Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method
This paper discusses several modelling aspects that are important for the performance predictions of a ducted propulsor with a low-order Panel Method. The aspects discussed are the alignment of the wake geometry, the influence of the duct boundary layer on the wake pitch, and the influence of a tran...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Rotating Machinery |
| Online Access: | http://dx.doi.org/10.1155/2012/474785 |
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| author | J. Baltazar J. A. C. Falcão de Campos J. Bosschers |
| author_facet | J. Baltazar J. A. C. Falcão de Campos J. Bosschers |
| author_sort | J. Baltazar |
| collection | DOAJ |
| description | This paper discusses several modelling aspects that are important for the performance predictions of a ducted propulsor with a low-order Panel Method. The aspects discussed are the alignment of the wake geometry, the influence of the duct boundary layer on the wake pitch, and the influence of a transpiration velocity through the gap. The analysis is carried out for propeller Ka4-70 operating without and inside a modified duct 19A, in which the rounded trailing edge is replaced by a sharp trailing edge. Experimental data for the thrust and torque are used to validate the numerical results. The pitch of the tip vortex is found to have a strong influence on the propeller and duct loads. A good agreement with the measurements is achieved when the wake alignment is corrected for the presence of the duct boundary layer. |
| format | Article |
| id | doaj-art-e64b5b3a08ec4eadbe4b4219cdcd3c5f |
| 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-e64b5b3a08ec4eadbe4b4219cdcd3c5f2025-08-20T03:26:04ZengWileyInternational Journal of Rotating Machinery1023-621X1542-30342012-01-01201210.1155/2012/474785474785Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel MethodJ. Baltazar0J. A. C. Falcão de Campos1J. Bosschers2Department of Mechanical Engineering, Marine Environment and Technology Center (MARETEC), Instituto Superior Técnico (IST), Technical University of Lisbon, 1049-001 Lisbon, PortugalDepartment of Mechanical Engineering, Marine Environment and Technology Center (MARETEC), Instituto Superior Técnico (IST), Technical University of Lisbon, 1049-001 Lisbon, PortugalMaritime Research Institute Netherlands (MARIN), Wageningen, The NetherlandsThis paper discusses several modelling aspects that are important for the performance predictions of a ducted propulsor with a low-order Panel Method. The aspects discussed are the alignment of the wake geometry, the influence of the duct boundary layer on the wake pitch, and the influence of a transpiration velocity through the gap. The analysis is carried out for propeller Ka4-70 operating without and inside a modified duct 19A, in which the rounded trailing edge is replaced by a sharp trailing edge. Experimental data for the thrust and torque are used to validate the numerical results. The pitch of the tip vortex is found to have a strong influence on the propeller and duct loads. A good agreement with the measurements is achieved when the wake alignment is corrected for the presence of the duct boundary layer.http://dx.doi.org/10.1155/2012/474785 |
| spellingShingle | J. Baltazar J. A. C. Falcão de Campos J. Bosschers Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method International Journal of Rotating Machinery |
| title | Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method |
| title_full | Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method |
| title_fullStr | Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method |
| title_full_unstemmed | Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method |
| title_short | Open-Water Thrust and Torque Predictions of a Ducted Propeller System with a Panel Method |
| title_sort | open water thrust and torque predictions of a ducted propeller system with a panel method |
| url | http://dx.doi.org/10.1155/2012/474785 |
| work_keys_str_mv | AT jbaltazar openwaterthrustandtorquepredictionsofaductedpropellersystemwithapanelmethod AT jacfalcaodecampos openwaterthrustandtorquepredictionsofaductedpropellersystemwithapanelmethod AT jbosschers openwaterthrustandtorquepredictionsofaductedpropellersystemwithapanelmethod |