Developed countries are very strict about the secret management of submarine propellers. Normally, even a photo will not be seen by outsiders. All their submarines are built in closed docks. They either enter the water directly from the dock or put the propellers into the water.
It is completely wrapped and will only be removed after the submarine enters the water. Everything is just to ensure that the secret of the propeller is not known to other countries as much as possible.
For example, some countries with top manufacturing capabilities, such as Germany and Japan, their processing capabilities are not inferior to any other country. Even if it is just a simple image data, they can immediately explore the secrets, even if they cannot achieve it with pictures.
A height that rivals that, but at least has the ability to be as close as possible.
The two sets of 11-blade large side-inclined propellers processed by Dongchen are tightly wrapped in special canvas in the processing center and put into special wooden boxes to ensure that they are completely fixed and fully secured within the wooden boxes.
Protect.
These two top-notch propellers were loaded onto heavy-duty trucks on the night of the second day, and escorted by three Dongchen C3 off-road vehicles, they headed to Haining. Haining is a port city close to Zhonghai City and belongs to China Shipping.
Here, there is the largest military port and military ship building center in the country.
Zhang Wenhao was also in one of the C3s. These three C3s were purchased by the state from Dongchen Automobile and belonged to the Nanjiang Provincial Armed Police Corps. Except for Zhang Wenhao and Officer Liu, everyone in the three cars, including the heavy truck, was
They are all special police deployed by the Armed Police Corps to perform top-secret missions.
Even these special police officers did not know what they were involved in escorting and transporting. They just received orders. They must deliver the two large wooden boxes up to six meters wide on the heavy truck and the two people in the car before dawn.
Haining.
Zhang Wenhao and Director Liu were sitting in the back row of C3, and they rarely talked along the way. Even if they did chat, the content had nothing to do with propellers or nuclear submarines. However, both of them knew that when the two propellers arrived in Haining, they would be installed.
After the new submarines are being tested, I am afraid that the entire Chinese submarine technology will enter a new era.
Jiangcheng is not far from Zhonghai. Even to Haining, it only took more than five hours. When we arrived in Haining, the sky was just a little brighter, and as soon as the convoy exited the highway, there were four vehicles
The car was waiting at the exit of the highway, and the heavy truck was handed over to the soldiers who came to greet them. Officer Liu and Zhang Wenhao boarded another domestic Cheetah off-road vehicle. Subsequently, all the Nanjiang Armed Police Special Police who followed received the order and immediately returned to the original route.
These soldiers drove Zhang Wenhao and Officer Liu forward. In a port that was classified as a military restricted area, the car drove into a huge dock. The roof area of this dock was even larger than the roof of Yanjing South Station.
Much larger, and inside the top cover, in addition to various heavy equipment, several ships of various types are parked in special grooves, and the other end of the groove is connected to the sea water, but
At this time, the sea water was blocked by thick isolation doors.
The convoy passed through several construction sites without lights on. When the car turned a corner, Zhang Wenhao's attention was completely attracted by what was in front of him.
It was a huge metal object that was completely black and had an overall structure like a water drop. Although it was only bare at the tail end, which looked very abrupt, the overall shape was quite domineering. As a quasi-military fan, Zhang Wenhao was very interested in submarines.
I have always been very curious and yearned for this kind of thing. It is the most important weapon in the navy in today's world, and its practicality is far greater than that of aircraft carriers.
The convoy stopped in front of the submarine construction site. The engineers who had been waiting for a long time immediately began to unload the two huge wooden boxes from the truck. The heavy-duty hoisting machine horizontally above the submarine was already ready. Waiting for these two large wooden boxes
Unparalleled underwater weapon!
The leading experts who had returned from Jiangcheng yesterday immediately met Zhang Wenhao and Director Liu who had just got off the car. One of the chief designers said excitedly: "Everyone involved in the entire project, after learning that we have
After seeing the 11-bladed large-bladed propeller, I was so excited that I had been waiting impatiently for a long time!"
