Chapter 882 AIP Submarine (Plus 2)

The entire World War II was an era of rapid technological advancement, and all military-related technologies were developing rapidly.

During World War II, Germany adopted the wolf pack tactics, and the Allied forces reached an extreme in the development of underwater audio equipment. Sonar, a special equipment for detecting underwater sound, developed rapidly and noisy submarines were often found. .

In this way, higher requirements are placed on submarines.

Now the XXI-class submarines equipped by Germany have been improved. The biggest difference is that the previous ship type was abandoned and changed to the elongated teardrop shape common in later generations. This submarine has excellent underwater navigation ability and is the first A submarine that travels faster underwater than on the surface.

The same is true for the nuclear submarine developed from it.

"If it is a diesel-electric submarine, the diesel engine is the biggest source of noise. Now we use nuclear power. The circulating pump in the nuclear reactor and the steam turbine behind are the biggest sources of noise. We have adopted various solutions, such as arranging shock absorption bases. Wait, to reduce the noise."

The speaker is a submarine designer. In the development of this nuclear submarine, close cooperation is required from all aspects. The design of nuclear power is the joint cooperation of nuclear power experts and submarine experts.

"In addition to the noise of the submarine's engine, the other main noise is the propeller." At this time, Cyric continued to transform into an expert.

These, of course, the designers have noticed, but they have not found a suitable solution, but, of course, Cyric from later generations is clear about this.

Now, the construction of the hull has only begun, and the propellers and other components at the rear are not yet in place, but, don't look at it, Cyric also knows that it must be the most common kind of three-bladed propeller.

"If you want to reduce the noise of the propeller, you need to reduce the speed, and if you reduce the speed, the thrust will be insufficient. This solution is to increase the number of blades." Cyric said: "The current three-blade propeller is backward. Yes, we can change it to a seven-blade or nine-blade propeller, and at the same time, the propeller can also be changed to a large skew structure."

After finishing speaking, Cyric drew on a drawing in this hot factory.

The propellers have odd-numbered blades to eliminate the vibration caused by symmetry. At the same time, the large side slope is a solution to reduce noise.

However, how to skew, especially how to process, is a huge problem. In later generations, it is realized by multi-axis CNC machine tools.

Cyric just suggested an idea, and then left it to these engineers to figure out how to do it. It doesn't need to reach the level of later generations, as long as it is more advanced than now, it will be enough.

"As for the hull, I suggest that a layer of rubber-made sound-absorbing tiles can be laid on the hull, which can continue to block the internal noise from spreading outward. How to make it requires your collective efforts, and it does not have to be installed in the current On the submarine, technical pre-research can be carried out to prepare for the submarine behind."

"Führer Cyric, your sagacity is admirable," Heisenberg said.

Führer Cyric is an all-rounder. No matter what aspect, he can come up with unique insights, and more importantly, after verification, they are completely correct.

The propeller needs experts in fluid mechanics, and the sound-absorbing tile needs experts in materials, and work hard in the direction proposed by Cyric.

Cyric continued to walk on the slipway, watching the arc of fire splashing everywhere, watching the components of the submarine forming one by one, with emotion in his heart.

Nuclear submarines, in addition to attacking enemy warships, are more prepared for future nuclear bombs.

This is a long road. The test explosion of the nuclear bomb will take several years, and the miniaturization will take a long time. When the launch vehicle is installed on the submarine, many problems must be overcome.

However, no matter how much investment is made, these technologies must achieve breakthroughs. After all, this is the capital that will dominate the world in later generations, ballistic missile nuclear submarines!

Nuclear submarines are brand-new equipment. The huge displacement will drive the progress of torpedoes, sonar and other aspects. Germany will continue to maintain breakthroughs in submarine technology.

"Once this submarine is put into use, it will bring a revolutionary breakthrough. It will sail underwater from the time it leaves the port until it returns." Dönitz said with a sigh: "Unfortunately, the cost is too high. , it would be nice if our conventional submarines could also travel underwater for a long time."

The cost is high, and the number is destined to not be too many. You must know that in Dönitz's plan, his submarine force must have hundreds of them.

Before he left, after hearing Dönitz's sigh, Cyric suddenly remembered another thing, a low-cost submarine transformation scheme, known as the AIP technology of nuclear submarines in poor countries!

In fact, as early as before and after World War II, Germany and the Soviet Union had been involved in the research of AIP power plant.

For example, in 1935, the 18th Central Design Bureau of the Soviet Union proposed to use the AIP system on the submarine and tested it on the M-92 submarine, and obtained a large amount of test data.

At the same time, during World War II, the German company Walter also tried to use compressed hydrogen peroxide in submarines as a source of underwater oxygen for diesel engines.

Conventional powered submarines use diesel engines. In addition to diesel, the work of diesel engines is oxygen. Under water, below the depth of the snorkel, the diesel engine cannot be started without an oxygen source.

Therefore, as long as oxygen is carried, the diesel engine can continue to work, and the exhaust gas can be discharged out of the submarine to prevent the personnel inside the submarine from suffocating.

Only carrying ordinary oxygen requires a huge volume, so liquid oxygen can be carried, reducing the volume and increasing the voyage.

However, it is not easy to make liquid oxygen, and it is also difficult to store at low temperature.

In this way, an alternative to liquid oxygen is hydrogen peroxide, which can be decomposed into oxygen and water. When the submarine runs underwater, the hydrogen peroxide is heated by the thermal energy of the diesel engine, and then oxygen is produced for the diesel engine to use. Later, Germany built a handful of these AIP submarines.

However, Cyric doesn't like this stuff because hydrogen peroxide is extremely unstable when converted to oxygen!

From a technical point of view, it is possible to make improvements on the existing submarines, and even just insert a compartment and add a tank of hydrogen peroxide. However, Cyric does not like this technology. Submarine soldiers are originally Risking their lives to perform tasks, let alone increase the unsafe factor.

Therefore, it is better to choose the technical solution used by Huaxia in later generations.

"Everyone, have you heard of the Stirling engine?" Cyric said.