Chapter 324

How can the Niu people cooperate?

This is a question that Qin Guan has been considering recently. To put it directly, it is definitely a lion's big mouth. Therefore, we must think of an excuse.

Xiaolong, of course, is a bait. The most important thing is for your side to take the initiative.

Niu Guoren, don't you want to improve Spey? Of course not. They must also have demand. For example, the male cat fighter of Eagle country is looking forward to a new engine.

In this era, although Eagle developed advanced F100 series engines, their reliability was so poor that their F-15 aircraft became the queen of hangar.

At this time, if Spey has enough power, he may get an order.

NiuGuo's new engines are all medium push. Only Spey can barely be regarded as a big push.

We took Niu Guoren to improve together. Niu Guoren has been familiar with this Spey for a long time, and our own personnel can just learn the engine development experience in the process of improvement, which is of great benefit to our own growth.

Hearing Qin Guan's proposal, Stanley's eyes lit up. These Han people have a great appetite. Spey's technology has not been fully understood, but he wants to improve it?

Just right, this is also an opportunity. It's depressing enough to think about it. Originally, he had just gained an advantage from his momentum and forced the Han people to take the super seven for research. However, his Highness Prince suddenly came, so his side had to behave like a gentleman and can't humiliate the royal family.

Now, we can finally continue to complete the task.

Stanley became interested. "How are you going to improve?"

"The new fan and low-pressure compressor are adopted, the original 5-stage fan is changed into 3-stage fan and 2-stage low-pressure compressor, the fan diameter is increased from 826mm to 950mm, the air flow and pressure ratio are increased, the inlet guide vane is cancelled, the high-pressure compressor is changed from 12 to 11, and the installation angle of turbine guide vane and rotor vane is modified to increase the engine through these methods The thrust reaches the level of 11 tons. "

If these words came from Mr. Wu's mouth, it would be acceptable. After all, Mr. Wu is an engine development expert, but now it comes from Qin Guan's mouth. A series of professional data. The most terrible thing is that these improvement measures are actually planned by Luoluo company.

RORO actually has a plan to increase the power of Spey to 11.5 tons, but in later generations, this plan has been delayed until 82 years. As a result, the xg-40 project was launched. Compared with improving an old Spey, RORO is no longer interested.

In history, the state of Han actually proposed to improve Spey, but the plan ended in nothing. The state of Han couldn't even copy the original Spey. Where can we improve Spey?

But now, several years ahead of schedule, Qin Guan's proposal is still attractive.

Well, if you want to improve Spey's motivation, it's not in the original agreement, is it? Is it always possible for us to propose additional agreements?

Stanley suddenly remembered a question. Up to now, the meeting has been half a day, and his purpose has not been put forward.

Damn it, the Qin Guan in front of him is like a special negotiator!

What about your super seven? If we are not allowed to study, we will never agree with this plan. At the same time, how much money are you going to spend on it? The development of an engine costs money. If you take out another 30 million Eagle yuan, it may not be enough.

However, he still had no chance to speak.

Because Qin Guan was talking again: "at the same time, in the rearmost combustion chamber, we also want to increase the turbine temperature by about one Baidu, so that the engine thrust can be increased by another 10%, reaching a thrust of 12 tons, and officially enter the ranks of high thrust engines."

The principle of an aeroengine is very simple. In front of it is a large fan, which is scientifically called a compressor. When the wind is blown into the combustion chamber behind it, the fuel injection burns and becomes a gas with high temperature and high pressure.

These gases do not come out directly. First push the turbine blades behind them. In fact, they are like a windmill, and then come out.

Why is there such a thing in the back? Because it will drive the compressor in front to rotate!

The turbine blade is blown by high-temperature and high-pressure gas. The higher the temperature it can withstand, the greater the thrust of the engine.

At the beginning, when the jet engine just came out, the turbine temperature was only a few hundred degrees. After more than half a century of development, the temperature bearing capacity of cast turbine blades increased from about 750 ℃ in the 1940s to about 1700 ℃ in the 1990s, and the thrust of the engine also changed dramatically.

Of course, this great achievement is the common contribution made by the common development of blade alloy, casting process, blade design and processing and surface coating.

Of course, it was not easy. In that year, during the Great Leap Forward period, the engine factory only increased the turbine temperature of turbojet-7 engine by more than ten degrees. As a result, a series of mechanical faults followed one after another and could not be overcome at all.

The aeroengine is the crown of the whole country's Industrial Science and technology, and the turbine blade is the brightest night pearl on the crown. Ordinary countries can't play at all. There is no R & D system and no industrial accumulation. How can it be!

However, as long as there is a breakthrough, the thrust of the engine will certainly soar sharply. This is the most direct and rude scheme.

Hearing Qin Guan's words, Stanley couldn't help talking. He could really make a fool of himself. Do you think the turbine temperature is going to increase if you want to? How much will this involve?

"Mr. Qin Guan, is there any basis for you to say so?" Stanley continued to make himself behave more elegant. Well, it's a waste of time to mention professional content with a layman.

"Of course, we have developed a directional single crystal hollow blade without allowance in China, which can withstand about 1700 temperatures." Qin Guan said: "let me explain to you that this directional single crystal is the arrangement of internal molecules..."

"Wait, you don't have to explain to me. You said you already have single crystal air cooling blades?"

Turbine blade, to withstand high temperature, we should try to cool it? How? The simplest thing is to make it hollow. Blow cold air inside to cool it.

With this cooling technology alone, the turbine can improve its temperature resistance by tens of degrees. However, if it is made hollow, its mechanical strength needs to be quite high. Only the internal molecular ordering rule, that is, the forming of single crystal, can be used.

This technology is not even mastered by NiuGuo. Are the Han people bragging?

"Of course, how could our super-7 fighter have such high mobility?" Qin Guan asked.