In the earlier posts in this chapter I have discussed the problem of getting the nozzle of a waterjet system close enough to the tool:target contact that the jet retains enough power to be effective. At the same time the jet must strike within roughly 1/10th of an inch of that contact to be effective […]
Tag Archives: range
In the earlier posts in this chapter I have discussed the problem of getting the nozzle of a waterjet system close enough to the tool:target contact that the jet retains enough power to be effective. At the same time the jet must strike within roughly 1/10th of an inch of that contact to be effective […]
01
Oct
Oct
At the end of the last post I mentioned the benefits that could occur if two jets were directed to intersect at a distance from the nozzle. Marian Mazurkiewicz did a lot of early work on this, and it was written up in an ASTM STP.* Because it has a couple of applications that include […]
29
Sep
Sep
A single waterjet, whether with or without abrasive, will cut a tapering slot as it penetrates into a target material. This is because, as the jet penetrates into the surface, the outer edges of the jet lose their energy in cutting, and the narrower central core remains capable of cutting, on a continually narrowing path, […]
In the last post I wrote about the impact of smaller jet diameters, and higher pressures, in truncating the range over which a waterjet is effective. The same is true, to an extent, when one adds abrasive to the water. Our “green tube” test has been described in earlier posts, where the distance over which […]
September 16, 2014 Source: T. Mason Hamilton, U.S. Energy Information Administration The global crude oil and refined product tanker fleet uses a classification system to standardize contract terms, establish shipping costs, and determine the ability of ships to travel into ports or through certain straits and channels. This system, known as the Average Freight Rate […]
10
Sep
Sep
The range over which a waterjet is able to cut material can widely quite significantly, depending on a wide range of factors, including abrasive content. An earlier post described the way in which students in a waterjet class were shown some of the difficulties in assessing risks arising from the use of a waterjet, and […]
August 21, 2014 Source: U.S. Energy Information Administration Brent crude oil spot prices averaged $ 107 per barrel (bbl) in July, marking the 13th consecutive month in which average Brent crude oil prices were between $ 107/bbl and $ 112/bbl (see graph above). Although supply growth from non-OPEC countries has outpaced world consumption in the […]
20
Jul
Jul
In an early section of these notes on high-pressure water and its uses, there was a review of some of the ways in which jet power could be assessed. For the most part the best way to see how changes in a system alter the way the jets cut is to run a simple cutting […]
