Unlike the slightly twisted strip-shaped fan-shaped ordinary blades that Liang Yuan usually sees, the distortion angle of the first-level fan blade of the gas turbine is very large. Most of the blade planes can be seen from the facade of the blade root to the tip of the blade. Compared with the original fan blade, it can be twisted by at least 30 degrees more than the original fan blade.

Due to the increase in the distortion angle, the part of the new blade reflects much more light than the original fan-shaped blade. Under the mapping of the workshop ceiling light, the blade edge of the first-level fan of the gas turbine looks like a sharp edge of the sharp weapon. As long as the visual angle is slightly off, the entire fan looks like a strange S-shaped line.

Starting from the distal end of the fan blade, at least one-half of the length is twisted and obviously swept back to the inside of the intake duct at a certain angle, making the entire gas turbine feel like it is rushing forward. From the appearance, it is much more powerful than the original appearance.

For guys like Liang Yuan who often flew around the sky in his previous lives, the shape of this fan is really familiar. It is simply Airbus and Boeing. It only began to be equipped with a new generation of aircraft engines with high flow, small aspect ratio and sweeping fans in the late 1990s.

Since the mid-1990s, with the rapid development of the computer industry, some aero engine improvement ideas proposed in the early years have gradually become within reach, among which the small aspect ratio and swept blade technology are the most eye-catching ones.

In the era of information explosion, when countless aviation experts and professors mentioned the future technological improvement direction of aircraft engines, small aspect ratio and swept blade technology are all topics that must be mentioned.

Small aspect ratio and swept blade technology not only make the engine blades stronger. It has better aerodynamic stability, but also reduces the compressor stages of second-generation aircraft engines such as SBE from 12 to 13 to 8 to 9.

With the decrease of compressor stages, not only the weight of the aircraft engine is greatly reduced, the thrust-weight ratio is increased, but the reduction of related components has a very positive impact on the reduction of manufacturing costs, maintenance strength, failure rate, etc.

The intake fan blades swept back at a certain angle, which can obtain the same engine inlet flow at a lower fan speed. The swept back blades are very advantageous in simplifying the structure of the aircraft engine, reducing aerodynamic characteristics and reducing noise.

At the same time, bending the inherent structure of the leading edge swept back fan blades can make external objects thrown into the fan's outer duct through the centrifugal action of the fan blades, preventing them from entering the low-pressure compressor. It enhances the aircraft engine's ability to resist external objects damage.

The United States began to use small aspect ratio and swept blade technology around 2000 to improve the third-generation military engine models, such as General Electric's f110ge132 and f414ge400, all use small aspect ratio and swept blades to improve the performance of the engine.

Liang Yuan was completely stupid when he saw this familiar fan, which was completely impossible. You should know that before the computer performance was improved to a certain extent, the complex surface design of the sweeping fan should be described in astronomical units.

In the 1940s and 1950s, when electronic computer technology was just in its infancy, the data calculation of the non-viscosal flow field around it was calculated from 1943 until 1947. It took five years for humans to solve the law of the fluid force field around the cone during supersonic flight, thus breaking through the shackles of supersonic flight.

The saying that mathematics is the mother of all sciences is not nonsense. Without careful and detailed massive operations as the basis, any applied science and advanced technology are all mirages and buildings in the sky.

The calculation difficulty of the surface flow field of the small aspect ratio and the swept blade is at least 100 times that of the surface flow field of the simple cone. In addition, the linkage effect of multi-stage low and high-pressure compressors behind the first-stage fan is an impossible task for the current electronic computer performance of the technology park. After all, computer fluid mechanics (CFD) has truly developed leapfrogly, but it is after the computer's computing speed has exceeded 10 billion times per second.

In the era when various cfd software were popular in later generations, the minimum hardware requirement for installing various cfd software was 24g memory, dual-core or quad-core cup. If installed on a single-core computer with a chip computing power of less than 10 billion per second, the entire set of cfd software would probably be stuck.

The two little girls looked at Liang Yuan with a stunned look, and proudly poked Liang Yuan a few times, and said, "Aunt Liang is so awesome, Xiaoyuan is so stupid."

Through a period of hard study, Li Yuanling's scientific research work has formed a very simple and straightforward understanding in the eyes of the two lolitas. The greater the difference between the fan blades studied by Li Yuanling and the ordinary fan blades, the more powerful it is, the more powerful it is for this fan. Of course, Aunt Liang, who has developed this fan.

