By solving the three-dimensional incompressible Reynolds-averaged Navier-Stokes equations, numerical
simulations of the viscous flow within a flush type intake duct of a waterjet under different motion conditions are
carried out. Therein, the effects of the steering and reversing unit as well as the impeller shaft on the flow
field are taken into account. The numerical results show that the static pressure under backward conditions
with the reversing jet flow is the lowest, and the cavitations are most likely to occur within the intake duct.
The flow field under forward conditions is less uniform because of the shaft, while the velocity uniformity under
backward conditions is improved. The shaft rotation causes an asymmetric secondary flow above the shaft under
all conditions. The pressure contours under backward conditions with the reversing jet flow are sensitive to the
presence of the shaft. This study can provide some references for the design optimization of waterjet propulsion
system.
XU Huilia (许慧丽), ZOU Zaojiana,b∗ (邹早建)
. Numerical Simulation of the Flow in a Waterjet Intake Under
Different Motion Conditions[J]. Journal of Shanghai Jiaotong University(Science), 2022
, 27(3)
: 356
-364
.
DOI: 10.1007/s12204-021-2321-5
[1] CARLTON J S. Marine propellers and propulsion [M]. 3rd ed. Oxford, UK: Elsevier Ltd., 2012.
[2] VERBEEK R, BULTEN N. Recent development in waterjet design [C]//Proceedings of International Conference on Waterjet Propulsion II. A m s t e r d a m , t h e Netherlands: RINA, 1998.
[3] DING J M, W ANG Y S. Research on flow loss of inlet duct of marine waterjets [J]. Journal of Shanghai Jiao Tong University (Science), 2010, 15(2): 158-162.
[4] ITTC. The specialist committee on validation of waterjet test procedures: Final report and recommendations to the 23rd ITTC [C]//Proceedings of the 23rd ITTC, Volume 2. Venice, Italy: ITTC, 2002: 379-407.
[5] ITTC. The specialist committee on validation of waterjet test procedures: Final report and recommendations to the 24th ITTC [C]//Proceedings of the 24th ITTC, Volume 2. Edinburgh, UK: ITTC, 2005: 471-508.
[6] VON ELLENRIEDER K. Free running tests of a waterjet propelled unmanned surface vehicle [J]. Journal of Marine Engineering & Technology, 2013, 12(1): 311.
[7] BULTEN N. A breakthrough in waterjet propulsion systems [C]//Proceedings of the International Maritime Defence Exhibition and Conference. Doha, Qatar: DIMDEX, 2008: 1-6.
[8] DING J M, W ANG Y S. Parametric design and application of inlet duct of marine waterjet [J]. Journal of Shanghai Jiao Tong University, 2010, 44(10): 14231428 (in Chinese).
[9] PARK W G, YUN H S, CHUN H H, et al. Numerical flow simulation of flush type intake duct of waterjet [J]. Ocean Engineering, 2005, 32(17/18): 2107-2120.
[10] BULTEN N, V AN ESCH B. Review of thrust prediction method based on momentum balance for ducted propellers and waterjets [C]//Fluids Engineering Division Summer Meeting. Houston, USA: ASME, 2005: 1621-1629.
[11] BULTEN N. Numerical analysis of a waterjet propulsion system [D]. Eindhoven, the Netherlands: Eindhoven University of Technology, 2006.
[12] ESLAMDOOST A. The hydrodynamics of waterjet/hull interaction [D]. Gothenburg, Sweden: Chalmers University of Technology, 2014.
[13] JUNG K H, KIM K C, YOON S Y, et al. Investigation of turbulent flows in a waterjet intake duct using stereoscopic PIV measurements [J]. Journal of Marine Science and Technology, 2006, 11(4): 270-278.
[14] XU H L, ZOU Z J. Numerical simulation of the viscous flow in a waterjet intake duct under backward conditions [C]//Proceedings of the 27th International Ocean and Polar Engineering Conference. San Francisco, USA: ISOPE, 2017: 1073-1078.
