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.",
    keywords = "efficiency, contra rotating propellers (CRP), multi component propellers, actuator disk, effective wake",
    author = "{Sanchez Caja}, Antonio and Timo Rauti and Karl Ramstedt and Tuomas Sipil{\"a}",
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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

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

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    AU - Rauti, Timo

    AU - Ramstedt, Karl

    AU - Sipilä, Tuomas

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    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.

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    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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    ER -

    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