Liang Yuan, who had heard the summary of the two little girls, thought speechlessly for a long time, and had to admit that the simple scientific view of the two loli really conforms to the true development laws of the turbofan engine.

Liang Yuan, who was stabbed by two little girls a few times, came to his senses. Looking at the gas turbine in front of him with metallic light, he still felt like he was in a dream. Could it be that his mother was dreamed by Einstein? However, even if he found the empirical calculation formula and related constant of the swept blades, the real calculation amount involved in this design is enough for more than 100 people in the gas engine laboratory to calculate for fifty or sixty years.

If Liang Yuan decides to act cute and get into condom, he will see what is going on.

"Mom, that fan looks very qiguài, why are the leaves bent inside? I have never seen them in the air conditioning fan or the bladeless electric fan." Liang Yuan waved his palm and made the shape of a hook.

"Mom actually hid all the good things and didn't give them to me." Liang Yuan said with his eyes.

Li Yuanling reached out and held Liang Yuan's ear and twisted it, and said with a laugh and cry: "Where is there any good thing hidden?"

"Although the prospect of the sweeping blade is very good, it is almost the same thing as it is now. It is what my mother plans to deal with the British in a few days."

Li Yuanling had some headaches, as should explain to Liang Yuan, the small strings, the large pile of boring scientific data and attractive prospects of the sweeping blades.

However, after hearing Li Yuanling's words, Liang Yuan immediately understood the mystery. After all, the gas turbine in the gas engine laboratory is a pure Rolls-Royce Sm1a carrier-based gas turbine. If the original designer does not change it, he may be exposed on the spot.

Since Liang Yuan plans to continue to introduce turboshaft engines on Luoluo, it is better to do less damage to his image.

Li Yuanling grabbed Liang Yuan's ear and patiently briefly explained the advantages and technical difficulties of the new blades.

He nodded as if he was wise and ignorant, Liang Yuan asked, "Didn't my mother say that she would talk to Luo Luo and introduce equipment and technology just by talking to him? Mom loaded the goods on the gas turbine. If the British don't let the British see our technological level, what should those guys do if they ask for a price all over the place?"

"Although the new fan is a good product, it does not mean that this gas turbine cannot work." Li Yuanling smiled happily.

"Xiaoyuan still remembers what my mother told you about the mathematical model of sweeping fans that my mother has already established initially?" Li Yuanling asked.

Liang Yuan frowned slightly and thought for a while, and suddenly said, "Mom, you replaced some uncertain variables in the formula with verified constants. That is to say, this fan can only work under a fixed revolution and there is no room for adjustment. However, by modifying the starting revolution of the fuel engine, you can directly bring the entire fuel system to the working interval of the sweeping fan and then start it up."

"This way, it can completely make the people who don't know the truth have some illusion that we have made a major breakthrough in the technology of blade sweeping. Who came up with this idea is simply too bad." Liang Yuan couldn't help laughing after speaking.

According to some historical records in previous lives, whether Britain and the United States decided to conduct real practical research on small string ratios and grazing blades, they would not be earlier than 1987. With the current limited computing power, it is impossible to achieve any major results. If the progress is not smooth, it may not even be possible to find the rules of the preliminary mathematical model.

It is completely imagined how surprised and shocked it would be when the representatives of Luoluo-Royce visited China discovered that this gas turbine was actually using a gas intake fan composed of small aspect ratio and swept blades. Just guessing how the gas engine laboratory solved the problem of astronomical unit calculations was enough Luoluo racked his brains to break his head.

"I knew that your mind was not used in the right place. You reacted quickly enough in this kind of thing." Li Yuanling said with a smile.

Li Yuanling's trick is consistent with the fact that Mr. Wu was released from the bullpen when he introduced Sbet, and he was hitting Luo Luo's confidence at the negotiating table.

Liang Yuan smiled, quickly changed the subject and asked, "Mom, I see that the curves of those sweeping blades are very complicated. How did the laboratory process them?"

"First use precision forging equipment forging and then hand-made it with the fitter. A total of 28 blades Lu Hengsheng seconded 28 level 8 fitters from the Municipal Industrial Bureau. It took him half a month to process it." Li Yuanling said with some emotion.

Liang Yuan was shocked after hearing this. This was when he changed his place in Shengjing City, which is known as the eldest son of the Republic's industry, where could he find so many top fitters?

"The gas engine laboratory is basically ready, just waiting for the Luoluo industry and trade group to come to Shengjing." Li Yuanling said. (To be continued.)
Chapter completed!