Predicting Unsteady Loads in Marine Propulsor Crashback Using Large Eddy Simulation
Propulsor crashback is an off-design operating condition where a propulsor rotates in the reverse direction to yield negative thrust. Crashback is characterized by the interaction of the free stream with the reverse flow generated by propulsor rotation. This causes a highly unsteady vortex ring whic...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2012-01-01
|
| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2012/543096 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832552471637000192 |
|---|---|
| author | Hyunchul Jang Aman Verma Krishnan Mahesh |
| author_facet | Hyunchul Jang Aman Verma Krishnan Mahesh |
| author_sort | Hyunchul Jang |
| collection | DOAJ |
| description | Propulsor crashback is an off-design operating condition where a propulsor rotates in the reverse direction to yield negative thrust. Crashback is characterized by the interaction of the free stream with the reverse flow generated by propulsor rotation. This causes a highly unsteady vortex ring which leads to flow separation and unsteady forces and moments on the blades. Large eddy simulation (LES) is performed for marine propulsors in crashback for various configurations and advance ratios and validated against experiments. The predictive capability of LES as a tool for propulsor crashback is demonstrated on an open propulsor, open propulsor with a submarine hull, and ducted propulsor with and without stator blades. LES is in good agreement with experiments for the mean and RMS levels, and spectra of the unsteady loads on the propulsors. |
| format | Article |
| id | doaj-art-f823c375305c48e19097c70f5523cbbb |
| institution | Kabale University |
| issn | 1023-621X 1542-3034 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Rotating Machinery |
| spelling | doaj-art-f823c375305c48e19097c70f5523cbbb2025-02-03T05:58:37ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342012-01-01201210.1155/2012/543096543096Predicting Unsteady Loads in Marine Propulsor Crashback Using Large Eddy SimulationHyunchul Jang0Aman Verma1Krishnan Mahesh2Department of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455, USADepartment of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455, USADepartment of Aerospace Engineering and Mechanics, University of Minnesota, Minneapolis, MN 55455, USAPropulsor crashback is an off-design operating condition where a propulsor rotates in the reverse direction to yield negative thrust. Crashback is characterized by the interaction of the free stream with the reverse flow generated by propulsor rotation. This causes a highly unsteady vortex ring which leads to flow separation and unsteady forces and moments on the blades. Large eddy simulation (LES) is performed for marine propulsors in crashback for various configurations and advance ratios and validated against experiments. The predictive capability of LES as a tool for propulsor crashback is demonstrated on an open propulsor, open propulsor with a submarine hull, and ducted propulsor with and without stator blades. LES is in good agreement with experiments for the mean and RMS levels, and spectra of the unsteady loads on the propulsors.http://dx.doi.org/10.1155/2012/543096 |
| spellingShingle | Hyunchul Jang Aman Verma Krishnan Mahesh Predicting Unsteady Loads in Marine Propulsor Crashback Using Large Eddy Simulation International Journal of Rotating Machinery |
| title | Predicting Unsteady Loads in Marine Propulsor Crashback Using Large Eddy Simulation |
| title_full | Predicting Unsteady Loads in Marine Propulsor Crashback Using Large Eddy Simulation |
| title_fullStr | Predicting Unsteady Loads in Marine Propulsor Crashback Using Large Eddy Simulation |
| title_full_unstemmed | Predicting Unsteady Loads in Marine Propulsor Crashback Using Large Eddy Simulation |
| title_short | Predicting Unsteady Loads in Marine Propulsor Crashback Using Large Eddy Simulation |
| title_sort | predicting unsteady loads in marine propulsor crashback using large eddy simulation |
| url | http://dx.doi.org/10.1155/2012/543096 |
| work_keys_str_mv | AT hyunchuljang predictingunsteadyloadsinmarinepropulsorcrashbackusinglargeeddysimulation AT amanverma predictingunsteadyloadsinmarinepropulsorcrashbackusinglargeeddysimulation AT krishnanmahesh predictingunsteadyloadsinmarinepropulsorcrashbackusinglargeeddysimulation |