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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Page 1
... designed at the National Bureau of Standards ; the third was a modification of a previous design . The three mixers ( the louvered strip , the concentric louvers , and the louvered - baffle ) required 4.75 , 3.8 , and 3.0 duct diameters ...
... designed at the National Bureau of Standards ; the third was a modification of a previous design . The three mixers ( the louvered strip , the concentric louvers , and the louvered - baffle ) required 4.75 , 3.8 , and 3.0 duct diameters ...
Page 3
... designed with the objective of obtaining a satisfactory combination of mixing effective- ness , pressure drop , and space requirements for their use . The design and construction of the three types of mixers are described in the ...
... designed with the objective of obtaining a satisfactory combination of mixing effective- ness , pressure drop , and space requirements for their use . The design and construction of the three types of mixers are described in the ...
Page
... designed to aid Government agencies in the selection , acquisition , and effective use of automatic data processing equipment ; and serves as the principal focus for the development of Federal standards for automatic data processing ...
... designed to aid Government agencies in the selection , acquisition , and effective use of automatic data processing equipment ; and serves as the principal focus for the development of Federal standards for automatic data processing ...
Common terms and phrases
0.92 duct diameter 4.75 DUCT DIAMETERS air flow Air Mixers air passed AIR STREAM VELOCITY apparatus 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 Drop Across Mixer Duct Diam DUCT DIAMETERS MEAN duct wall elements in series evaluated 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 mixing elements National Bureau normal path outer area overall distance 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 PATTERN THREE test conditions THERMOCOUPLES THREE QUADRANTS WARM tion ture 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...