Numerical Investigation of Propeller Skew Effect on Cavitation
Journal Title: Journal of ETA Maritime Science - Year 2019, Vol 7, Issue 2
Abstract
This paper addresses the skew effects (a significant geometric property) of marine propellers on cavitation phenomenon numerically. DTMB 4381, 4382, 4383 and 4384 model propellers with different skew values have been chosen to investigate the cavity patterns on the blades under open water conditions. A lifting surface method has been applied for both non-cavitating and cavitating propellers. Numerical results (nondimensional thrust and torque coefficients, efficiency values and cavity patterns on the blades) have been validated with experimental results. It has been found that the present numerical method is accurate and reliable for predicting the hydrodynamic performance of both non-cavitating and cavitating propeller under open water conditions. It has also been found that under certain conditions the skewed blades of the propeller can cause lesser cavity patterns and improve the propeller performance.
Authors and Affiliations
Şakir BAL
Keywords
Related Articles
- EP ID EP608065
- DOI 10.5505/jems.2019.08860
- Views 76
- Downloads 0
Gemilerde Verimi Arttırmak İçin Uygulanan Yöntemlerin CO2 Emisyonlarını Azaltmaya Yönelik Etkilerinin Analizi
Son yıllarda, gemilerden kaynaklanan sera gazı emisyonlarını azaltmak için alınması gereken tedbirler ve uygulanabilir yöntemler, Uluslararası Denizcilik Örgütü’nün (IMO) yüksek öncelikli konuları arasında yer almaktadır...
A Practical Tool for Evaluating Refrigeration Systems Using R-134a
In this theoretical work, the ideal vapor-compression cycle using Refrigerant-134a (Tetrafluoroethane, a chlorine free refrigerant) is studied considering an evaporator pressure range of 100-200 kPa and a condenser press...
Kılavuzluk Hizmetlerinin Deniz Emniyetine Katkısı: İstanbul Boğazı’nda Kazaya Karışan Gemiler İle Kılavuz Kaptan Almaları Arasındaki İlişkinin Analizi
Araştırmanın amacı; kılavuzluk hizmetlerinin deniz emniyetine katkısını araştırmak, kılavuzluk hizmetlerinde rekabetin kazalara neden olduğuna ilişkin dünya örneklerini incelemek ve İstanbul Boğazı’nda 1982-2014 yılları...
Simulation-Based Analysis of Ship Motions in Short-Crested Irregular Seas
Demonstration of the seakeeping calculation results other than polar diagrams and Cartesian plots is important during the initial and detail design stages of naval platforms due to the necessity of numerical simulations...
Application of Alternative Maritime Power (AMP) Supply to Cruise Port
The International Maritime Organization, the European Union Council and the US government force ship owners to take necessary measures through international conventions and national legislation to minimize ship-based emi...