Gouging


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Related to Gouging: back gouging, arc gouging

gouging

[′gau̇j·iŋ]
(engineering)
The removal of material by electrical, mechanical, or manual means for the formation of a groove.

compressor blade damage

compressor blade damageclick for a larger image
Various types of damages that compressor blades can sustain. Only one or two may take place simultaneously though these have been combined in this illustration.
The various types of damages to compressor blades and their appearances are as follows:
i. Bend. The blade gives the appearance of ragged edges. Smooth repair of the edges or surface in question can be carried out, but the extent of the damage that can be repaired is limited.
ii. Bow. The main source of this type of damage is a foreign object. The blade is bent at the tips and the edges.
iii. Burning. The damage is caused by overheating. The surface of the blade is discolored. If the overheating is severe, there may be some flow of material as well.
iv. Burr. A ragged or turn-out edge is indicative of this type of damage. This takes place during the grinding or cutting operation of the blade at the manufacturing stage.
v. Corrosion. Oxidants and corrosive agents, especially moisture present in the atmosphere, are the main reasons for the corrosion or pitting of the blades. Normally, regular washing is sufficient to prevent it. The blade gives a pitted appearance, and there is some breakdown of the surface of the blade. Also called pitting.
vi. Cracks. Excessive stress from shocks, overloading, or faulty processing of blades during manufacturing can cause cracks and result in their fracture.
vii. Dent. These can be caused by FOD (foreign-object damage) or strikes by dull objects like those in bird strikes. Minor dents can be repaired.
viii. Gall. This type of damage is from the severe rubbing of blades, in which a transfer of metal from one surface to another takes place.
ix. Gouging. The blade gives the appearance of displacing material from its surface, and a tearing effect is prominently visible. This type of damage is from the presence of a comparatively large cutting material or foreign body between moving parts.
x. Growth. The damage manifests itself in the form of elongation of the blades. Growth type of damage takes place because of continued and/or excessive heat and centrifugal force.
xi. Score. Deep scratches are indicative of scoring, which is caused by the presence of chips between surfaces.
xii. Scratch. Narrow and shallow scratches are caused by sand or fine foreign particles as well as by mishandling the blades.
xiii. Pitting. Pitting takes place because of atmospheric corrosion, especially seawater. The surface of the blade shows signs of pitting.
References in periodicals archive ?
For example, he states that "there are many reasons to think that price increases condemned as gouging are morally innocent at worse and, more often, create a positive and praiseworthy benefit for all concerned" (277).
Watching for price gouging, however, is a waste of everyone's time.
20) The Note will conclude by proposing recommendations for Massachusetts courts to consider when analyzing a gouging claim in the future.
Instead, price gouging laws appear more akin to laws banning the sale of horse meat for human consumption, "Blue laws" that prevent the sale of certain items on Sunday, or laws that once prohibited interracial marriage.
The IRB vowed "to send out the strongest possible message that such acts will not be tolerated," and stated publicly its determination to rid the sport of the "heinous" act of gouging.
Viadana said if there had been gouging then the player concerned deserved to be punished.
The Frenchman had been cited for gouging flanker Stephen Ferris's eyes in an ill-tempered game won 23-13 by Ulster at Ravenhill, Belfast.
Eye gouging governing body, the F-eye-ters Sanity Authority (FSA) has ordered post contest brain scans for members of both sides.
Gouging is the sneaky, sly trick of sticking fingers in an opponent's eye sockets.
Burger was banned for eight weeks on Sunday for gouging the eyes of Lions winger Luke Fitzgerald in the first minute of the second Test in Pretoria the previous day.
But the game was marred by a potential gouging incident which could rule Alan Quinlan out of the Lions Tour.
The Welsh region's team management believe they have video evidence of White gouging their players and have brought it to the attention of the citing officer after their Heineken Cup victory over the Tigers at the Liberty Stadium.