Chapter 1455: New plan (8)

Cai Qigong carefully opened a safe, and took out a small metal blade like a treasure. The blade was silver-white, slightly larger than a palm, and had many small holes on it. It was light in his hand, but Tan Zhenhua took it. When it was, his hand trembled involuntarily, as if it was an invaluable treasure.
He knew that the small metal blade in his hand was dozens of times as heavy as gold in terms of the actual resources needed to make it, and the most important thing is that even if you are willing to pay so much money, In this world, no one will sell it to you.
Because this is a high-temperature turbine blade, to be precise, this is the second-generation single crystal superalloy turbine blade developed by Huaxia!
Military fans who are concerned about China Aviation Development’s business should all know that an aero engine is a precision machine that is extremely difficult to design and manufacture. In this machine, the most difficult but most important thing is the so-called "hot end". The three big pieces" are the combustion chamber, the turbine, and the exhaust nozzle. The turbine is the most difficult and expensive part of these three pieces-because hundreds of these super-golden turbine blades are installed on it.
A complete modern turbofan engine with a price of millions or even more than ten million US dollars, the blades including fan blades, compressor blades, and turbine blades account for 30% of its total cost, and this is 30% , The turbine blades working on the hot end account for 60% of the total value of the blades, which shows the high value of this thing.
As mentioned earlier, China has made a short lead in the world in a single component of turbine blades. It was in the 1960s when Shi Changxu led a team and produced the second 9-hole molding in the world. High-temperature casting alloy hollow blades, this achievement even leads the aviation development leader Luo. Luo spent 8 years, and let Sir Hook, who led the team to sell in China, be amazed.
We must know that the "Speey" engine introduced by China Xia later failed to use this technology. It still used solid high-temperature directional solidification alloys. The technology for processing this blade is also the "no margin" that Xihangfa spent great efforts to successfully tackle the problem. Precision forging".
So what are the specific benefits of this turbine blade upgrade?
The benefits are too great!
Let’s illustrate with a not-so-accurate data—for every 50 degrees Celsius increase in the temperature in front of the aero engine’s turbine, the engine’s power can increase by 10%.
As we all know, the most intuitive data to see whether an aviation engine is powerful or technologically advanced is its thrust-to-weight ratio, that is, the ratio of the thrust that it can explode to its own weight.
Understand? In order to obtain as much thrust as possible without increasing or less increasing the weight of the engine itself, the most direct way is to increase the engine's front turbine temperature.
Take the "Speey MK202" that students are most familiar with as an example. This engine developed in the 1960s is a typical second-generation jet aero engine and first-generation turbofan engine. It uses solid high-temperature directional solidification alloys. For turbine blades, the temperature before the turbine is 1300~1500K (K-273 is both degrees Celsius), so its thrust-to-weight ratio barely exceeds 5.
In its upgraded version of China’s "Qinling" engine, due to the adoption of some new technologies, especially the replacement of China’s domestic first-generation single-crystal superalloy turbine blade DD3 and the redesigned and manufactured turbine disc with powder metallurgy technology After that, the temperature in front of the turbine increased to 1380~1580K, and the thrust of the engine was successfully increased by about 10%, breaking the 10-ton threshold, and the thrust-to-weight ratio reached 5.7.
Look at the Americans again.
Midi first produced the first generation of single-crystal superalloy gas film-cooled hollow turbine blades PWA1480 in the 1970s. The first to adopt this blade was the F100-PW-220 engine, which increased the engine's front turbine temperature to 1680~ At 1750K, the thrust-to-weight ratio also exceeded 7 in one fell swoop, and even exceeded 8 after the improvement. Starting with this type of engine, the aviation development developed by the United States entered the third generation.
After that, the Americans and Europeans successively completed the second-generation single-crystal superalloy composite cooling hollow turbine blades from the 1990s to the beginning of the 21st century. The temperature in front of the aero-engine turbine was also increased to 1850~1980K, thus the birth of the company. Compared with the aero engine up to 9-10, the result of the Americans is the F119 installed on the F-22, and the result of the Europeans is the EJ-200 engine installed on the Typhoon fighter. These two engines It is also a representative product of the fourth-generation aero engine of the international standard.
It can be seen that every time the engine is replaced, the turbine blades are replaced, and the temperature in front of the turbine is getting higher and higher.
DD3 is the first generation of nickel-based single crystal superalloy gas film-cooled hollow turbine blades successfully developed by Huaxia. This project has nothing to do with Tan Zhenhua at the beginning. It was established as early as the late 1970s, but it was finally completed in 1987. After working in the laboratory, the performance is roughly equivalent to the PWA1480 that the Americans completed in the 1970s. However, in Tan Zhenhua’s previous life, this achievement will actually go from the laboratory to mass production after 1990, and in the entire 90s it can only I got a little application on an engine model "Turbojet 14" that Tan Zhenhua could not understand the purpose of his research and development. To tell the truth, he couldn't help asking Minister Mo several times. In 1984, he had to set up a project to develop a brand new one. What does the Aviation Department think about turbojet engines?
In fact, he knows the answer. It is nothing more than the limited scientific research funding of each unit. "Turbojet 14", that is the subject of "Pro son" 3606...
Tan Zhenhua didn't have the time to mix that up. Isn't it just project funding? The Second Young Master’s wallet is bulging, and the 3624 Institute has been cooperating very well. Therefore, the "high-precision pre-research" and the "turbofan 12" that will be developed on the basis of this topic in the future will never be abandoned halfway. You do your own " Turbojet 14", let's do our "advanced push", don't cry when you hand in your homework!
There is also "Turbo Fan 10", hehe, be careful, Master, I'm going to do it, right? It doesn't matter if Maozi refuses to sell "Three Uncles", but Master, can you not think of the things that I am worried about?
Pulling a long way, back to the turbine blades-as soon as DD3 was produced, Tan Zhenhua joined with Xihang Development and Gas Turbine Institute to find Cai Qigong at the first time, and several companies jointly solved many processes at the fastest speed. It was difficult and put into mass production, and the replacement tests on the engines of "Qinling" and "Huashan" were successively completed. While commercializing the research results, Tan Zhenhua also naturally proposed the development of next-generation turbine blades. The subject, the performance requirements are also very clear-to achieve the same performance as the U.S. second generation high temperature turbine blade PWA1484, and the temperature before the turbine reaches 1750K.
Obviously, putting forward such a request shows that Tan Zhenhua is no longer satisfied with all kinds of magical changes on the "Speey". This engine developed in the 1960s is about to run out, and a new one is imperative. In fact, everyone knows that the 3624 central launch is now driven by Tan Zhenhua’s investment, and he is already negotiating with the Ministry of Aviation on the property rights of this engine.
With the participation of this little gold master, the development of the second-generation nickel-based single crystal superalloy composite cooling hollow turbine blade DD6 can be regarded as rapid progress. In only 4 years, the laboratory results have been completed, which is what Tan Zhenhua currently holds. Of this one.
"We are currently developing the mass production process. According to the current progress, we expect to complete the development and formulation of all the preparation processes within 18 months." Cai Qigong said with a smile: "Mr. Tan, don't forget the bonus you promised. !"