Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave Field
Numerous devices to reduce ship resistance have been suggested. One of them, a propagating hydrofoil in a wave field, can produce thrust and might be used to reduce the resistance of ships. This paper proposes the analytical solution of thrust for a two-dimensional oscillating foil with an aileron i...
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| Format: | Article |
| Language: | English |
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The Korean Society of Ocean Engineers
2025-02-01
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| Series: | 한국해양공학회지 |
| Subjects: | |
| Online Access: | https://doi.org/10.26748/KSOE.2024.077 |
| _version_ | 1826576454906806272 |
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| author | Kyeonguk Heo Yoon-Rak Choi |
| author_facet | Kyeonguk Heo Yoon-Rak Choi |
| author_sort | Kyeonguk Heo |
| collection | DOAJ |
| description | Numerous devices to reduce ship resistance have been suggested. One of them, a propagating hydrofoil in a wave field, can produce thrust and might be used to reduce the resistance of ships. This paper proposes the analytical solution of thrust for a two-dimensional oscillating foil with an aileron in propagating an unsteady wave field. Quadratic transfer functions (QTFs) of the additional thrust induced from the deflection of an aileron were derived using unsteady linear potential-flow theory. A parametric study on the thrust was conducted using the derived quadratic transfer functions. The effects of physical variables, such as heave (plunging), pitch, velocity of the wave field, and deflection of an aileron on the thrust, were investigated. First, a large phase difference between the pitch and deflection of the aileron generally produced a large thrust except for the high-frequency region. Second, the thrust induced from the heave and deflection of the aileron had the largest value when the phase difference was 0.5π. Third, the thrust induced from the wave velocity and deflection of the aileron showed different trends at each phase difference. Finally, the effects of deflection only generally had a negative value. The parametric study showed that the phase difference between motions and deflection at each frequency region mainly influences the thrust of a foil. |
| first_indexed | 2025-03-14T13:30:51Z |
| format | Article |
| id | doaj.art-e7f25ec3c1b443d398a60b926edfc19d |
| institution | Directory Open Access Journal |
| issn | 2287-6715 |
| language | English |
| last_indexed | 2025-03-14T13:30:51Z |
| publishDate | 2025-02-01 |
| publisher | The Korean Society of Ocean Engineers |
| record_format | Article |
| series | 한국해양공학회지 |
| spelling | doaj.art-e7f25ec3c1b443d398a60b926edfc19d2025-02-28T08:57:59ZengThe Korean Society of Ocean Engineers한국해양공학회지2287-67152025-02-0139192210.26748/KSOE.2024.077Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave FieldKyeonguk Heo0https://orcid.org/0000-0001-8980-0669Yoon-Rak Choi1https://orcid.org/0000-0002-3865-6721University of UlsanUniversity of UlsanNumerous devices to reduce ship resistance have been suggested. One of them, a propagating hydrofoil in a wave field, can produce thrust and might be used to reduce the resistance of ships. This paper proposes the analytical solution of thrust for a two-dimensional oscillating foil with an aileron in propagating an unsteady wave field. Quadratic transfer functions (QTFs) of the additional thrust induced from the deflection of an aileron were derived using unsteady linear potential-flow theory. A parametric study on the thrust was conducted using the derived quadratic transfer functions. The effects of physical variables, such as heave (plunging), pitch, velocity of the wave field, and deflection of an aileron on the thrust, were investigated. First, a large phase difference between the pitch and deflection of the aileron generally produced a large thrust except for the high-frequency region. Second, the thrust induced from the heave and deflection of the aileron had the largest value when the phase difference was 0.5π. Third, the thrust induced from the wave velocity and deflection of the aileron showed different trends at each phase difference. Finally, the effects of deflection only generally had a negative value. The parametric study showed that the phase difference between motions and deflection at each frequency region mainly influences the thrust of a foil.https://doi.org/10.26748/KSOE.2024.077thrustanalytic studywing with aileronpotential-flow theoryquadratic transfer functions (qtfs) |
| spellingShingle | Kyeonguk Heo Yoon-Rak Choi Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave Field 한국해양공학회지 thrust analytic study wing with aileron potential-flow theory quadratic transfer functions (qtfs) |
| title | Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave Field |
| title_full | Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave Field |
| title_fullStr | Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave Field |
| title_full_unstemmed | Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave Field |
| title_short | Analytic Study on the Thrust of Two-Dimensional Foil with Aileron in Wave Field |
| title_sort | analytic study on the thrust of two dimensional foil with aileron in wave field |
| topic | thrust analytic study wing with aileron potential-flow theory quadratic transfer functions (qtfs) |
| url | https://doi.org/10.26748/KSOE.2024.077 |
| work_keys_str_mv | AT kyeongukheo analyticstudyonthethrustoftwodimensionalfoilwithaileroninwavefield AT yoonrakchoi analyticstudyonthethrustoftwodimensionalfoilwithaileroninwavefield |