International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical investigation of the unsteady flow of a hybrid CRP pod propulsion system at behind-hull condition

  • Zhang, Yuxin (Shanghai Merchant Ship Design and Research Institute) ;
  • Cheng, Xuankai (Shanghai Merchant Ship Design and Research Institute) ;
  • Feng, Liang (Shandong Provincial Key Laboratory of Ocean Engineering)
  • Received : 2020.02.21
  • Accepted : 2020.10.12
  • Published : 2020.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

Flows induced by hybrid CRP pod propulsion systems (CRP-POD) are fundamentally characterized by unsteadiness. This work presents a numerical study on the unsteady flow of a CRP-POD at behind-hull condition based on CFD (Computational Fluid Dynamics). Unsteady RANS method is adopted, coupled with SST k-u turbulence model and sliding mesh method. The propeller thrusts and torques obtained by CFD is validated by model tests and acceptable agreements are obtained. The time histories of shingle-blade loads and pressures near the hull surface are recorded for the analysis of unsteady flow features. The cases of forward propeller alone and aft propeller alone are also computed to distinguish the hull-propeller interaction and propeller-propeller interaction. The results show the blade loads of both forward and aft propellers strongly fluctuate with phase angles. For the forward propeller, the blade load fluctuation is mainly governed by the hull-propeller interaction, while the aft blade load is remarkably affected by the propeller-propeller interaction in terms of the load average and fluctuation pattern. The fields of pressure, vorticity and velocity are also analyzed to reveal the unsteady flow features.

Keywords

Acknowledgement

The work presented here is supported by the National Key Research and Development Program of China (2019YFD0901003), and the National Natural Science Foundation of China-Shandong Joint Fund (U1706223). We also appreciate the help of MARIN for conducting the model tests.

References

  1. Chang, B.J., Go, S., 2011. Study on a procedure for propulsive performance prediction for CRP-POD systems. J. Mar. Sci. Technol. 16, 1-7. https://doi.org/10.1007/s00773-010-0108-8
  2. Ghassemi, H., 2009. Hydrodynamic performance of coaxial contra-rotating propeller (CCRP) for large ships. Pol. Marit. Res. 16 (1), 22-28. https://doi.org/10.2478/v10012-008-0006-8
  3. Ghassemi, H., Taherinasab, M., 2013. Numerical calculations of the hydrodynamic performance of the contra-rotating propeller (CRP) for high speed vehicle. Pol. Marit. Res. 20 (2), 13-20. https://doi.org/10.2478/pomr-2013-0012
  4. Go, S., Seo, H., Chang, B.J., 2005. On the model tests for POD propulsion ships. J Ship Ocean Technol 9 (1), 1-10.
  5. He, D., Wan, D., 2017. Numerical investigation of open water performance of hybrid CRP podded propulsion system. International Conference on Computational Mechanism. Guilin, China, pp. 982-993.
  6. Hu, J., Wang, Y.Z., Zhang, W.P., Chang, X., Zhao, W., 2019. Tip vortex prediction for contra-rotating propeller using large eddy simulation. Ocean. Eng. 194, 106410. https://doi.org/10.1016/j.oceaneng.2019.106410
  7. Huang, Y.S., Dong, X.Q., Yang, C.J., Li, W., Noblesse, F., 2019. Design of wake-adapted contra-rotating propellers for high-speed underwater vehicles. Appl. Ocean Res. 91, 101880. https://doi.org/10.1016/j.apor.2019.101880
  8. International Towing Tank Conference (ITTC), 2011. The specialist committee on computational fluid dynamics-final report and recommendations to the 26th ITTC. 26th ITTC 2, 337-377.
  9. Kim, S.E., Choi, S.H., Veikonheimo, T., 2002. Model tests on propulsion systems for ultra large container vessel. 12th International Offshore and Polar Engineering Conference. Kitakyushu, Japan, pp. 520-524.
  10. Moran-Guerrero, A., Gonzalez-Gutierrez, L.M., Oliva-Remola, A., R, H., Diaz-Ojeda, 2018. On the influence of transition modeling and cross flow effects on open water propeller simulations. Ocean. Eng. 156, 101-119. https://doi.org/10.1016/j.oceaneng.2018.02.068
  11. Paik, K.J., Hwang, S., Jung, J., Lee, T., Lee, Y.Y., Ahn, H., Van, S.H., 2015. Investigation on the wake evolution of contra-rotating propeller using RANS computation and SPIV measurement. Int. J. Nav. Archit. Ocean Eng. 7, 595-609. https://doi.org/10.1515/ijnaoe-2015-0042
  12. Quereda, R., Perez-Sobrino, M., Gonzalez-Adalid, J., Soriano, C., 2017. Conventional propellers in CRP-POD confguration tests and extrapolation. Fifth International Symposium on Marine Propulsors Smp'17, Espoo. Finland.
  13. Sanchez-Caja, A., Perez-Sobrino, M., Quereda, R., Veikonheimo, T., Gonzalez-Adalid, J., Auriarte, S.A., 2013. Combination of POD, CLT and CRP propulsion for improving ship efficiency: the TRIPOD project. Third International Symposium on Marine Propulsors Smp'13. Launceston, Tasmania, Australia.
  14. Ueda, N., Oshima, A., Unseki, T., Fujita, S., et al., 2004. The first hybrid CRP-POD driven fast ROPAX ferry in the world. Mitsubishi Heavy Industries, Ltd. Technical Review 41 (6), 1-5.
  15. Usta, O., Korkut, E., 2018. A study for cavitating flow analysis using DES model. Ocean. Eng. 160, 397-411. https://doi.org/10.1016/j.oceaneng.2018.04.064
  16. Wang, R., Wang, X.Y., Wang, Z.Z., 2017a. A surface panel method for the analysis of hybrid contra-rotating shaft pod propulsor. Ocean Eng. 140, 97-104. https://doi.org/10.1016/j.oceaneng.2017.05.022
  17. Wang, Z.Z., Xiong, Y., 2013. Effect of time step size and turbulence model on the open water hydrodynamic performance prediction of contra-rotating propellers. China Ocean Eng. 27 (2), 193-204. https://doi.org/10.1007/s13344-013-0017-9
  18. Wang, Z.Z., Xiong, Y., Wang, R., Zhong, C.H., 2016. Numerical investigation of the scale effect of hydrodynamic performance of the hybrid CRP pod propulsion system. Appl. Ocean Res. 54, 26-38. https://doi.org/10.1016/j.apor.2015.10.006
  19. Wang, R., Xiong, Y., Ye, J.M., 2017b. A general equation for performance analysis of multi-component propulsor with propeller. Appl. Ocean Res. 63, 106-119. https://doi.org/10.1016/j.apor.2017.01.011
  20. Wang, R., Xiong, Y., Ye, J.M., 2017. A general equation for performance analysis of multi-componentpropulsor with propeller. Appl. Ocean Res. 63, 106-119. https://doi.org/10.1016/j.apor.2017.01.011
  21. Xiong, Y., Zhang, K., Wang, Z.Z., Qi, W.J., 2016. Numerical and experimental studies on the effect of axial spacing on hydrodynamic performance of the hybrid CRP pod propulsion system. China Ocean Eng. 30 (4), 627-636. https://doi.org/10.1007/s13344-016-0040-8
  22. Zhang, Y.X., Wu, X.P., Zhou, Z.Y., Cheng, X.K., Li, Y.L., 2019. A numerical study on the interaction between forward and aft propellers of hybrid CRP pod propulsion systems. Ocean. Eng. 186, 106084. https://doi.org/10.1016/j.oceaneng.2019.05.066