کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8062963 | 1520636 | 2018 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Hydrodynamic modeling and experimental validation of a cycloidal propeller
ترجمه فارسی عنوان
مدلسازی هیدرودینامیکی و اعتبار سنجی آزمایشی یک پروانه سیکلوئید
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی دریا (اقیانوس)
چکیده انگلیسی
In this paper, a lower-order unsteady hydrodynamic model of a cycloidal propeller along with in-house experiments to validate the model is presented. Towards this, the hydrodynamics of a cycloidal propeller is investigated thoroughly and various underlying physical phenomena such as dynamic virtual camber, effects of near and shed wake, leading-edge vortices are rigorously modeled. It is shown that the chord-wise variation of incidence velocity angle on cycloidal propeller blade is manifested as dynamic virtual camber, which depends on curvilinear flow geometry, pitch angle, pitch rate and inflow distribution. By including all these effects together, a generalized expression of additional lift due to virtual camber effect is developed. To capture the effects of near wake, a nonlinear lifting line model is incorporated. Rapid pitching of rotor blades produces unsteady phenomena such as strong leading-edge vortices and shed wakes. Polhamus leading-edge-suction analogy is applied to model leading-edge vortex. To capture the effects of shed wake, a method based on Theodorsen's approach is developed. A modified Double Multiple Streamtube (D-MS) model is used for modeling the complex inflow characteristics of a cycloidal propeller. The present hydrodynamic model is validated with measured time-history of forces obtained from in-house experiments at low Reynolds numbers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 154, 15 April 2018, Pages 94-105
Journal: Ocean Engineering - Volume 154, 15 April 2018, Pages 94-105
نویسندگان
Atanu Halder, Carolyn Walther, Moble Benedict,