As he spoke, he introduced to Zhang Wenhao and Director Liu: "This is our third-generation strategic nuclear submarine that is currently in testing. The model has not yet been determined. Currently, there is only this one with two propellers, one of which will
Applied to this test submarine, there is also a 094 class. It will enter the port at noon today and will then enter the maintenance dock, where another propeller will be replaced. The two submarines will enter the sea for testing at the same time. Our surface test vessels and equipment will also
It's ready and you can go to sea tonight."
Director Liu couldn't help but said with excitement: "I wonder how much these two propellers can optimize the noise of our submarine."
The chief designer smiled helplessly and said: "The biggest problem of our submarines is noise. Whether they are attack nuclear submarines, strategic nuclear submarines, or even conventional submarines, they all suffer from noise."
After that, he added: "Our 092, which is the first generation strategic nuclear submarine, has an underwater noise of 165 decibels. The 094 is better, around 140. Russia's technology is stronger than ours. Their active strategic nuclear submarines
, can basically reach the standard of 120 decibels, and the Americans have the best strategic nuclear submarine technology, which is basically around 100-110 decibels."
At this time, one of the large wooden boxes had been carefully dismantled. A group of top domestic engineers surrounded the big guy and kept looking at it and marveling at it. The chief designer led the two of them forward.
He started popularizing science and said: "The ocean has background noise. Generally speaking, if the noise of a submarine on the seabed is less than 90 decibels, it is basically the same as the background noise of the ocean. In this way, the submarine's own reliability
The detectability is extremely low, but even Americans cannot meet this standard. If anyone can build a submarine with a noise lower than 90 decibels, it will be simply unbelievable. There are various theories on the Internet all day long.
, the noise of submarines in any country, even China, has reached more than 80 decibels. We just laughed when we heard such rumors. The noise decibels of submarines in various countries are all top secret, except for Americans who have the ability to occasionally
In addition to detailed monitoring of submarines in various countries around the world, we can only speculate on a rough value. Those who say that the decibel level of other countries' submarines is even detailed to single digits can basically choose to ignore it."
Zhang Wenhao nodded thoughtfully. The noise problem of Chinese submarines has always been the biggest constraint on submarine combat effectiveness. American military experts once laughed at Chinese submarines. They said that the noise made by Chinese submarines in China's offshore waters can be heard even in Saigon, Vietnam.
Although it was an exaggerated sarcasm, it also highlighted China's shortcomings in this regard.
Immediately, Zhang Wenhao asked: "How much noise does this new submarine make when it uses a seven-blade propeller?"
The chief designer did not keep Zhang Wenhao and Director Liu secret. Director Liu had enough identity and power to know these data at any time, and Zhang Wenhao was the one who nodded and said not to hide anything, so he said without hesitation:
"This new submarine has made some breakthroughs in noise reduction. It uses a seven-blade propeller and the underwater noise is about 130 decibels. Of course, I am talking about low speed."
Saying that, the chief designer smiled and said: "We have replaced this advanced eleven-blade large side-inclined propeller. If the noise can be reduced by 20 decibels, it will be a huge leap!"
Zhang Wenhao is not sure about this, because submarine noise comes from many aspects, especially nuclear-powered aircraft carriers, which are huge and complex in structure, and the power part is even more complicated, first the nuclear reactor, then the steam generation system, then the steam turbine, and then
to the transmission system and propeller.
The general principle is that the pressurized water nuclear reactor burns nuclear raw materials to generate heat, causing the water to reach thousands of degrees high temperature under high pressure without boiling. It then generates huge steam power through the steam generation system to push the steam turbine and drive the propeller. This entire process
, not only has a complex structure, but it is also the source of noise. Even though the current eleven-blade large side-inclined propeller has extremely high performance and noise reduction capabilities, the noise in other aspects still cannot be improved in any way.
At this time, an engineer ran over and asked the chief designer: "Mr. Qu, Gong Liu, let me ask you, do you want to start the reactor now?"
