Chapter 452: Computational problems of aerodynamics

Who thought it was...
It turned out to be an old man with shaggy hair.
There is a very conspicuous rosacea. Wear reading glasses. I feel at least seventy years old.
The point is that when he walks, he actually has to use crutches.
"Who?" Wang Bu'an asked curiously.
"Fu Wenou, Mr. Fu Lao," Shangguan Yuqiang introduced in a low voice, "from 328 Research Institute."
"What is it for?"
"Helicopter research."
"Oh."
Wang Bu'an nodded.
Dare to love others is doing professional research.
No wonder you are dissatisfied.
No wonder you have to trouble yourself.
In other words, I should be considered a monk halfway through.
How long have you been doing it for most of your life? Months? I am afraid it hasn't been in a few months. It's strange if others serve you.
You a nasty kid, why should I listen to you.
The person who established the White Whale Technology Company probably deliberately gave himself a little bit of power.
Okay, come on!
Lao Tzu is waiting for you to challenge.
What about the old guy?
I got up so hard that even the old guy beat.
Being old and disrespectful should be beaten.
"Huh? Who are you two? Why are you here?" The old man said in surprise.
"I..." Wang Bu'an hesitated to speak.
"This is Mr. Wang Buyan." Shangguan Yuqiang hurriedly introduced.
"What for?" Runeou frowned.
"..."
Wang Bu'an was speechless.
This is... This is also called a company?
You don't even know the name of the chairman and general manager? Is it directly regarded as air?
Or is the company established in a hurry, and there is not even a meeting?
It's basically like saying hello to passers-by?
"He is the chairman and general manager of Moby Whale Technology Company." Shangguan Yu Qiang said slowly.
"What is it for?" The old man said he still didn't understand.
"It's your biggest boss. Give you funds. Give you personnel. Give you technical support."
"Oh I see."
The old man suddenly realized, and then quickly took out a bunch of information.
A very thick pile of materials. All are 16-carat drawings.
There are also very complicated calculations on part of the drawings. It is written in pencil. There are still traces of alteration in many places.
According to preliminary estimates, this should be the most original design draft. It has not been tried. There is no stereotype.
Similar design drafts will definitely be revised upside down.
Maybe the final product has no 10% similarities with the current drawings.
doing what?
Give it all to Wang Bu'an.
Ask him to review.
As the name suggests, it is an audit, but it is actually a disguised inspection of Wang Bu'an's technical level.
Wang Buan accepted it calmly.
Good guys.
All are technical information.
Most of it is about aerodynamics.
Among them, some of the rotating airflows involved overlap, offset, turbulence, and interfere with the calculations, which can be said to be puzzling.
There is no precedent for these things.
Others Boeing will not disclose these data.
Bell Helicopter will not leak secrets even more.
All data needs to be calculated and explored by yourself. It is difficult, difficult to take shortcuts.
The appearance of the tilt rotor aircraft can be copied. But the key technology cannot be copied.
The 328 Research Institute specializes in tilt-rotor aircraft.
Now, all his personnel have been transferred to the White Feather Whale Company.
As the director of the 328 Institute, Fu Wenou is now in charge of a laboratory. The only research task is still the tilt rotor aircraft.
The difference is that in the past, the state allocated research funds.
Now it is paid by Wang Buyan.
That's right, everything has changed.
Wang Bu'an is now in charge of this project.
Runeou needs funds, talents, and raw materials, all of which need to be applied from Wang Bu'an.
No wonder he will have many complaints.
If you are not careful, you want to find someone to vent.
In any case, he used to be a "state cadre". They eat the royal food. Maintaining income during droughts and floods. stable job.
Now, it is transferred to a private company. Maybe it will go bankrupt at some point. The future is bleak.
Fortunately, the old man's emotions are well controlled.
Finding that Wang Bu'an was very young, he didn't think much of himself.
To breathe with young people?
bored.
"Mr. Fu, please."
"No. I'm very busy. Notify me when you have finished reviewing."
"Don't worry, I only need five minutes."
"what did you say?"
"These aerodynamic calculations are not difficult. I can review them in five minutes."
"you……"
Runeou was a bit deceptive for a while.
five minutes?
you sure?
Are you sure you are not kidding?
You know, he spent a lifetime studying these calculations!
The research on tiltrotor aircraft actually started in the 1950s and 1960s. It's just that the technology has not matured. Research is also intermittent.
In the past, China was not open to the outside world. It was very difficult to obtain relevant information. It's completely on my own.
Later reforms and opening up, introduced many new technologies. The road of research and development is a bit smoother.
However, it is impossible to introduce key technologies.
Especially the key data about aerodynamics, others are highly confidential.
The current conditions in our country cannot be calculated.
First, I don’t know how to calculate it.
