Numerical Investigation of Multi-Component Podded Propulsor Performance in Straight Flow

Antonio Sanchez Caja, Timo Rauti, Karl Ramstedt, Tuomas Sipilä

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

The notion of high efficiency related to a low loaded propeller has been sometimes misunderstood in the context of multi-component tandem or CRP units. Individual low loaded propellers working as a part of a multi-stage propulsion unit do not lead necessarily to high efficiency since high efficiency is more related to what could be called low “propulsive” loading, than to what is usually referred to as low “propeller” loading. In this paper, multi-component propulsors are numerically investigated in straight flow from the standpoint of efficiency and propeller interaction. Potential flow tools are used to illustrate the ability of different multicomponent configurations to improve efficiency. RANS methods coupled to actuator disk models are used first to validate average loads on a CRP unit and then to analyze effective wakes in a podded propulsor with three co-axial propeller components.
Original languageEnglish
Title of host publicationProceedings of the Fifth International Symposium on Marine Propulsors - smp'17
PublisherVTT Technical Research Centre of Finland
Number of pages9
ISBN (Print)978-951-38-8608-0
Publication statusPublished - 2017
MoE publication typeA4 Article in a conference publication
Event5th International Symposium on Marine Propulsors, smp'17 - Espoo, Finland
Duration: 12 Jun 201715 Jun 2017

Conference

Conference5th International Symposium on Marine Propulsors, smp'17
Abbreviated titlesmp '17
CountryFinland
CityEspoo
Period12/06/1715/06/17

Fingerprint

Propellers
Actuator disks
Potential flow
Propulsion

Keywords

  • efficiency
  • contra rotating propellers (CRP)
  • multi component propellers
  • actuator disk
  • effective wake

Cite this

Sanchez Caja, A., Rauti, T., Ramstedt, K., & Sipilä, T. (2017). Numerical Investigation of Multi-Component Podded Propulsor Performance in Straight Flow. In Proceedings of the Fifth International Symposium on Marine Propulsors - smp'17 [WA3-2] VTT Technical Research Centre of Finland.
Sanchez Caja, Antonio ; Rauti, Timo ; Ramstedt, Karl ; Sipilä, Tuomas. / Numerical Investigation of Multi-Component Podded Propulsor Performance in Straight Flow. Proceedings of the Fifth International Symposium on Marine Propulsors - smp'17. VTT Technical Research Centre of Finland, 2017.
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title = "Numerical Investigation of Multi-Component Podded Propulsor Performance in Straight Flow",
abstract = "The notion of high efficiency related to a low loaded propeller has been sometimes misunderstood in the context of multi-component tandem or CRP units. Individual low loaded propellers working as a part of a multi-stage propulsion unit do not lead necessarily to high efficiency since high efficiency is more related to what could be called low “propulsive” loading, than to what is usually referred to as low “propeller” loading. In this paper, multi-component propulsors are numerically investigated in straight flow from the standpoint of efficiency and propeller interaction. Potential flow tools are used to illustrate the ability of different multicomponent configurations to improve efficiency. RANS methods coupled to actuator disk models are used first to validate average loads on a CRP unit and then to analyze effective wakes in a podded propulsor with three co-axial propeller components.",
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Sanchez Caja, A, Rauti, T, Ramstedt, K & Sipilä, T 2017, Numerical Investigation of Multi-Component Podded Propulsor Performance in Straight Flow. in Proceedings of the Fifth International Symposium on Marine Propulsors - smp'17., WA3-2, VTT Technical Research Centre of Finland, 5th International Symposium on Marine Propulsors, smp'17, Espoo, Finland, 12/06/17.

Numerical Investigation of Multi-Component Podded Propulsor Performance in Straight Flow. / Sanchez Caja, Antonio; Rauti, Timo; Ramstedt, Karl; Sipilä, Tuomas.

Proceedings of the Fifth International Symposium on Marine Propulsors - smp'17. VTT Technical Research Centre of Finland, 2017. WA3-2.

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Numerical Investigation of Multi-Component Podded Propulsor Performance in Straight Flow

AU - Sanchez Caja, Antonio

AU - Rauti, Timo

AU - Ramstedt, Karl

AU - Sipilä, Tuomas

PY - 2017

Y1 - 2017

N2 - The notion of high efficiency related to a low loaded propeller has been sometimes misunderstood in the context of multi-component tandem or CRP units. Individual low loaded propellers working as a part of a multi-stage propulsion unit do not lead necessarily to high efficiency since high efficiency is more related to what could be called low “propulsive” loading, than to what is usually referred to as low “propeller” loading. In this paper, multi-component propulsors are numerically investigated in straight flow from the standpoint of efficiency and propeller interaction. Potential flow tools are used to illustrate the ability of different multicomponent configurations to improve efficiency. RANS methods coupled to actuator disk models are used first to validate average loads on a CRP unit and then to analyze effective wakes in a podded propulsor with three co-axial propeller components.

AB - The notion of high efficiency related to a low loaded propeller has been sometimes misunderstood in the context of multi-component tandem or CRP units. Individual low loaded propellers working as a part of a multi-stage propulsion unit do not lead necessarily to high efficiency since high efficiency is more related to what could be called low “propulsive” loading, than to what is usually referred to as low “propeller” loading. In this paper, multi-component propulsors are numerically investigated in straight flow from the standpoint of efficiency and propeller interaction. Potential flow tools are used to illustrate the ability of different multicomponent configurations to improve efficiency. RANS methods coupled to actuator disk models are used first to validate average loads on a CRP unit and then to analyze effective wakes in a podded propulsor with three co-axial propeller components.

KW - efficiency

KW - contra rotating propellers (CRP)

KW - multi component propellers

KW - actuator disk

KW - effective wake

M3 - Conference article in proceedings

SN - 978-951-38-8608-0

BT - Proceedings of the Fifth International Symposium on Marine Propulsors - smp'17

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Sanchez Caja A, Rauti T, Ramstedt K, Sipilä T. Numerical Investigation of Multi-Component Podded Propulsor Performance in Straight Flow. In Proceedings of the Fifth International Symposium on Marine Propulsors - smp'17. VTT Technical Research Centre of Finland. 2017. WA3-2