A shimmering seen over a hot surface on a calm, cloudless day, caused by the unequal refraction of light by innumerable con- vective air columns of different temperatures and densities.
Related Terms |
SKIN CONDENSER
Condenser using the outer surface of the cabinet as the heat radiating medium.
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AIR COOLER
A factory-encased assembly of elements whereby the temperature of air passing through the device is reduced.
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ABRASION RESISTANCE
The ability of a material to resist surface wear.
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CUTTING WEAR
Comes about when hard surface asperities or hard particles that have embedded themselves into a soft surface and plough grooves into the opposing harder surface, e.g., a journal.
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ADHESIVE WEAR
Often referred to as galling, scuffing, scoring, or seizing. It happens when sliding surfaces contact one another, causing fragments to be pulled from one surface and to adhere to the other.
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AIR INFILTRATION
The leakage of air into a room through cracks in doors, windows, and other openings.
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CLEAN ROOM
A facility or enclosure in which air content and other conditions (such as temperature, humidity, and pressure) are controlled and maintained at a specific level by special facilities and operating processes and by trained personnel.
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JOURNAL BEARING
A sliding type of bearing having either rotating or oscillatory motion and in conjunction with which a journal operates. In a full or sleeve type journal bearing, the bearing surface is 360° in extent. In a partial bearing, the bearing surface is less than 360° in extent, i.e., 150°, 120°, etc.
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OUTDOOR AIR
Air taken from outdoors and, therefore, not previously circulated through the system.
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SPREAD
The divergence of the air stream in a horizontal or vertical plane after it leaves the outlet.
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