The chief designer looked at the time and said: "It's not six o'clock yet, wait until eight o'clock to start on time."
"Okay." The engineer nodded and immediately turned around and left.
The chief designer then said to Zhang Wenhao and Director Liu: "It takes about 13 hours to start the reactor. This is mainly to prevent thermal shock. The temperature of the reactor must gradually increase. Start the reactor at eight o'clock and wait until evening.
It should be ready around 9 o'clock. This period of time is enough for us to install new propellers. The other 094 will enter the port at noon. The reactor will not be shut down and will be directly replaced with new propellers. By about 12 o'clock in the morning, the two ships
Entering the sea at the same time."
Hoisting the propeller was not a very difficult task, but it took less than two hours to install. At eight o'clock in the morning, the reactor on the new submarine was also started on time. Zhang Wenhao and Officer Liu were scheduled to be at the shipyard at noon.
After having a meal in the canteen, at noon, a 094 nuclear submarine that had just been commissioned entered the port from the water.
094 has been in service for several years, and it is no longer news to Western countries. Western countries already have enough understanding of this type of strategic nuclear submarine. Until now, they have rarely made any effort to monitor and study this submarine.
, so 094 returned to port normally for replenishment, and entered the maintenance and supply dock from the water. Everything seemed normal, but no one knew that this 094 was immediately replaced with another one after entering the port.
Eleven-blade large side-inclination propeller designed and manufactured by Dongchen.
Zhang Wenhao is very interested in nuclear submarines. In fact, he now owns the world's top nuclear submarines, which is all the manufacturing technology of Ohio nuclear submarines. He even masters all the technologies of subsequent generations of Ohio strategic nuclear submarines. Precisely because he has enough knowledge about nuclear submarines.
This understanding made Zhang Wenhao extremely interested in this ghost-like weapon.
Strategic nuclear submarines are the king of all submarines. The only mission of this submarine is to conduct sea-based strategic nuclear strikes. Its strategic and practical significance is far more effective than any kind of nuclear weapon.
In the current satellite era, all land-based nuclear missiles are exposed under the enemy's nose. Once a war breaks out, all land-based launch silos and nuclear force bases will be the enemy's first targets for destruction.
, this is the importance of preemption in the era of nuclear weapons. Once land-based nuclear weapons are completely blocked or even destroyed, the country's reliance on nuclear counterattacks can only come from the sea.
The ocean is vast and mysterious. No matter how powerful the satellite is, it cannot fully monitor the ocean, which accounts for more than 71% of the world's area. And nuclear submarines are ghosts walking in the depths of the ocean. Therefore, it is
It is the most powerful nuclear force in a country. It is also the least easy to destroy and the easiest to retain.
The reason why it is called a strategic nuclear submarine is because its strategic significance is very important. A strategic nuclear submarine carries dozens or even hundreds of nuclear missiles and cruises in the vast ocean. Its one supply is enough to ensure that it can survive
It is this extraordinary endurance that can submerge in the deep sea for 90 days without resurfacing. It ensures that once a high emergency occurs, nuclear submarines can immediately hide in the world's oceans before war. Once war breaks out, nuclear submarines can ignore it.
How powerful is the blow to the homeland, and how devastating is the blow to the enemy in any corner of the world.
With this thing, you have the strength to fight to the death with any country in the world. It is this strategic deterrence that will make your enemies fearful and ensure peace or control the development of war.
The 094 nuclear submarine still cannot pose a sufficient threat to a superpower like the United States. If the 094 makes great progress and is close to or even surpasses the American Ohio-class, then it will be tantamount to placing a time bomb next to the pillow of the Americans. Give
They are enough to intimidate.
Even if there is no war, having this kind of deterrence in hand is a powerful tool to maintain peace.
Not only these builders, but also Zhang Wenhao couldn't help but feel excited during the waiting time. At three o'clock in the afternoon, the refitting of 094 was completed. At nine thirty in the evening, the reactor of the test nuclear submarine was started. Following the water test a month ago,
After the test, it is ready to enter the vast sea again.
