Fatigue Analysis of Pure Waterjet Nozzle-A CFD and FEA Approach

Abstract:

Article Preview

The utilization of pure waterjet for Incremental Sheet Metal Forming (ISMF) is growing. However, the fatigue of pure waterjet nozzle is not fully clear. In the current study, based on the computational fluid dynamics (CFD) and finite element analysis (FEA), the fatigue failure of pure waterjet nozzle was simulated and analyzed. The influence of uneven equivalent stress distribution and generation of cavitation on nozzle fatigue failure was discussed. The results obtained from two simulations (velocity, pressure) show a good agreement with the theoretical predictions, which indicates that the approach based on CFD and FEA is absolutely feasible. Due to the uneven equivalent stress distribution, there is the first failure point inside the nozzle, which reduces the whole life of the nozzle. The unreasonable nozzle structure is one of main causes of cavitation generation; cavitation damage is reduced by optimizing the structure to improve the overall life of the nozzle.

Info:

Periodical:

Advanced Materials Research (Volumes 328-330)

Edited by:

Liangchi Zhang, Chunliang Zhang and Zichen Chen

Pages:

1359-1364

Citation:

Q. C. Li et al., "Fatigue Analysis of Pure Waterjet Nozzle-A CFD and FEA Approach", Advanced Materials Research, Vols. 328-330, pp. 1359-1364, 2011

Online since:

September 2011

Export:

Price:

$41.00

[1] S. X Xue. High Pressure Waterjet Technology and its Application (China Machine press, China 1998)(In Chinese).

[2] Osman Asi. Failure of a diesel engine injector nozzle by cavitation damage, Engineering Failure Analysis 13 (2006) 1126–1133.

DOI: https://doi.org/10.1016/j.engfailanal.2005.07.021

[3] C. Yi, G. S Li and D. G Zhang. Journal of Experiments in Fluid Mechanics, Vol. 19 (2005) No. 1, p.52 (In Chinese).

[4] E. Weiß and M. Rauth. FEM-integrated concept for the detailed proof of fatigue strength of nozzle-to-vessel connections, International Journal of Pressure Vessels and Piping 77 (2000) 215–225.

DOI: https://doi.org/10.1016/s0308-0161(00)00009-0

[5] J. T Yuan, G. Y Ouyang and Z. Liu. Diesel Engine, Vol. 27 (2005) No. 2, p.21 (In Chinese).

[6] J. T Yuan, G. Y Ouyang and Z. Liu. Chinese Internal Combustion Engine Engineering, Vol. 26 (2005) No. 4, p.32 (In Chinese).

[7] Ashok K. Singhal, Mahesh M. Athavale, H. Y Li and Y. Jiang. Mathematical Basis and Validation of the Full Cavitation Model, Journal of Fluids Engineering, September 2002, Vol. 124 /1.

DOI: https://doi.org/10.1115/1.1486223

[8] J. Zhang, Q. Du and Y. X Yang. Transactions of Tianjin University, Vol. 16 (2010) No. 1, p.33.

[9] Z. X He and D. T Li. Trans actions of CSICE, Vol. 22 (2004) No. 5, p.433 (In Chinese).

[10] X.B. Zhang, L.M. Qiu, H. Qi , X.J. Zhang and Z.H. Gan. Modeling liquid hydrogen cavitating flow with the full cavitation model, International Journal of Hydrogen Energy 33(2008)7197-7206.

DOI: https://doi.org/10.1016/j.ijhydene.2008.08.068

[11] Z. F Li. Engineering Mechanics, Vol. 24 (2007) No. 3, p.185 (In Chinese).