A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Design and test of an inlet-nozzle device
In many applications of water jet cutting it is necessary to turn the pre-nozzle flow by 90 deg and exit it through a nozzle within a short distance. An application of this type is borehole mining of coal and uranium. A sharp flow turn preciding the nozzle leads to flow disturbances harmful to jet performance. The inlet to the nozzle must be properly designed to minimize these disturbances. This paper presents the results of a program to design and test a flow turn/nozzle device at near production flow conditions of 19 MNm(sup-2) and 23.7 litres per second (450 kW). The device is compatible with a 30.5-cm diameter borehole. Tests were also conducted for a nozzle preceded both by a straight section and by an unmodified elbow. The flow/turn nozzle device performance is found to approach the performance is found to approach the performance of the straight section/nozzle device and to be superior to the performance of the unmodified elbow/nozzle device. Design criteria for other flow conditions are presented. (Se)
Design and test of an inlet-nozzle device
In many applications of water jet cutting it is necessary to turn the pre-nozzle flow by 90 deg and exit it through a nozzle within a short distance. An application of this type is borehole mining of coal and uranium. A sharp flow turn preciding the nozzle leads to flow disturbances harmful to jet performance. The inlet to the nozzle must be properly designed to minimize these disturbances. This paper presents the results of a program to design and test a flow turn/nozzle device at near production flow conditions of 19 MNm(sup-2) and 23.7 litres per second (450 kW). The device is compatible with a 30.5-cm diameter borehole. Tests were also conducted for a nozzle preceded both by a straight section and by an unmodified elbow. The flow/turn nozzle device performance is found to approach the performance is found to approach the performance of the straight section/nozzle device and to be superior to the performance of the unmodified elbow/nozzle device. Design criteria for other flow conditions are presented. (Se)
Design and test of an inlet-nozzle device
Konstruktion und Pruefung einer Einlassduese fuer Wasserstrahl-Schneidgeraete
Lohn, P.D. (author) / Brent, D.A. (author)
1978
16 Seiten, 13 Bilder, 23 Quellen
Conference paper
English
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