Chapter 99 The Rebirth of the Turbojet 14 (Part 1) (2-in-1)
After determining the target position, the two aircraft performed a roll breakaway simultaneously and soon came to the vicinity of the suspicious aircraft. , as usual training, sandwiching the target on the left and right for accompanying flight confirmation.
"Eagle 01 reports that we have discovered an aircraft..." Lin Kang, the lead pilot, looked at the aircraft not far away through the cockpit glass with a narrow field of vision.
On the surface, this looks like an ordinary Boeing 707, but the stars and stripes on the vertical tail and the eye-catching letters "WR" below the flag undoubtedly indicate that it belongs to the US Air Force.
Although the entire Chinese aviation force does not have a serious special aircraft at this time, Lin Kang, who has served for nearly 20 years, has never given up using various channels to collect various information about the imaginary enemy air force.
Although this is supposed to be the job of intelligence services, not fighter pilots.
This gives him some relatively obvious advantages when conducting similar accompanying flight verification tasks.
For example, at this moment, he knew that "WR" represented the 93rd Air Control Wing from Georgia.
But he did not search for a similar model from his memory.
After slightly lowering the altitude, Lin Kang finally saw the huge long fairing under the belly of the opponent's aircraft.
"A reconnaissance aircraft on the Boeing 707 platform, it should be an electronic reconnaissance model, but it is not RC135. This is the first time I have encountered it."
"Understand, keep flying with it, if it makes any further movements immediately Report."
A slightly nervous voice came from the radio.
In fact, if the near-face-breaking conflict at the beginning of the year hadn't woken up some people, there might not even have been an emergency takeoff in the face of aerial reconnaissance.
The Chinese military, which is relatively immature in the field of sea and air confrontation, is actually not ready to face similar incidents in terms of technology and experience.
Pilots like Rincon's generation do not lack courage.
But there is only courage.
Courage alone is not enough.
Compared with the clear territorial boundaries between Jingwei and Weiwei, the situation in the sea and air domains is much more troublesome.
The legal status of the airspace over the exclusive economic zone is a very complicated issue.
There is no doubt that this is not airspace.
Relevant provisions of international law state that flying or navigation in this area must respect the sovereignty, national defense and security of the other country, etc. However, these vague and metaphysical provisions are not operable.
Therefore, when countries face similar situations, the general approach they take is to use non-force means to interfere and expel.
Non-force means.
It sounds harmonious and much safer.
But just like in martial arts novels, the level required to open mountains and crack rocks is often not as good as the ability to retract and release freely. In actual operation, this is much more difficult than firing down a target.
After turning a 180° turn, the plane still maintained its original route.
"Requesting to interfere with the target's flight path!"
Lin Kang roared at the radio.
Whether it is from the perspective of national dignity or intelligence security, he is unwilling to allow such a reconnaissance aircraft to fly for a long time more than 100 kilometers away from the coastline.
There was a rustling sound in the headphones for a few seconds, and then a steady voice.
"Requesting approval, but the other party has not entered the airspace and cannot use weapons!"
Lin Kang naturally understands the relevant principles, but the commander of the 4th HNA Division on the radio station is still worried about his men The best pilots are impulsive, so they emphasized it again:
"In addition, be sure to ensure your own safety!"
A lot of things flashed through Lin Kang's mind like a revolving lantern. Cases that I have seen in books or internal materials.
Most of them came from the Soviet Air Force.
In addition to more extreme cases such as the scalpel in the Barents Sea, the Soviets, who were extremely experienced in confrontation, naturally had other ways to deal with provocations from the NATO air force.
For example, for heavy-duty aircraft like the Su-27 or MiG-25, when two engines with a total thrust of more than 20 tons turn on afterburner, the airflow ejected will affect most aircraft.
Lin Kang didn’t know if his little plane could do it, but he decided to give it a try.
After a brief communication with Chen Haisheng on the other side, he adjusted the position and attitude of the aircraft and pushed the throttle lever to the end with his left hand.
The turbojet 7BM is really not an engine with excellent performance. The number displayed on the tachometer increased slowly and unhurriedly, which made the J-7's action of passing by the reconnaissance aircraft almost lack any aggression.
Lin Kang again controlled the aircraft to keep flying in front of the target, but the mere 6.5 tons of afterburner thrust was really difficult to effectively interfere with a Boeing 707 platform aircraft.
Correspondingly, the atmosphere in the cockpit of the E8C was much more relaxed.
Of course they are no strangers to Lin Kang's actions to interfere with flight. Before 1991, the two of them had faced similar scenes countless times over Eastern Europe.
