Chapter 324 Jiaolong's entering the sea (1)

In developed countries, the confidential management of submarine propeller is very strict. Usually, even a picture will not be seen by outsiders. All their submarines are built in closed docks. They either enter the water directly from the docks, or completely wrap the propeller. Only after the submarine enters the water, can they dismantle it. All these are just to ensure that the propeller's secret is as far as possible Other countries know.

For example, some countries with the top manufacturing strength, such as Germany and tunghor, have the same processing ability as any other country. Even if it's just a simple image, they can immediately find out the mystery. Even if they can't compete with it by virtue of pictures, they can at least get close to it as much as possible.

Dongchen's two sets of 11 blade large skew propellers are firmly wrapped by special canvas in the processing center and packed into special wooden boxes to ensure that they are completely fixed and fully protected.

The two top-level propellers were loaded with heavy trucks the next night, and escorted by three Dongchen C3 cross-country vehicles, they went to Haining, a port city near Zhonghai City, which is subordinate to Zhonghai. Here, there are the largest military port and military ship building center in China.

Zhang Yunfeng is also in one of the C3 vehicles. The three C3 vehicles are purchased by the state from Dongchen automobile and belong to the Armed Police Corps of Nanjiang province. In addition to Zhang Yunfeng and director Liu, all the three vehicles, including all the people in the heavy truck, are all special policemen assigned by the Armed Police Corps to perform top secret tasks.

Even these special police officers don't know what they are involved in escorting and transporting. They are only ordered to send two six meter wide wooden boxes on the heavy truck and two people in the car to Haining before dawn.

Zhang Yunfeng and director Liu are sitting in the back row of C3. They seldom talk all the way. Even if they talk, the content has nothing to do with propeller and nuclear submarine. However, both of them know that when these two propellers arrive in Haining and are loaded into the new submarine under test, I'm afraid that the submarine technology of the whole porcelain country will enter a new era.

Jiangcheng is not far from Zhonghai. Even it takes more than five hours to get to Haining. When it comes to Haining, the sky is only a little bright. As soon as the motorcade drives out of the expressway, four cars wait at the exit of the expressway. The heavy truck is handed over to the soldiers who come to meet it. Director Liu and Zhang Yunfeng board another domestic cheetah cross-country, Subsequently, all the special police of Nanjiang armed police received the order to return immediately.

These soldiers carried Zhang Yunfeng and Liu Ganshi on their way. In a port classified as a military forbidden area, the car drove into a huge dock. The top cover area of the dock is even larger than that of Yanjing south station. Inside the top cover, in addition to various heavy equipment, several ships of various types are parked in special grooves The other end of the groove is connected with the sea water, but at this time, the sea water is blocked by a thick isolation door.

The team went through several construction sites without lights on. When the car turned a corner, Zhang Yunfeng's attention was completely attracted by the things in front of him.

It's a huge metal object with a dark body and a whole structure like a water drop. Although it's only bald at the end, it looks very abrupt. The whole shape is very domineering. As a quasi army fan, Zhang Yunfeng has always been very curious and yearning for submarines. This is the most important weapon in the navy in the world today. In fact, it's far from practical Bigger than an aircraft carrier.

!

Yesterday, the leading experts who had returned from Jiangcheng immediately met director Zhang Yunfeng and director Liu who had just come down from the car. One of the chief designers said excitedly: "the participants of the whole project, after learning that we have eleven large skewed propellers, are excited and impatient. They have been waiting for us for a long time!"

As he said, he introduced to Zhang Yunfeng and director Liu: "this is the third generation strategic nuclear submarine that we are in the test state. The model has not been determined. At present, there is only this one, two propellers. One of them will be applied to this test submarine, and the other is class 094. It will enter the port at noon today, and then it will enter the maintenance dock, where it will replace the other Propeller and two submarines will be tested in the sea at the same time. Our surface test vessels and equipment are ready for sea tonight. "

Liu said excitedly, "I don't know how much these two propellers can optimize the noise of our submarines."

The chief designer smiled helplessly and said: "the biggest problem of our submarines is the noise. Whether it is attacking nuclear submarines or strategic nuclear submarines, or even conventional submarines, they are suffering from the noise."

He added: "our 092, the first generation of strategic nuclear submarines, has a noise level of 165 decibels. 094 is better. The technology of e country is stronger than ours. Their active strategic nuclear submarines can basically reach the standard of 120 decibels, while the technology of American strategic nuclear submarines is the best, basically around 100110 decibels."

