Performance of Louvered Devices as Air MixersU.S. National Bureau of Standards, 1970 - 20 pages As part of a study evaluating methods for reducing thermal gradients within the cross section of an air stream, three louvered mixing devices were investigated. Each of these devices was found to be capable of reducing the cross-sectional nonuniformity of air temperature to a few percent of the entering value. |
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Results 1-4 of 4
Page 3
... fitted with vertical louvers for deflecting the air from its normal path . Louvers were designed so that FIGURE 4. A view of the louvered strip mixing device 3 Instrumentation Conditioning and control Description of mixing devices ...
... fitted with vertical louvers for deflecting the air from its normal path . Louvers were designed so that FIGURE 4. A view of the louvered strip mixing device 3 Instrumentation Conditioning and control Description of mixing devices ...
Page 5
... fitted with louvers , which deflect these streams of air in a clockwise or counter- clockwise direction . Because of counterrotation of the adjacent annular air streams , turbulence was generated at the interface of the annuli ...
... fitted with louvers , which deflect these streams of air in a clockwise or counter- clockwise direction . Because of counterrotation of the adjacent annular air streams , turbulence was generated at the interface of the annuli ...
Page 19
... fitted a metal band to form the outer edge of the mixing element . A metal strap approximately d / 6 * wide and d long was fitted into the groove in the plywood and soldered to form the circular band . Five additional grooves were cut ...
... fitted a metal band to form the outer edge of the mixing element . A metal strap approximately d / 6 * wide and d long was fitted into the groove in the plywood and soldered to form the circular band . Five additional grooves were cut ...
Page 20
... fitted with louvers which direct the air flow along the desired course . In the outer area , the louvers were set at an angle of 60 ° from the normal path of flow and caused the air to rotate around the axis of the duct in a clockwise ...
... fitted with louvers which direct the air flow along the desired course . In the outer area , the louvers were set at an angle of 60 ° from the normal path of flow and caused the air to rotate around the axis of the duct in a clockwise ...
Common terms and phrases
0.92 duct diameter 4.75 DUCT DIAMETERS air flow Air Mixers air passed AIR STREAM VELOCITY apparatus ASHRAE automatic data processing baffles blower Building Science Series Bureau of Standards cents circular band concentric louver mixing CONCENTRIC TEMPERATURE PATTERN cross section deg F Devices as Air DIAMETER DUCT FPM DIAMETERS MEAN VELOCITY direct the air DISTANCE BETWEEN MIXING downstream measuring station Duct Diam DUCT DIAMETERS MEAN duct wall elements in series evaluated FIGURE 17 flow rate held constant louver angle louver mixing device LOUVER SETTING louver-baffle mixing device louvered strip mixing MEAN AIR STREAM ment metal mixing effectiveness National Bureau normal path outer area path of flow PATTERN THREE QUADRANTS percent pitot-static tubes QUADRANT COOL QUADRANT TEMPERATURE PATTERN Resistance Thermometer shown in figure spacing between mixing standard deviation strip mixer strip mixing device tempera temperature difference TEMPERATURE PATTERN THREE test conditions THERMOCOUPLES THREE QUADRANTS WARM tion ture U.S. Government Printing velocity head
Popular passages
Page 1 - A schematic of the apparatus is shown in figure 1. Figure 2 is a photograph of the apparatus.
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