Quality Waterjet Newsletter 12/09/2008

Noise Characteristics of Abrasive Waterjets


Brenner et al* did an experimental study of the noise characteristics of abrasive waterjets in various conditions. Tests were done with a pump capable of 250 Mpa pressure and 25 l/min flow rate. Quartz sand was used as abrasive. Noise characteristic measurements were done at the operator’s position by using a German made noise gage RFT-00.023. The measurement results are summarized in the following table.



where the admissible data were from “Noise Characteristics Standards for Machines PTM 12.44.022-78) and the operation modes were as follows:


l      Mode 1: Jet in free air (100 Mpa pressure)

l      Mode 2: Jet impacted a concrete block with a standoff distance of 5 mm (100 Mpa pressure)

l      Mode 3: Jet passed through a hole of 100 mm depth in the concrete block (100 Mpa pressure)

l      Mode 4: Like Mode 2, but on a limestone block.

l      Mode 5: Nozzle was immersed in the hole of limestone blocks at the depth of 120 mm (100 Mpa pressure).

l      Mode 6: Like Mode 2, but the nozzle and the space between nozzle and the concrete block were covered with a noise absorptive case.

l      Mode 7:  Like Mode 2, but at 250 Mpa pressure.

l      Mode 8: Like Mode 6, but at 250 Mpa pressure.


*Brenner, V.A., Pushkarev, A.Y., Golovin, K.A., Chukov, A.N., & Naumov, Y.N. (2000) Measurement of noise characteristics of hydro-jet cutting tools, Proceedings of the 15th International Conference on Jetting Technology, Ronneby, Sweden, September 6-8, pp 277-281.




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