Numerical Flow Characterization around a Type 209 Submarine Using OpenFOAM

Paredes, Ruben; Quintuña, Maria T.; Arias-Hidalgo, Mijaíl; Datla, Raju V.

doi:10.3390/fluids6020066

Cited by 7 publications

(2 citation statements)

References 24 publications

(36 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite its high computational cost, the DES method used in their study was able to capture the details of the flow around the model. Using OpenFOAM, Paredes et al (2021) characterized the numerical flow around a Type 209 submarine. Prior to applying it to the Type 209 submarine, a multiphase solver was chosen and validated using a SUBOFF model.…”

Section: Introductionmentioning

confidence: 99%

Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM

2023

JAFM

View full text Add to dashboard Cite

In this research, we consider the influence of two kinds of domain on the numerical flow around a submarine model. A fully appended SUBOFF submarine model was used, and the structure and characteristics of the flow were investigated under a full domain and a symmetrical domain arrangement. The numerical simulation was carried out using the OpenFOAM software, and the flow was numerically modelled as single-phase and incompressible. The SST k-ω turbulence model was used in both domains, together with an insensitive Spalding wall function to represent the boundary layer near the wall. The results showed that simulations in both the full and symmetrical domains could accurately predict the total resistance. Compared to the symmetrical domain, the resistance value obtained with the full domain was more precise; the symmetrical domain under coarse grid conditions had an error value of 1.34%, whereas the full domain using the same grid size had an error value of 0.6%. Hence, the full domain was superior in terms of predicting the resistance with a coarse grid. Next, the pressure coefficient comparison at the leading edge of the rudder was calculated, where = 0.92, and the symmetric domain was found to have a value of 0.0747 whereas the full domain had a value of 0.236. Compared with the results from experiment (=0.302), the symmetric domain appears to give an underestimate for the pressure distribution at this position. In addition, the flow structures and properties in both domains differ, particularly in terms of the vortical structures generated by the sail and rudders. The simulation results for the full domain reveal that the flow around the SUBOFF model is asymmetric. The full domain was able to capture the flow structures in more detail than the symmetrical domain, and represented the velocity distribution at the propeller plane better. As a result, the full domain must be considered when carrying out propeller analysis and self-propulsion simulations.

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM

2023

JAFM

View full text Add to dashboard Cite

show abstract

“…At present ships and submarines use Electromagnetic Log (EM Log), Pitometer Log, and other types of speed sensors for their speed measurement [1][2] [3]. But all these sensors measure the speed of the vessel with respect to water, not ground [4].…”

Section: Introductionmentioning

confidence: 99%

Modeling of an Environmentally Independent and Contactless Speed Sensor for Measuring the Speed of Ships, Submarines, and Aircraft in Relation to the Ground Development of Image

Imam,

Islam,

Mokhtar

et al. 2023

Proceedings of International Conference on Artificial Life and Robotics

View full text Add to dashboard Cite

We are presenting a theoretical and mathematical model for an environment nondependent contactless speed sensor which can measure directly the horizontal speed of ships, submarines, and aircraft with respect to the ground. Currently, available standalone onboard speed sensors used in ships, submarines, and aircraft measure the speed of the vehicle with respect to the water or air; not ground. Thus, they are unable to measure the ground speed of these vehicles directly. In this paper, we have shown that a novel speed sensor can be designed by using small size dropped inside a vacuum chamber. The theoretical and mathematical model of the proposed sensor was further validated by simulation. The simulation results showed that unlike the conventional methods our proposed method can measure the speed of ships, submarines, and aircraft with respect to the ground directly. Another issue is that current speed sensors are environment-dependent, meaning they or their probes require some type of touch with the operational environment. This environment dependency further affects the accuracy of these sensors, as well as lays these sensors or their probes at risk of collision with external objects. However, the requirement to mount the sensor or its probes outside the vehicle is removed by our suggested sensor. The complete sensor assembly can be placed inside the vehicle.

show abstract

An investigation of scale effects on the self-propulsion characteristics of a submarine

Sezen

Doğrul

et al. 2021

Applied Ocean Research

View full text Add to dashboard Cite

Numerical Flow Characterization around a Type 209 Submarine Using OpenFOAM

Cited by 7 publications

References 24 publications

Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM

Influence of Full and Symmetrical Domains on the Numerical Flow around a SUBOFF Submarine Model using OpenFOAM

Modeling of an Environmentally Independent and Contactless Speed Sensor for Measuring the Speed of Ships, Submarines, and Aircraft in Relation to the Ground Development of Image

An investigation of scale effects on the self-propulsion characteristics of a submarine

Contact Info

Product

Resources

About