... of the waterjet impinging upon the workpiece, rather than the net energy. The net energy transferred to the workpiece is a function of four key process parameters, namely, (i) orifice diameter, (ii) orifice geometry, (iii) supply pressure, and (iv) traverse rate. The energy density also incorporates jet spreading...

...Alexey Velikorodny; Graham Duck; Peter Oshkai Digital particle image velocimetry was applied to investigate turbulent flow of air between a flexible wall and a rigid surface containing a backward-facing step (BFS). The inflow condition corresponded to a Coanda jet issuing from a nozzle...

...Seok-Ki Choi; Seong-O Kim A computational study for an evaluation of the current turbulence models for the prediction of a thermal striping in a triple jet is performed. The tested turbulence models are the two-layer model, the shear stress transport model, and the elliptic relaxation model...

... August 2003 01 November 2003 18 08 2004 internal stresses finite element analysis drops water jets aluminium alloys elastoplasticity shot peening Effects of the impacting high pressure waterjets on solid targets have interested researchers for some time. This interest...

...Paul Feenstra; David S. Weaver; Zia Abdullah A wind tunnel study was carried out to investigate the fluidelastic stability of a model heat exchanger tube array subjected to a uniform cross-flow of air and a concentrated jet flow of air directed down a tube lane. The latter experiments were intended...

...Mohamed Hashish, Fellow ASME; Paul L. Miller This paper presents a study on using high-pressure ammonia and abrasive ammonia jets for cutting and washout of chemical weapons. The work focused on chemical rocket M55 simulants. A test chamber was built to cut M60 training and M61 practice rockets...

... must be developed and optimized for working at these high pressures. In previous work 2 , very small jets were used and were shown to achieve a great enhancement in power efficiency. The cutting of thin (1.6-mm) aluminum using a 0.025-mm-dia orifice resulted in significant improvements in cutting...

.... The plastic deformation in waterjet-peened test specimens caused fatigue cracks to initiate in the interior of test specimens. The degree of fatigue life improvement by waterjet peening found to be dependent on peening conditions, i.e., jet pressure, standoff distance, nozzle type, jet velocity, and peening...

... internal stresses jets cutting The development of high-performance materials, such as composites and advanced ceramics, presents a variety of manufacturing challenges. Many of these materials cannot be effectively or economically machined by conventional methods, and therefore require methods...