A Multi-Objective Approach for Determining the Number of Blades on a Naca Marine Propeller

Nouri, Mahtab; Mohammadi, Sara

doi:10.21278/brod67202

Cited by 5 publications

(2 citation statements)

References 10 publications

(7 reference statements)

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“…Similar to what was found by [24], the increase of thrust coefficient at Z=5 was basically occurred due to the dark blue contour region (low pressure area), as clearly displayed in Figure 7 (c). It can be concluded here that the increase of blade numbers will reduce the static pressure around the propeller blade as supported by [25]. Referring to the CFD simulation results above, it can be concluded that the propeller performance achieved maximum 𝜂 within the range of 0.8 ≤ J ≤ 0.9 regardless of a number of blades (see Table 3).…”

Section: Resultssupporting

confidence: 51%

Computational Prediction of a Propeller Performance in Open Water Condition

Fitriadhy

Adam

Quah³

2020

Sinergi

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In presence of hydrodynamics phenomena occur surrounding propeller evidently affects on accuracy’s prediction of thrust, torque and its efficiency. To achieve the objective, a Computational Fluid Dynamics (CFD) simulations approach is then proposed to obtain a reliable prediction of the thrust (KT), torque (KQ) and efficiency (η) coefficients in open water condition. The effect of various blade numbers associated with constant propeller revolution (RPM=1320) and pitch ratio (P/D=1.0); are performed within the range of advance ratio from 0.1J1.0. The results revealed that the increase of blade number from Z=3 to 5 was proportional with the increase of thrust (KT) and torque (KQ) coefficients; meanwhile, it was reduced the maximum efficiency (η) that possibly lead to downgrade the propeller performance. It should be noted here, the propeller with three blade numbers (Z=3) provide the highest efficiency (η) up to 78.8% at J=0.9. These CFD simulation results are very useful as a preliminary study of propeller characteristics.

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Section: Resultssupporting

confidence: 51%

Computational Prediction of a Propeller Performance in Open Water Condition

Fitriadhy

Adam

Quah³

2020

Sinergi

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“…The more the number of blades, the greater the aerodynamic interference between the blades. In this paper, the commonly used double blade propeller is selected (Mohammad and Saber, 2016; Bakhtiari and Ghassemi, 2020).…”

Section: Propeller Designmentioning

confidence: 99%

Design and aerodynamic characteristics analysis of propellers for a novel rescue unmanned aerial vehicle

Guan,

2023

AEAT

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Purpose To solve the shortcomings of existed search and rescue drones, search and rescue the trapped people trapped in earthquake ruins, underwater and avalanches quickly and accurately, this paper aims to propose a four-axis eight-rotor rescue unmanned aerial vehicle (UAV) which can carry a radar life detector. As the design of propeller is the key to the design of UAV, this paper mainly designs the propeller of the UAV at the present stage. Design/methodology/approach Based on the actual working conditions of UAVs, this paper preliminarily estimated the load of UAVs and the diameters of propellers and designed the main parameters of propellers according to the leaf element theory and momentum theory. Based on the low Reynolds number airfoil, this paper selected the airfoil with high lift drag ratio from the commonly used low Reynolds number airfoils. The chord length and twist angle of propeller blades were calculated according to the Wilson method and the maximum wind energy utilization coefficient and were optimized by the Asymptotic exponential function. The aerodynamic characteristics of the designed single propeller and coaxial propeller under different installation pitch angles and different installation distances were analyzed. Findings The results showed that the design of coaxial twin propellers can increase the load capacity by about 1.5 times without increasing the propeller diameter. When the installation distance between the two propellers was 8 cm and the tilt angle was 15° counterclockwise, the aerodynamic characteristics of the coaxial propeller were optimal. Originality/value The novelty of this work came from the conceptual design of the new rescue UAV and its numerical optimization using the Wilson method combined with the maximum wind energy utilization factor and the exponential function. The aerodynamic characteristics of the common shaft propeller were analyzed under different mounting angles and different mounting distances.

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Numerical investigation of the effects of camber ratio on the hydrodynamic performance of a marine propeller

Nouri

Mohammadi

2018

Ocean Engineering

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A Multi-Objective Approach for Determining the Number of Blades on a Naca Marine Propeller

Cited by 5 publications

References 10 publications

Computational Prediction of a Propeller Performance in Open Water Condition

Computational Prediction of a Propeller Performance in Open Water Condition

Design and aerodynamic characteristics analysis of propellers for a novel rescue unmanned aerial vehicle

Numerical investigation of the effects of camber ratio on the hydrodynamic performance of a marine propeller

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