Liang Yuan hey hey smiled and jumped on the test bench. Two little girls walked past.
Two girls are staring curiously at the gas turbine inlet with big black eyes.
"What is Jiajia looking at?" Liang Yuan asked as he walked.
"Xiaoyuan, come and see Liang Yixin. This thing looks good. qiguai?" Ningwanjia waved to Liang Yuanzhao.
Liang Yuan walked a few steps to the front of the gas turbine and looked at it and froze to be continued.
Chapter 116 Advance pit
Unlike ordinary blades with slightly twisted bar-shaped fan ribs as seen by Liang Yuanping, the first-stage fan blades of gas turbine have a very large twist angle. From the vertical surface of the blade root to the tip of the blade, it can be seen that most blade planes are twisted by 30 to 40 degrees less than the original fan blades.
Due to the increase of twist angle, the new blade reflects more light than the original fan-shaped blade, and the roof light maps. The blade edge of the first-stage fan of gas turbine looks like a sharp weapon. The visual angle of the blade is slightly off, and the whole fan looks like it is bent into a weird S-shaped line.
From the far end of the fan blade, there is at least one-half length twist, and at the same time, it is obviously swept back to the inlet passage at a certain angle, which makes the whole gas turbine feel that it is struggling forward, and it is much more powerful than the original one from the outside.
For Liang Yuan, a guy who used to fly around in his previous life, this kind of fan shape is really familiar. The root is that Boeing and Boeing were equipped with a new generation of aero-engines with high flow, small aspect ratio and swept fans in the late 1990s.
Since the mid-1990s, with the rapid development of the computer industry, some ideas for improving the early sailing motivation have gradually become within reach, and the technology of small and medium aspect ratio and swept blade is the most striking one.
In the era of information explosion, small aspect ratio and swept blade technology are all topics that must be discussed when experts in digital navigation teach the future technical improvement direction of aero-engine.
The technology of small aspect ratio and swept blade makes the blades of the engine stronger and has better aerodynamic stability, and at the same time, it can reduce the number of compressor stages of the second-generation aircraft from 12 to 13 to 9.
With the reduction of compressor stages, not only the weight of aero-engine is greatly reduced, but also the reduction of high-phase components with thrust-to-weight ratio has a very positive impact on the reduction of manufacturing cost, maintenance strength and failure rate
However, the blades of the intake fan are swept back at a certain angle, which can obtain the same inflow rate of the engine compared with the fan rotation. The swept-back blades have great advantages in simplifying the structure of the aero-engine, improving aerodynamic characteristics and reducing noise
At the same time, the inherent structure of the curved leading edge swept fan blade can make foreign objects be thrown into the fan external duct through the centrifugal force of the fan blade to prevent them from entering the low-pressure compressor, which enhances the ability of the aircraft engine to resist foreign object damage.
In about two years, the United States has brought the technology of small aspect ratio and swept blades to the third generation of improved military motor models, such as ventilation f11ge132 and f414ge4, and all of them adopt small aspect ratio and swept blades to improve the motor performance.
It is impossible for Liang Yuan to see that this familiarity is completely stupid than the fan. It is necessary to know that before the computer performance reaches a certain level, the calculation amount and machining difficulty involved in the design of complex surfaces of small aspect ratio and swept fans should be in astronomical units.
Computer technology has just sprouted in the forties and fifties, and the calculation of the data of the viscous flow field around the cone during the sound flight has been calculated from 1943 to 1947. It took five years for human beings to solve the law of the fluid force field around the cone during the sound flight, thus breaking through the shackles of sound flight.
Mathematics is the mother of all sciences. This sentence is not nonsense. Without careful and detailed massive calculation as the foundation, what should be scientific and advanced technology is a mirage.
However, the small aspect ratio and less difficulty in calculating the flow field on the surface of swept blades are the linkage effects of the flow field on the surface of a simple cone and the multi-stage low-pressure and high-pressure compressors behind the first-stage fan, which is impossible for the computer performance of the existing science and technology parks. After all, the computer fluid dynamics (fd) has really developed by leaps and bounds or the computer operation has exceeded 100 million times per second.
In the era when all kinds of fd software were installed in the future, the minimum hardware requirement was 24g dual-core or quad-core up. If the chip computing power was 10 billion/second, the whole set of fd software for single-core brain would be stuck.
Two little girls looked at Liang Yuan with a stunned look and proudly poked Liang Yuan and said, "Liang Yi is amazing, isn’t it? Xiaoyuan looks silly?"
After studying hard for a period of time, Li Yuanling, a scientific researcher, formed a very simple and straightforward cognition in her eyes, that is, the greater the difference between Li Yuanling’s research on fan blades and ordinary fan blades means that the more powerful this fan is, of course, the more powerful it is to develop this fan.
After listening to two little girls summarizing Liang Yuanyu’s thoughts for a long time, I have to admit that the simple scientific view of the two girls really conforms to the law of turbofan motivation real exhibition.
