Chapter 463

Qin Guan sat next to Li Yong and asked Li Yong, "what is the temperature in front of the turbine of our engine?"

Hearing that Qin Guan asked such a professional term, Li Yong answered casually: "1167 degrees Celsius. If you change it to Kelvin temperature, it is 1440 Kelvin. This temperature is not low."

The total turbine temperature refers to the temperature between the gas coming out of the combustion chamber and the front of the turbine. This concept is an important index to measure the power capacity of the engine. The higher the total turbine temperature, the stronger the power capacity of the engine turbine and the lower the fuel consumption rate. However, the total turbine temperature is limited by the turbine blade material, and the temperature cannot be too high, otherwise the turbine blade will melt and deform.

Look at the progress of aircraft engines. Every time, it is accompanied by the increase of this value. Even if the Han state is now transforming turbojet-7, the simplest way is to increase this temperature value.

However, it must not be greatly improved. Without the support of advanced materials, even one degree is dangerous.

Now, Spey's index is the value of a typical second-generation engine. It sounds very high, but listen to the value of the third-generation engine.

Even for the early model of the typical third aunt, the temperature of the al31f is about 1400 degrees, that is, 1673 degrees, while that of the F110 is 1700 degrees, and that of the Taihang is 1750 degrees. However, the abnormal F119 engine of the later Eagle Kingdom has reached such a terrible number as 1950 degrees, while the turbofan-15 developed by the later Han kingdom is said to have reached about 1900 degrees.

(the commonly used temperature is Celsius, and the temperature of ice water mixture is taken as zero degrees. In science, the most commonly used temperature is Kelvin temperature. The lower limit of temperature in the universe is 0 Kelvin, which is 273.)

In order to reach this temperature, the performance of turbine blades must be advanced enough. This material science is also the embodiment of a country's scientific research level. In this regard, Eagle country has been far in the forefront.

Qin Guan provided technology. The single crystal turbine blades produced by Professor Zhang are actually used in Taihang. They can be stabilized at 1750 Kai. Now they are used. It's no problem to easily open two or three hundred Kai.

Now, the turbine temperature of this second-generation Spey engine is only more than 1400 Kai. Qin Guan couldn't help saying, "what if we increase the turbine blade by 200 Kai to more than 1600 Kai?"

Reaching the temperature of 167, that is the front temperature of the turbine of the third generation machine. Hearing Qin Guan's words, Li Yong shook his head: "no, that's impossible. We simply can't have such materials, and Niu Guoren won't provide us with technology. However, if we do, the conservative thrust of our Spey engine can also reach 110 kn."

Directly increasing the turbine front temperature is the fastest way to improve the power. Spey originally pushed it greatly, but its power is not very prominent due to the low turbine front temperature. Now, if the turbine front temperature is greatly increased, the engine thrust will also increase rapidly. Of course, it still needs to be redesigned. After all, the compressor in front is improved, All have to be optimized to adapt to this air flow.

This is a systematic project.

What Qin Guan needs is this big project.

The imitation of Spey is only the first step in the turbofan of domestic engine, and it is also the engine of domestic third-generation engine.

However, Spey is always the foundation of the second-generation engine no matter how it is changed. Its biggest disadvantage is that the high-speed performance at high altitude is poor. At high altitude, the thrust decreases sharply. Therefore, it is not completely suitable for our third-generation engine.

On the premise that the self-developed engine cannot be conquered, the Spey engine is emergency first. After the self-developed engine is successful, it can be used to replace Spey.

In that case, Spey's improvement can cultivate his own engine team, even if he can follow the process of engine modification, he will benefit a lot.

This is also the purpose of Qin Guan.

Now, they are fooled by Professor Zhang's achievements. Relying on Professor Zhang's turbine blades, it's absolutely no problem to drive up to 1700.

At this time, Qin Guan was chatting with Li Yong, waiting for the last ten hours, but he didn't arrive for an hour. There were bursts of footsteps behind him.

"General manager Qin Guan is coming?" Stanley's voice was urgent.

As the chief engineer of Luoluo company, Stanley has been in China long enough. Now, he is here, ostensibly waiting for the 150 hour permanent test run of Spey engine, which shows that Luoluo company attaches importance to this matter. In fact, he is waiting for Qin Guan.

If Qin Guan cannot be found after the test run, Stanley will return to NiuGuo, and it can be accurately judged that his side has been deceived.

Qin Guan said that the advanced single crystal turbine blade was definitely a trick to fool people.

Now, hearing that Qin Guan came, Stanley immediately came with his men.

"Chief engineer Stanley, nice to meet you." Qin Guan said, "the Spey project has witnessed the friendship between us. Now, the first phase of the project is progressing smoothly, and we need your full support in the second phase."

Domestic blanks can only be produced if Niu Guo provides materials. Of course, Qin Guan is not afraid of their tricks now. If they do not provide them, they will develop their own materials. It is not a matter of minutes.

Qin Guan doesn't care whether Niu Guoren will cooperate or not. Qin Guan cares whether Niu Guoren will continue to develop on Spey. After all, learning experience is the most important now.

"Yes, we are also very happy," Stanley said. "Seeing that the Spey engine assembled by you has reached the level of our origin, this is the embodiment of our friendship. Then, general manager Qin Guan, about the turbine blade you mentioned last time..."

"We'll talk about the turbine blade when the test run is over," Qin Guan said. "We have invited Professor Zhang, who is specially responsible for our research and development, to 4430 plant. Just after the test run, he's almost there."

A specially developed professor? Stanley nodded at Qin Guan's words. If Qin Guan said he did it himself, his own side would never believe it. Now, they say it's a special Professor, and it's possible.

So who is it? There are not many scientists in the Han Dynasty, and there are even fewer in materials, Professor Zhang? It seems that there is one in your memory.

Time passed little by little. After a long wait, finally, the time came. The 150 hour continuous test run, the Spey engine made in Han country, withstood the test!

Suddenly, everyone cheered and succeeded!