But at that time, the situation was much more intense.
There was even one occasion when an RC135 piloted by Lieutenant Colonel Albert stopped both engines on the right side in the air due to close interference from a Su-27.
It was 1988, and the entire crew was about to die on the spot just shy of the last 300 meters.
“Look at this small plane, it seems to be saying hello to us in a friendly way.”
The co-pilot looked at the fighter jet that was very similar to the MiG-21 not far in front of him and couldn’t help but He showed a bright smile.
"Then it seems that we should return the gift to show friendship?"
Albert gently turned the steering wheel in his hand left and right, making a motion of shaking the wings.
The three people in the cockpit burst into cheerful laughter.
"I think the pilot must have received our goodwill." The flight engineer behind said.
Lin Kang in the J-7 cockpit looked through the rearview mirror and saw the aircraft behind him shaking its wings provocatively.
This action made by a 150-ton aircraft cannot be called sensitive, but it is undoubtedly to show that its flying posture is under control and is not affected at all.
It was as if he was laughing at the little plane in front of him that was overestimating its capabilities.
"Fuck..."
Lin Kang had been well-educated since he was a child, so he couldn't help but curse in a low voice when he saw this scene.
He reached out and touched the emergency fuel release switch in the air.
When a large amount of aviation kerosene is released in a concentrated manner, it will give the following aircraft the feeling of being peeed. In addition to the psychological impact, it will also interfere with the pilot's vision.
Before flipping the switch, Rin Kang habitually looked at the plane's fuel gauge.
At the same time, the teacher's voice came from the radio again.
"Eagle, report the remaining fuel level."
"Huh——"
Lin Kang exhaled a breath of turbidity unwillingly.
"The remaining 40%."
As a light fighter, the fuel capacity of the J-7HH has always been a huge problem.
The maximum take-off weight of the J-7 is only about 8.5 tons.
In the transition state with an auxiliary fuel tank, the ideal range is less than 1,400 kilometers.
For comparison, the Su-27 can carry nearly 9 tons of fuel in the aircraft alone, which is heavier than the entire J-7 aircraft.
Excluding the distance from the airport to the mission airspace and the extremely high fuel consumption when flying with afterburner.
There is really not enough fuel for Lin Kang to squander.
Even judging from the current situation, they will have to return in about ten minutes.
Obviously the reconnaissance plane behind saw this and showed no urgency at all.
“Get ready to return, there will be two planes from the Air Force brotherhood to replace you.”
The division commander's voice was also full of reluctance -
The Air Force took off with the same two J-7s, and they would also encounter the same problems as Lin Kang and Chen Haisheng.
Facing the reconnaissance plane that was obviously malicious and loitering not far from their door, they had no choice.
But if you don’t give in, what can you do? The performance of the aircraft will not change due to the subjective initiative of the pilot.
The J-7, no matter what, can no longer hold up the sky of a huge country like China.
......
Compared to the earth-shattering incident at the beginning of the year, this incident did not cause much of a stir in the media on both sides of the Pacific.
For most people, this is a very ordinary day.
But for others, it is not.
The news quickly spread as far as confidentiality allowed.
Anyone with a clear eye can see that there is no problem with the naval aviation's response.
The problem is not having the right equipment.
No matter how good the Su-27 is, if it does not have the corresponding aviation industry strength to provide maintenance and support, it will not be able to exert sufficient combat effectiveness, and even flying around will be very difficult.
And the aircraft produced by ourselves are really difficult to use.
About a week later, at the end of a regular meeting, Yang Fenghata produced a press release.
Of course, what happened will not be written clearly in it, but people here have basically heard about it.
What dazzles everyone is the last sentence of the draft.
“Make full use of the accessibility of existing equipment, solve problems such as equipment deployment, network chain construction, and multi-domain support, and maximize the combat performance of equipment to promote the overall improvement of combat effectiveness...”< br>
Although it talks about positive things like troop training and preparation for war on the surface, there is bitterness and helplessness between the lines.
"Comrades, every word here is poking our spines..."
Yang Fenghao looked at the members of the Turbojet 14 reform attack team and said in a slightly sad tone .
The entire venue was silent for a while.
Of course it was Chang Haonan's intention to show the draft, but it was more appropriate for Yang Fenghata to come forward and say some things.
Compared with the high-profile mobilization meeting, this method has obviously better motivational effect.
As the saying goes, you will be polite after hearing it, and you will be brave after knowing your shame.
Although no one took the initiative to say anything, the work efficiency of the entire research team has risen to a higher level.