At this time, one of the big wooden boxes has been carefully disassembled. A group of top domestic engineers have been watching and marveling around the big guy. The chief designer took two people to the front and started science popularization at the same time, saying: "the ocean has background noise. Generally speaking, if the noise of the submarine at the bottom of the sea is less than 90 decibels, it is basically the same as the ocean The background noise is the same. In this way, the detectability of the submarine itself is extremely low. However, even the Americans can't reach this standard. If anyone can make a submarine with a noise lower than 90 decibels, it's against the sky. There are all kinds of theories on the Internet all day long to boast that the submarine noise of which country or even China has reached more than 80 decibels It's a rumor that we laughed at it. The decibels of submarine noise in all countries are top secret. In addition to the ability of Americans to occasionally monitor submarines in all countries around the world, we can only speculate about a rough value. Those who say that the decibels of submarines in other countries are even detailed to a single digit can basically choose to ignore. "

Zhang Yunfeng nodded thoughtfully. The noise problem of China's submarines has always been the biggest constraint on the submarine's combat effectiveness. American military experts once laughed at China's submarines, saying that the noise made by China's submarines near China's coast can be monitored even in Saigon, Vietnam. Although it is an exaggerated irony, it also highlights China's shortcomings in this respect.

Then Zhang asked, "what's the noise of this new submarine when it uses seven blade propeller?"

The chief designer does not keep Zhang Yunfeng and director Liu secret. Director Liu has enough identity and power to know the data at any time. Zhang Yunfeng nodded and said that there should be no concealment. Therefore, he said without hesitation: "this new submarine has made a breakthrough in noise reduction. It uses seven blade propeller and underwater noise is about 1 About 30 decibels, of course, I'm talking about low speed. "

Said, the chief designer said with a smile: "if we can reduce the noise by 20 decibels, it will be a huge leap!"

Zhang Yunfeng is not sure about this, because the submarine noise comes from many aspects, especially the nuclear powered aircraft carrier, which is huge in size, complex in structure and more complex in power part. First, the nuclear reactor, then the steam generation system, then the steam turbine, then the transmission system and the screw propeller.

The general principle is that the pressurized water nuclear reactor burns nuclear materials to generate heat energy, which makes the water reach thousands of degrees of high temperature under high pressure without boiling, and then generates huge steam power through the steam generation system to promote the steam turbine and drive the propeller. This whole link is not only a complex structure, but also the source of noise. Even now, the 11 blade large side inclined propeller It has very high performance and noise reduction ability, but the noise of other links is still not improved.

At this time, an engineer came to the chief designer and said, "Mr. Qu, Liu Gong asked me to ask you, is it right to start the reactor now?"

The chief designer looked at the time and said, "it's not six o'clock yet. It's time to start at eight o'clock on time."

"OK." The engineer nodded and immediately turned away.

The chief designer said to Zhang Yunfeng and director Liu: "the reactor start-up takes about 13 hours, mainly because of the prevention of thermal shock and the gradual rise of the temperature of the reactor. Start the reactor at eight o'clock, and it should be ready by about nine o'clock in the evening. This time is enough for us to replace the new propeller, while the other 094, At noon, the reactor will not be shut down, and the new propeller will be installed directly. By about 12 o'clock in the morning, two ships will enter the sea at the same time. "

Propeller hoisting is not a very difficult thing, but it took less than two hours to complete the installation. At eight o'clock in the morning, the reactor on the new submarine started on time. Zhang Yunfeng and Liu officer were arranged to have lunch in the canteen of the shipyard at noon. By noon, a newly commissioned 094 nuclear submarine entered the port from the water. It has been installed for several years, and it is not news for western countries. Western countries have enough knowledge of this type of strategic nuclear submarine. Up to now, they have little effort to monitor and study this submarine. Therefore, with the normal situation of return to port supply, 094 has entered the maintenance and supply dock from the water, and everything seems to be normal However, no one knew that the 094 was immediately replaced with another 11 blade large skewed propeller designed and manufactured by Dongchen after entering the port.

Zhang Yunfeng is very interested in nuclear submarines. In fact, he now has all the manufacturing technologies of the world's top nuclear submarines, i.e. Ohio's nuclear submarines, and even the technologies of the later generations of strategic nuclear submarines in Ohio. Just because he has enough knowledge of nuclear submarines, Zhang Yunfeng is very interested in this ghost like weapon.

the strategic nuclear submarine is the king of all submarines. The only task of this submarine is to carry out sea based strategic nuclear attack. Its strategic and practical significance is far more effective than any kind of nuclear weapon.

In today's satellite era, all land-based nuclear missiles are exposed to the enemy. Once a war breaks out, all land-based launch wells and nuclear warheads