In order to grasp the specific data as soon as possible, Zhang Wenhao did not ask to ride on a submarine, but on a high-tech test ship disguised as a maritime surveillance ship. This test ship was actually one of China's best anti-submarine ships.
At 11:30 in the morning, the test ship on which Zhang Wenhao and Officer Liu were riding was the first to leave the harbor and enter the deep sea area. Half an hour after they left the port, the two submarines drove out of the dock at the same time and immediately dived into the water, quietly following the test vessel.
Behind the ship.
In the deep sea area with a depth of more than a thousand meters, the test ship turned off its engine and was almost stationary on the water, just floating up and down with the waves. At this moment, dozens of people were busy in the monitoring room.
The correspondent reported loudly: "Report, 094 is approaching at a speed of 20 knots and is about to enter the towed sonar detection area!"
The commander-in-chief in charge of the entire test said: "Notify 094, maintain the course, enter the site directly at the limit speed, do not pause!"
"yes!"
Keeping the 094 at its maximum speed is basically its ultimate speed. The standard for testing submarine noise is generally the noise in a low-speed stealth state of 5-10 knots. It is impossible for a submarine to move forward at full speed in the enemy detection area.
, because moving forward at full speed, the noise will increase geometrically.
However, the commander-in-chief naturally had his own intentions in doing so.
About twenty minutes later, a staff member responsible for monitoring exclaimed: "The speed of 094 reached 27 knots!"
"Good guy!"
The commander-in-chief was immediately overjoyed and blurted out: "With the new propeller, the maximum speed has been increased from 25 knots to 27 knots?!"
"It's still accelerating slowly!" the monitor said, "It's almost reaching 28 knots!"
Everyone was delighted. The new propeller was replaced without any changes to the entire power system, and the maximum speed was increased by nearly three knots. This meant that the thrust utilization of the new propeller was higher than that of the previous seven-blade propeller.
"Verse 28, there is no room for improvement."
Even at a speed of 28 knots, it was very gratifying. At this time, the submarine had entered and exited the detection range of the test ship. The commander-in-chief blurted out and asked: "What is the noise reading of the detector at the tail of 094?"
"220 decibels."
"Well." the commander-in-chief said excitedly: "The speed has increased by three knots compared to the previous full speed state, but the noise has dropped by 15 decibels. If the speed of 25 knots is maintained, I think the noise can be reduced by at least 5 decibels. This new propeller
The performance is really powerful!”
With that said, he gave another order: "Let 094 turn and re-enter. This time, it must enter in wartime low-speed submersible state!"
This time, 094 reduced its speed to 7 knots. Everyone waited for more than ten minutes before the communication staff said: "094 has entered the monitoring range."
"Sonar!" the commander-in-chief blurted out: "Activate all detection methods to determine the location of 094!"
The staff responsible for sonar detection continued to monitor, but as time passed, half an hour later, the location of 094 was still not determined.
The sonar detection personnel were sweating profusely, but except for them, everyone's face was filled with uncontrollable ecstasy. The sonar still cannot find the location of 094, which proves that the current
094, the stealth of submarine has been greatly improved!
An hour later, the silent scene suddenly heard the excited roar of the communications personnel, saying: "Report! 094 reports, they have appeared and driven out of the monitoring range!"
With a bang, the scene suddenly exploded, and everyone roared with excitement. The sonar testers who had been helpless before were also so excited that they could not control themselves. They knew that they had tried their best, but from the time 094 entered the scene to the time it came out, the entire scene was filled with excitement.
During the process, they did not find any trace of 094! This proves that the silent ability of 094 has surpassed their anti-submarine capabilities! Although China's anti-submarine capabilities are somewhat inferior to those of the United States, Japan, Russia and Germany, 094 can perform like this
, it’s enough to make people excited!
{Piaotian Literature www.piaotian.net thanks all book friends for their support, your support is our biggest motivation}