Abstract:

Today, many ships have submarines, and many of them express their submarines as the back bone of the ships. The primary task in history is to collect information without notice of the most important tasks of today’s diesel-electric submarines, which are to interrupt/control the maritime trade routes, and to be able to carry out surprising movements to the ground, underwater, ground and air targets when necessary. Even when the submarines go out on the water and even when their bodies come to the periscope depths to just make a snorkeling journey without going on the water, they can be noticed and lost their invisibility thanks to today’s high-tech radar systems. The percentage of the time the submarines charge their batteries during their trips, the percentage of the time the submarines spend under water, is called the indiscretion rate (indiscretion rate). Reducing this ratio is considered a measure of the invisibility of the submarines. As new designs and technologies are being developed, the main design goal is to draw this ratio down. The air-independent shipping systems that significantly increase the submarine submarine shipping stairs have reduced the rate of the modern submarine snorkel shipping time, and the operating area of today's submarine equipped with these systems is shifting from brown waters to blue waters. Another important factor in the shipping time ratio is the hydrodynamic form and shipping efficiency of the submarine. The more efficient form of the submarine will be able to travel longer under the water at the same speed and energy capacity, and will have a lower snorkeling time rate. Currently calculated fluid dynamics are used by designers as an effective tool and enables the hydrodynamic forms that can deliver the submarine more efficiently at the desired service speed and the pervans that push these forms to be designed with high efficiency or low acoustic speed. In this study, studies in open literature often preferred in recent years Joubert BB2 submarine form resistance calculated fluid dynamics methods were calculated and the number of turns needed to push the ship at the service speed of the pervanin used in the submarine shipping. With the designation of the shipping point and the form of the submarine, the Taylor trace ratio, the reduction of the push, the boat yield, the yield of connectivity and the yield of shipping associated with them have been calculated.

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