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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... Selection , and Use . $ 2.50 BSS8 . Interrelations Between Cement and Concrete Properties : Part 3 , Compressive Strengths of Port- land Cement Test Mortars and Steam - Cured Mortars . 55 cents BSS9 . Thermal - Shock Resistance for ...
... Selection , and Use . $ 2.50 BSS8 . Interrelations Between Cement and Concrete Properties : Part 3 , Compressive Strengths of Port- land Cement Test Mortars and Steam - Cured Mortars . 55 cents BSS9 . Thermal - Shock Resistance for ...
Page 2
... selected conditions of temperature . Immediately following the conditioning section of the apparatus , a measuring station was posi- tioned for determining the temperature pat- tern of the air prior to its entering the mixing device to ...
... selected conditions of temperature . Immediately following the conditioning section of the apparatus , a measuring station was posi- tioned for determining the temperature pat- tern of the air prior to its entering the mixing device to ...
Page 3
... selection of temperature patterns . Electrical resistance heaters posi- tioned in a circular pattern around the periphery of the duct near the duct wall were used to produce concentric temperature pat- terns . was In this study , three ...
... selection of temperature patterns . Electrical resistance heaters posi- tioned in a circular pattern around the periphery of the duct near the duct wall were used to produce concentric temperature pat- terns . was In this study , three ...
Page 7
... selected temperature patterns . fourth of the stream at a different temperature than the remaining three - fourths is shown in the center of figure 7. From the results shown by the three bar graphs in figure 7 , it is evi- dent that the ...
... selected temperature patterns . fourth of the stream at a different temperature than the remaining three - fourths is shown in the center of figure 7. From the results shown by the three bar graphs in figure 7 , it is evi- dent that the ...
Page 10
... selected temperature patterns . at various downstream locations after the air stream has passed through the mixer . From the data shown in figure 14 , it was found that a distance of 0.92 duct diameter between ele- ments provided ...
... selected temperature patterns . at various downstream locations after the air stream has passed through the mixer . From the data shown in figure 14 , it was found that a distance of 0.92 duct diameter between ele- ments provided ...
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
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Page 1 - A schematic of the apparatus is shown in figure 1. Figure 2 is a photograph of the apparatus.
Page 20 - Announcement of New Publications in Building Science Series Superintendent of Documents, US Government Printing Office, Washington, DC 20402 Dear Sir: Please add my name to the announcement list of new publications to be issued in the series : National Bureau of Standards Building Science Series. Name Company Address City State Zip Code (Notification key N-339...