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Slot nozzles

For air flow impinging normally to the surface from slots, nozzles, or perforated plates, the heat-transfer coefficient can be obtained from the data of Friedman and Mueller (Proceedings of the General Discussion on Heat Transfer, Institution of Mechanical Engineers, London, and American Society of Mechanical Engineers, New York, 1951, pp. 138-142). These investigators give... [Pg.1191]

Filtrate is collected in the underdrain system, which may be as simple as a network of perforated pipes covered by graded gravel or a complex structure with slotted nozzles or conduits that will retain the finest sand media while maintaining high flow rates. This latter design allows the use of both air and liquid for the backwashing and cleaning operations. [Pg.1720]

As stated above, the development of the LIGA process began at the Research Center in Karlsruhe (FZK), Germany, in the 70s as a rather inexpensive method of producing very small slotted nozzles of any lateral shape for uranium-isotope separation by the nozzle process. Its usage is now wide spread globally as well as to a much... [Pg.373]

The experimental database for single round and slot nozzles as well as arrays of round and slot nozzles has been assessed by Martin [82], He has recommended the following empirical correlation for the average Nusselt (Sherwood) number for a single round nozzle ... [Pg.1423]

Slot nozzles are convenient and easy to fabricate for smaller width dryers (1-2 m). For larger widths and for dryers employing elevated temperature jets, it is difficult to maintain a uniform jet width without developing excessive thermal stresses. The fabrication costs are high and are not justifiable. Most large-scale units (e.g., Yankee dryer for tissue) therefore use perforated plates to generate arrays of jets. They are easier and cheaper to fabricate. [Pg.374]

Since single slot or round jets are of no practical interest, correlation for this case will not be listed here. Only arrays of round and slot nozzles will be considered. Martin [9] has recommended the following correlations for these two configurations in the Heat Exchanger Design Handbook. Appropriate caution must be exercised by the user to account for various extraneous effects already noted and those discussed in subsequent chapters. [Pg.375]

Figure 16.2 shows the spatial arrangement of round and slot nozzles in arrays and the averaging area appropriate to each. Let /is the nozzle exit area/area of square or hexagon attached to it. The following table defines /for the triangular or square pitch round nozzles and parallel slot arrays ... [Pg.375]

ARN is the array of round nozzles, triangular pitch ARN is the array of round nozzles, square pitch ASN is the array of slot nozzles L is the spacing between nozzles. [Pg.375]

Korger, M. and Krizek, F. 1966. Mass-transfer coefficients in impingement flow from slotted nozzles, Int. J. Heat Mass Transfer, 9 345-353. [Pg.760]

Figure 7.3.4. Geometry of slot nozzles for the Martin s correlation [After reference 37]. Figure 7.3.4. Geometry of slot nozzles for the Martin s correlation [After reference 37].
Solid-cone nozzle Flat-spray nozzle Slot nozzle Perforated die (sprinkler)... [Pg.226]

Korger and Krizek [80] present detailed results on the variation of local mass transfer coefficients on surfaces impinged with jets from slotted nozzles at different pitches and clearances. Their findings... [Pg.790]


See other pages where Slot nozzles is mentioned: [Pg.336]    [Pg.336]    [Pg.184]    [Pg.313]    [Pg.251]    [Pg.1424]    [Pg.1424]    [Pg.1424]    [Pg.199]    [Pg.375]    [Pg.375]    [Pg.376]    [Pg.754]    [Pg.920]    [Pg.920]    [Pg.393]    [Pg.414]    [Pg.537]    [Pg.547]    [Pg.393]    [Pg.414]    [Pg.408]    [Pg.409]    [Pg.409]    [Pg.409]   
See also in sourсe #XX -- [ Pg.150 , Pg.191 ]




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