After being stabbed by two little girls for a few times, Liang Yuancai came to her senses and looked at this gas turbine with metallic light in front of her eyes. I still felt that my mother was dreaming by Einstein, but even if I found the small chord ratio, the empirical calculation formula of swept blades and the phase constant, the real calculation involved in this design was enough for more than 100 people in the gas turbine laboratory to calculate for 50 or 60 years.
Liang Yuan decided to sell Meng to cover Li Yuanling’s words and see what was going on.
"Mom, that fan looks very qiguai. What blades are bent inward? I haven’t seen the adjustable fan and the leaf fan." Liang Yuan waved his palm to make a hook shape.
"Mom actually hid all the good things from me," Liang Yuankaba said with his eyes open.
Li Yuanling stretched out his hand and carried Liang Yuan’s ear and twisted it in distress situation and said, "Where are the good things hidden?"
"Although the prospect of the swept blade is very good, it is almost a sample now, and that is what my mother is going to deal with the British in a few days."
Li Yuanling has a headache, so she should explain to Liang Yuan a lot of boring scientific data and attractive prospects about small chord aspect ratio and swept blades.
However, Liang Yuan understood the mystery after listening to Li Yuanling’s speech. After all, this gas turbine in the current gas turbine laboratory is pure, and the original designer will be exposed on the spot if he doesn’t change it into a disguise.
Since Liang Yuan intends to continue the introduction of vortex shaft motivation by Rollo, it is better to do less to damage his own image.
Li Yuanling grabbed Liang Yuan’s ear and patiently explained the advantages and technical difficulties of the new blade.
Pretending to understand or not, Liang Yuan nodded and asked, "Didn’t mom say that she would introduce equipment and technical problems if she had a good talk with Rollo? What if mom put that kind of goods on a gas turbine and those guys don’t let the British see our technological level?"
"Just because the new fan is a sample doesn’t mean that this gas turbine can’t work." Li Yuanling laughed.
"Xiaoyuan, do you still remember that mom told you that the mathematical model of the over-swept fan has been initially established?" Li Yuanling asked.
Liang Yuan frowned slightly and thought for a while, then suddenly realized, "Mom, you have replaced some uncertain variables in the formula with constants, that is to say, this fan can work at a fixed number of revolutions, and there is no room for adjustment. However, by modifying the number of revolutions of the gas turbine starter, the whole gas turbine system can be directly brought to the swept fan work area and then refueled."
"This can make the untrue people have some illusion that we have made a major breakthrough in swept blade technology. Mom, who came up with this idea is simply too bad." Liang Yuan couldn’t help laughing at the back.
According to some historical documents of past lives, Britain and the United States decided that the real research on small chord aspect ratio and swept blades would not be earlier than 1997. At present, with limited computing power of computers, it is impossible to achieve any great results. If the progress is not smooth, perhaps even the preliminary mathematical model has not touched the law.
It is conceivable that when the representatives of Rolls-Royce Company visited China, they were surprised and shocked when the running gas turbine was actually composed of small aspect ratio and swept blades. It was enough for Rolls-Royce to rack his brains to think about how to solve the problem of astronomical unit calculation in the gas turbine laboratory.
"I knew you didn’t even get to the right place. You reacted quickly enough," Li Yuanling said with a smile.
Li Yuanling’s move comes down in one continuous line with the fact that Wu had just been released from the bullpen when Speer was introduced, which hit Rollo’s confidence at the negotiating table.
Liang Yuan smiled and quickly changed the subject and asked, "Mom, I think those swept blade surfaces are very complicated. How did the laboratory process them?"
"First, the precision forging equipment was forged and then the fitter master was asked to make a total of two blades by hand. Lu Hengsheng seconded two locksmiths from the Municipal Industry Bureau and it took more than half a month to process them." Li Yuanling said with some regrets
Liang Yuan was shocked when he heard this, which means that Shengjing, the industrial minister of the reputed Republic, can find so many top fitters in another place.
"The bases here in the gas turbine laboratory are all ready, just waiting for the Luoluo Industry and Trade Group to come to Shengjing." Li Yuanling said to be continued.
Chapter 117 The only future of gas turbine laboratory
Liang Yuan and Li Yuanling talked. Ning Wanjia went back to the test bench after watching the gas turbine. Listening to Li Yuanling talking about the gas turbine can keep running at one revolution, the little girl was curious and asked, "What will happen if Aunt Liang changes the fan revolution?"
"The consequence is very bad. When this gas turbine in the laboratory is running at power, the air intake of the unit is more than 6 kilograms per second."
Looking at Liang Yuan and Ning Wanjia, Li Yuanling laughed and said, "Is the number ganjia not as good as shie’s mother?" "!"
"The living room area at home is close to 2 square meters, and the height from floor to ceiling is about 27 meters. All the gas products in the whole room should be 5 cubic meters, and the gas weight is more than 6 kilograms. The gas intake of this gas turbine is equivalent to putting the whole living room gas into the gas turbine in one second shijian."