The next night, the Mach number contour maps and wall limit flow spectra corresponding to several typical rotor/stator blade stacking line designs were sent to Chang Haonan, who had been waiting for a long time.
In the original plan, this should be the last part of the regular research step.
After this, you can start optimizing the compressor blade design to maximize the surge margin.
However, he didn't feel any relief at all.
Because last week, Du Yishan from the capital contacted the 601 institute.
A research team from Bingcheng University of Technology found that flow loss can be reduced by opening a gap between the pressure surface and suction surface of the compressor blade.
The relevant experimental data was quickly mailed to Chang Haonan.
After receiving the information, he spent one night conducting a simulation on an ideal stage35 compressor model.
Combined with the data provided by Associate Professor Na Fei, it can be determined that this phenomenon is real.
However, it is always simple to study a single independent variable on an ideal model.
To apply it to actual design, more realistic factors need to be considered.
Especially after the turbojet 14 compressor blades were improved by Chang Haonan, there will definitely be a large number of bending, twisting and sweeping designs, which in turn leads to the existence of the actual flow field and the plane two-dimensional flow field under ideal conditions. Huge gap.
Looking at the data submitted in front of him, Chang Haonan faced such happy troubles for the first time——
There are so many ways to improve performance, should we use them all?
Compared with the swept design which focuses on increasing surge margin, blade slits can also reduce the total pressure recovery loss caused by the compressor, especially at a certain angle of attack.
Although it has little effect on the maximum thrust of the engine on paper, it can significantly improve the performance and stability under harsh air intake conditions.
This is what the J-8-3 needs most at present.
“Only children make choices…”
As an adult, he naturally wants it all.
But on the other hand, Chang Haonan had never been exposed to theories related to jet slits even before his rebirth.
This was new knowledge to him.
Since the current project being carried out by the system only considers modifying the blade shape, if you want to temporarily add a new independent variable, you have to rely entirely on yourself.
With Chang Haonan's current proficiency in numerical simulation, this job is not impossible.
But without the work efficiency buff provided by the system, there is no guarantee of progress.
……
Fortunately, this trouble did not last long.
Because early the next morning, Yao Mengna found Chang Haonan, who had been sleeping in the computer room for two nights.
"Junior, regarding the blade slit issue, I have a few areas where I need your help."
"Help?"
The sleepy Chang Haonan turned back in confusion, his bloodshot eyes startling the latter.
A few seconds later, he finally came to his senses:
"Wait...means you have already studied it before?"
This is definitely an accident. of joy.
"Well, actually before Teacher Du contacted us, I had already seen the article published by Tao Fei's research group in a journal. I have been studying it for about two weeks, but..."
said At this point, Yao Mengna was a little embarrassed and smoothed her hair:
“It’s just that I’ve been stuck in the accelerated convergence part of the simulation method, so the data I got is very limited.”
“Originally, I I want to see if I can complete research on a topic independently without relying on your guidance, but...compared to my own obsession or face, the progress of the project is more important.”
Although Yao Mengna found many reasons to convince herself not to ask Chang Haonan for help, people can't deceive themselves.
She knew very well that the most important reason was her obsession to prove her ability -
"Even if you can't compare, you can't be left too far behind."
And what really made Yao Mengna The one who decided to let go of this was the draft that Yang Fenghata took out at the end of yesterday's meeting.
When she read the last paragraph, she realized that she seemed a little too narrow-minded.
There are many ways to prove yourself, and there are many opportunities.
At this critical moment, we must focus on the overall situation.
"I should have told you about this when I received the call from Teacher Du last week. I'm sorry."
"No, it doesn't matter, or rather, you came at the right time. It's time."
Chang Haonan stood up and strode to Yao Mengna at the door:
"Take me to see your results"
After such a long period of cooperation, he probably knows Yao Mengna's abilities in the field of numerical calculations.
Since the other party said that the part where he was stuck was that he did not know how to accelerate convergence, it means that the entire simulation idea should be OK.
If improvements can be made on this basis, the amount of work that needs to be completed will be much smaller.
Maybe some useful analytical conclusions have been drawn.
The two quickly arrived at another computer room not far away.
"It's all in this." Yao Mengna pointed to the workstation that was still on and in the process of calculation:
"I am really unfamiliar with numerical simulation in a Unix environment. You... can do it later. Can you slow down a little bit? I want to see where my problem lies."
"Of course, but... don't rush in. I'll take a look at the data you calculated during this period."
Chang Haonan stepped forward as he spoke, stopped the ongoing simulation process, and called up the previous results for analysis.
(End of this chapter)