Nonlinear Modeling and Identification of Underwater Thruster

Husaini, A.B.; Anam, Khoirul; Samad, Z.; Arshad, Mohd Rizal

doi:10.4028/www.scientific.net/amr.622-623.1217

Cited by 2 publications

(2 citation statements)

References 7 publications

(7 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The domain inlet boundary was at a distance of 1 Lmodel forward of the wing system while the outlet boundary was located 3 Lmodel aft of the model. The domain height was 1.5 Lmodel with extra depth equal to the tether length and its width was 2 Lmodel [20]. Three different mesh sizes were evaluated in our study for the 16 wing-system model.…”

Section: Computational Domain and Grid Generationmentioning

confidence: 99%

Resistance Evaluation for the Submerged Glider System using CFD Modelling

Ahmed

2023

ARASET

View full text Add to dashboard Cite

The underwater gliders are type of autonomous underwater vehicles, which are in their way to be used instead of traditional propellers or thrusters. They are used as submerged gliders or as a part connected to floating hull which is propelled by it. The underwater system depends on different number of hydrofoils (underwater wings) that allow it to glide forward while descending through the water. This paper concentrates on three critical design details: profile of the wings, multiple flapping wings and their angle of attack (AoA), and a method is focused on the mesh generation to predict calm water resistance for the submerged glider system while considering the profile and the maximum rotating angle of the wings and rudder. Flow around submerged wing system model has been calculated at different Froude numbers ranging from 0.1 to 0.6. The grid generator is established for meshing the computational domain with structured hexahedral and unstructured tetrahedral grid. Simulations are carried out using commercial CFD code ANSYS Fluent 19 to calculate calm water resistance of the submerged glider system with different number of hydrofoils. The results conclude that the cambered plate was chosen to design the rudder at 19 o AOA and the hydrofoil NACA0012 can be practically applied in the design of the wings at 15 o AOA from the resistance point of view. In addition, this investigation introduces a new application for CFD calculations in estimating the resistance of the submerged glider system.

show abstract

Section: Computational Domain and Grid Generationmentioning

confidence: 99%

Resistance Evaluation for the Submerged Glider System using CFD Modelling

Ahmed

2023

ARASET

View full text Add to dashboard Cite

show abstract

“…Therefore, it must be formed precisely in order to avoid unnecessary movement of the blade, which could affect the propeller performance. One of the main parameters that could affect the propeller performance is the twist angle and it's depends on the orientation of the blade, and the accuracy the blade assembly [9].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Geometrical Defect of AA6061-T4 Cold Embossing Using FEM

Abdullah

Sapuan

Samad

et al. 2011

AMM

View full text Add to dashboard Cite

Accuracy of the net-shape manufacturing such as forging becomes critical as the process depends on many factors. Defect will harm the assembly tend to affect the performance of the part. Therefore, it must be detected and minimized it as soon as the manufacturing begins. Small size and complexity of the part limits the defective part to be assessed. The paper presents an investigation on the defect of the cold embossing pin. In this work, the effect of design and process parameters to the formation of defect was studied using 2-D FE analysis. The defect can be measured based on the incomplete filling of the region from the FE result. The results show that, the FE observations are in good agreement with the experimental result.

show abstract

Nonlinear Modeling and Identification of Underwater Thruster

Cited by 2 publications

References 7 publications

Resistance Evaluation for the Submerged Glider System using CFD Modelling

Resistance Evaluation for the Submerged Glider System using CFD Modelling

Investigation of Geometrical Defect of AA6061-T4 Cold Embossing Using FEM

Contact Info

Product

Resources

About