glob of putty and pour a bottle of lime remover into the overflow pipe (Photo C).
One is the row of rinse holes under the rim, and the other is the priming jet hole in the bottom of the bowl.
Finally, clean the priming jet hole at the bottom of the bowl.
Screw in the gas jets in decreasing order of gas jet holes until the rifle operates and ejects normally.
Redesigning the size, shape, and angle of trapways, the location and direction of rim and jet holes, and tank and bowl water levels have improved siphons in gravity toilets.
Another problem that occurs in spunlacing is the scaling or corroding of the jet holes. Both situations can result in misshapen holes, thereby decreasing the efficiency of the process.