In fact, Yang Hui can also understand the reason why Chief Engineer Yu said this, how difficult it is to imitate the core machine, which can be seen from the difficult road of the previous Taihang engine, the reason why he still has to come to the 420 factory this time, is for the last glimmer of hope.

However, this kind of industrial design has never been sloppy, nor has there been any shortcuts, and the imitation of the FT-8 gas turbine seems to be completely hopeless.

Yang Hui, who was full of decadence, set his eyes on the old director again, and he could also see the helplessness in the eyes of the old director, entering the marine gas turbine market is the established strategy of United Aero Engine Company, but now the journey is long......

"It seems that we can only think of another way, and it just so happens that I have a relationship with the Ukrainian side, which is the essence of the gas turbine industry in the entire Soviet Union, and they have an engine of the same level as the FT-8, which needs to be paid attention to in the future."

It's just a faint sentence, and for the GT25000 gas turbine project, I'm afraid you really have to get it back, and you really can't do without it.

Hearing Yang Hui say that he wanted to go to Ukraine to fight the idea of the Soviet gas turbine, the old director seemed to have an understanding, given that he had already had the experience of getting two engines from Ukraine, and now he said that he was going to build another gas turbine, which sounds a little possible.

Just as he was about to nod his head to approve the feasibility of Yang Hui's plan, Chief Master Wu on the side frowned, and he himself did say that the localization of the FT-8 gas turbine was not very reliable.

However, if it is said that Southwest Science and Industry has entered the industrial/marine gas turbine market, it is not necessary to use a 28-megawatt gas turbine like FT-8, because the big guy has the benefits of the big guy. But when you don't have a big guy to use, you may have another surprise in retreat.

As the chief technical engineer of the 420 factory. Now it is back in the combustion turbine industry, taking into account the specific situation in China. He already has his own ideas, and this is definitely the most suitable solution for the specific situation in the country, and it is also the most sustainable project.

Because of the plan based on the specific situation in China, he must oppose Yang Hui's proposal to get a foreign product from Ukraine, and now the 420 factory and even the entire United Aero Engine Company, and even the Republic can support the research and development of a military gas turbine.

At this time, it is necessary to put forward your own ideas and plans in order to win the greatest support.

"No, no, we don't necessarily need an engine like an FT-8 gas turbine right now. His power far exceeds the American-made LM2500 gas turbine used on our 052 ship, and the LM2500 gas turbine used in the diesel-fired hybrid system used in 052 has a power of 20 megawatts, and you must know that this FT-8 is a 28 megawatt engine. ”

When Yang Hui heard this, he still didn't see what Chief Master Wu was going to say very clearly, and it was true that the first improved power of the LM2500 gas turbine used in 052A was only 20 megawatts, while the FT-8 reached 28 megawatts, and there was a huge surplus of power in the middle.

But Yang Hui is aware of the future development route of the Navy, from the 052A to the 5000-ton displacement. It has developed to 052b/c/d up to 6000, and even the latest model has reached a displacement of 7000.

This is not due to the 20 MW engine of the early LM2500, but the 26 MW of the GT25000 gas turbine that was introduced.

Officially because there is such a power system. The follow-up model of 052 can increase the tonnage, and then calmly install the four-sided phased array shield, and develop the famous Chinese Aegis ship.

This is the right way to go. A GT25000 engine is a must.

"What does Chief Master Wu mean is that we use gas turbines of the FT-8 level with some excess power? But I don't think that's right. If our 052 class uses FT-8, the full displacement tonnage may reach 7,000 tons. Such a destroyer will be able to meet the needs of regional air defense. ”

In fact, as Yang Hui said, if the 052 class wants to pass the 7,000-ton full discharge threshold, it must have at least a total of 56 megawatts of total gas turbine power, and only such a design can meet the requirements.

"I know that the Navy does have a plan to design the tonnage of 052 to a full load displacement of 7,000 tons, and it also requires a speed of 30 knots. It is true that the installation of two FT-8 gas turbines can meet the requirements of use, but the world's most common destroyer power system has never been a two-gas turbine scheme, and the safest and most efficient configuration is four power systems arranged in two groups. ”

At this point, Yang Hui finally understood what Chief Wu was thinking, to make four gas turbines reach 56 megawatts, then only four 14 megawatt gas turbines are needed to do it, and the requirements are lower, and four 13 megawatt engines can also do.

And this level of gas turbine, the Republic should be most familiar with the turbofan 9 to start the aviation refueling plan, this program in the turbofan 9's hometown Rolls-Royce company has also been specifically implemented, Rolls-Royce Sm1 series gas turbine is such a storage zài.

The development of the SM1 series of gas turbines began in 77 and was licensed to Japan in 81, and similarly, in 80 years there was also an intention to license it to the Republic, but it was later disrupted by the LM2500.

The entire SM1 gas turbine ranges from 13 MW to 16 MW, with a total of three ABC models, and the engine is used on the British 23-class, Japan's Yu-class and Akizuki-class general-purpose destroyers.

Generally speaking, the SM1 series gas turbine is a very ideal power system for 5000-7000 ton warships, if the previous Republic of China refueled the turbofan 9 voyage to continue, then the power system of the previous 052 class can also have another scheme.

It is not possible for the 052B/C/D model to use two GT25000 gas turbines as the main force of maximum output, but for the usual cruising use, two medium-speed diesel engines have to be installed for the usual cruising work.

(PS: The disadvantage of gas turbines is that the adjustability range of output power is very low, which cannot take into account the needs of low-speed cruise, which is also the reason why the use of two high-power gas turbines as the power system is not very popular)

In many cases, after the use of large gas turbines, it is necessary to be equipped with another set of low-power cruise engines, and the early Olympus gas turbines in Britain were equipped with a set of Tenin low-power gas turbines.

Japan's Yucun village uses LM2500 as the high-power main engine and SM1 as the cruise engine, and these two different types of gas turbines together form a power system, which is called the combined power scheme.

Similarly, there is a joint plan for combustion and fueling, and there is a joint program for diesel fueling, which as the name suggests, uses a high-power gas turbine as the main engine for high-speed navigation and a diesel engine as the main engine for cruising.

Only by adopting the above design can the early use of gas turbine-powered warship power systems be more economical, can be more fuel-efficient, and achieve longer cruising time.

However, there are also disadvantages to the alternating cruising scheme: because of the different speeds of the two different types of gas turbines, when the maximum thrust is required for cruising, there will be a large power loss when the engine is working in parallel.

For example, the book rain village,The LM2500 engine used is 21,500 horsepower,SM1 is 13,500 horsepower,A total of four engines add up to 70,000 horsepower,But the two types of four engines in the rain village level are only 60,000 horsepower,The power of 10,000 horsepower lost in the middle is very heart-wrenching,The pain even the Japanese can't stand it,In the later Autumn Moon class, it was decisively changed to four SM-1 gas turbines of the full-combustion east power system。 (To be continued.) )