Second, the amount of calculation is too large to consume.
Tianhe One is very powerful.
Tianhe 2 is also very powerful.
The light of Shenwei Taihu Lake is also very powerful.
Using them to calculate, there is definitely no problem.
But, can't afford it!
The cost of one calculation is very high.
The program for aerodynamics is very complicated and unpredictable, and requires a lot of calculation data.
To say that the world has changed the most, the first is the human heart, the second is the air, and the third is the water flow. If you want to calculate it completely, the difficulty is even daunting for Tianhe-2!
Can Wang Bu'an do it?
of course can.
He is backed by Transformers!
With the computing power of Transformers, what is the small aerodynamics?
The computing power of a robot wizard is equivalent to countless divine powers of Taihu Lake. The latter takes tens of thousands of years to calculate the answer, and it can be completed in a few seconds.
Wang Bu'an was also not polite, and directly billed.
It seems that Runeou didn't specifically come to trouble him.
Perhaps, the old man did have some emotions before. But after discovering that he was too young, the other party did not continue.
Respect the old and love the young. It is estimated that in the eyes of the elderly, he is still a "child".
The requirements cannot be too high.
He couldn't let Runeou look down.
It doesn't matter whether you slap your face or not. The important thing is to let the other party know that Wang Bu'an is not here to eat.
I can chew on this messy company.
Especially for technical issues, I can beat all of you with only 0.001% of my brain.
Wen has no first place.
Wu Wu second.
In front of professionals, you have to show your expertise.
Otherwise, others will not look down on you. It doesn't care about you at all.
"come in."
"it is good."
Wang Buan sat down in silence.
Robot Wizard No. 1 begins to count.
Robot Wizard No. 2 begins to calculate.
Give the result directly.
If there is no result, give the formula directly.
These data are actually a weird big problem similar to the horns of the horns encountered by the tiltrotor.
What big problem?
It is that two cyclones interfere with each other.
It is strange that if the same two rotors are connected in series, it is almost fine.
But if left and right are connected in parallel, they will interfere with each other and weaken each other. In the end, it even caused a serious drop in lift, which was less than one-fifth of the standard requirement, and eventually led to a crash.
This problem has plagued the tilt-rotor aircraft for 30 to 40 years and has not been resolved.
Until now, the V22 Osprey can only be said to have improved. Rather than a fundamental solution.
Perhaps, one day, under special circumstances, the cyclones caused by the two rotors will weaken each other again, and then the plane will fall straight.
What is the root cause of this problem?
Air flow is horizontal.
The turbulent air flow overlaps.
Stable airflow is like granite.
The rotor can obtain sufficient lift in a stable airflow. This is where the most basic lift of a helicopter lies.
However, if the air flow is disturbed, the granite will become shale and limestone.
The support is seriously insufficient. Lift will fall sharply.
How to solve?
First, the best way is not to connect left and right in parallel. Don't develop tilt rotor aircraft.
Second, the remedy. It is the cutting layer that staggers the airflow.
Third, the standby lift system.
Fourth, the backup injection system.
Obviously, the first one is impossible.
The second one is being done. The main method is to stagger the rotation frequency of the rotor. Even slightly adjust the angle of the blades. Minimize the mutual interference between the two rotors. UU reading www.uukanshu.com
The third one is also being studied by Bell Helicopter. There are already some effects. Can effectively prevent crashes.
Fourth, there are some ideas.
This shows that people on earth are still very smart.
They also thought of many effective methods, but the effect was not very good.
For example, the backup lift system.
It is difficult to lift the entire helicopter.
It can only be said to barely avoid the rapid crash of the helicopter. Give the controller more time to adjust the aircraft attitude.
For example, tilt the plane. Tilt back and forth. Tilt left and right, it may be cut out of air flow.
The backup jet system pushes the helicopter away from the special airflow environment.
The reason for air cutting is very complicated.
There are inside and outside. Mainly the airflow cutting caused by the rotor itself.
There is external. Including wind direction, wind speed and rotor vibration, impact, scattering, refraction, splashing, etc. Under certain special conditions, the airflow will be very turbulent.
And crashes often happen in these special circumstances. It can be said that it is impossible to prevent.
It is unrealistic to want to show through all the formulas.
Unless it is a simulation of working conditions with a supercomputer.
Various wind tunnels can only simulate one-tenth of the situation.
In other words, there is still 90% of the situation that cannot be simulated.
Or in other words, you can't even imagine it.
Nature is unpredictable, and no simulation tool can perfectly present it.
One minute passed...
Two minutes passed...
Three minutes passed...
Runeou looked at the manuscript paper in his hand in a daze.
This Wang Bu'an is really fast.
In just a few minutes, so many results were given.
This little guy, it seems not easy!