The military-industrial scientific research system of the academic master

Regarding this inference, Liu Yongquan who was standing next to him was not too surprised.

After all, he had long known through Chang Haonan that after the 601 failed in the selection of the fourth-generation fighter, he had the idea of ​​skipping the development of the fifth-generation fighter, and even booked a technical verification cooperation with the Aerospace Power Group for the next-generation variable cycle engine.

But Lin Jihong never expected that his new leader's ideas would be so wild.

"The next generation?"

Generally speaking, although pre-research work carried out in advance is common, it is basically concentrated on conceptual and theoretical research, or simply focuses on a specific key technology, and the overall design is rarely included in it.

For example, in the early 1990s, when the second-generation fighter jets had just been built, they began to use the J-7 and J-8 to conduct technical verification of fly-by-wire systems and stealth.

The actual proposal of a practical fourth-generation fighter concept plan was already around the time when the J-10 was finalized at the beginning of this century.

"yes……"

Yang Wei nodded:

"In fact, to sum up, the design of aircraft since the jet age, especially the missile age, is generally developing in the direction of becoming more and more concise in configuration and more and more complex in control. So I am thinking that future fighter jets will not Is it a design where the wing structure is extremely simplified and only relies on a small area of ​​​​action surface to maintain stability and maneuverability? "

“If this trend is true, then the active control system must be frequently effective, and if some additional technologies can be used to compensate for the additional radar reflection area generated during the opening and closing of the wing, then the radar signal characteristics of the entire aircraft can be Narrowed down to a very exaggerated category..."

Lin Jihong had never considered such a long-term matter. After thinking about it for a while, he said in a half-joking tone:

"The wing structure is simplified, and only the action surface is relied upon to maintain stability and control... Why does this sound like a flying wing layout?"

After saying this, all three people in the group laughed out loud.

Although the flying wing layout has various advantages, it is obviously not suitable for use on fighter jets that require flexibility.

After laughing for a while, Yang Wei shook his head jokingly:

"It's better to leave the flying-wing layout to bombers or transport aircraft..."

Liu Yongquan couldn't help but joked:

"If the flying wing layout also counts, then the Americans can completely modify the definition and count the B2 as the next generation of equipment after the F22 and F35. This will save money on research and development..."

Another burst of cheerful laughter.

It wasn't until he calmed down that Liu Yongquan answered the question Yang Wei had just asked:

"Theoretically, the control strategy to cover any position with plasma is similar, but at least at this stage, the delivery of plasma is highly dependent on the high-temperature and high-pressure gas environment... If you want to free up two additional flows in the engine, Tao, we also need to ensure that the fluid energy in it remains unchanged, which is almost impossible to achieve in engineering unless..."

Having said this, he hesitated for a moment.

"Unless what?"

Yang Wei's speaking speed was much faster than before.

Liu Yongquan shook his head:

"Nothing... Unless you use a ramjet engine with higher energy and more direct power generation, you can ensure sufficient fluid energy. But Mr. Yang, you also know that this type of power is difficult to use because of problems with starting conditions and working stability. On ordinary aircraft..."

"..."

…

With the cooperation of almost half of China Aviation System, the Yudu No. 243 test bed that had been decommissioned was put back into use in a short period of time.

A J-10S prototype that was replaced with a turbofan 10A plasma test and verification aircraft later had its wings removed and was transported by land from Rongcheng to Chongqing——

A single-engine aircraft equipped with an engine that has not been fully tested will never be allowed to fly directly into the sky.

When Liu Yongquan followed the test machine to the electromagnetic testing center for the second time, the hill behind the old park, which was originally quite deserted and even a little dilapidated, had been revitalized in popularity.

Nearly a hundred technicians belonging to several different units are adjusting the fixation method of the J-10S prototype in accordance with the requirements in the test plan.

Although the support base has been contour optimized and made of materials with strong scattering energy, in order to avoid interference with the test results, in addition to setting the noise removal in the radar software, it is also necessary to put the aircraft in a more suitable position. angle.

In particular, the most critical target of this test is the radar signal characteristics directly behind the aircraft, so an additional elevation angle needs to be set to ensure that the incident angle of the radar waves is flush with the central axis of the aircraft.

Seeing Liu Yongquan and Lin Jihong walking into the control center, Zhang Pinsheng handed the command walkie-talkie to another staff member next to him, and then led the two to a computer with a very period feel.

On the screen, a curve with a high center and low ends is displayed:

"As a blank control, we have recorded the RCS value of the rear hemisphere of this aircraft when the engine is not started. The 90° axis of the abscissa is directly behind the fuselage..."

Zhang Pinsheng introduced:

"In fact, under normal circumstances, an aircraft that has not undergone stealth treatment should have the largest RCS on the side. However, in order to ensure the test accuracy in the key range of 60-120°, several main reflection features on the front and side of the aircraft are all given by the support platform. It’s covered, so it looks smaller. Fortunately, it won’t have too much impact on your testing needs..."

"..."

Yudu is the electromagnetic testing center. The staff have rarely seen real aircraft in working condition, so the startup process requires the assistance of technicians brought by Lin Jihong and Liu Yongquan.

Of course, since this is a test aircraft after all, it is impossible for a pilot to actually sit in the cockpit.

All startup processes are performed remotely in the control center.

For the veteran aviation personnel from the 606 and 611 research institutes, the whole process is as normal as eating and drinking.

It can be seen through the camera installed in the distance that as the throttle control lever is slowly pushed to the end, a light blue afterburner flame suddenly appears at the tail nozzle, like a fierce fire spurting from the mouth of an angry dragon. The ground licked the concrete floor below.

After being reflected by the specially installed water-cooled flame shield, it turned into a substantial heat wave that rolled upwards, even causing a slight distortion in the surrounding air.

After confirming that several core parameters had gradually stabilized, Lin Jihong turned to look at Liu Yongquan who was not far away:

"Mr. Liu, the engine has entered normal afterburner working state. The next operation will be left to you."

Check out the 16-9 book bar and see the correct version!

The latter did not reply, but just started a series of codes that had already been entered into the computer——

The plasma magnet control program is quite complicated and may be further adjusted at any time. In addition, the performance of the old equipment here is really limited, so it is not a fool-proof one-button start operation.

After Liu Yongquan hit the Enter key, the situation in the test area quickly changed.

"I'll go..."

Zhang Pinsheng, who rarely sees the engine afterburner turned on, even exclaimed——

The tail flame, which was originally only light blue, turned directly into a relatively thick blue-purple, which looked really beautiful under the slightly gloomy sky in the middle of winter.

"No way, there are some sequelae of the built-in plasma tube..."

Liu Yongquan naturally saw the other party's surprise and quickly explained:

"If I have to say it, it's actually a waste of a lot of energy."

After all, there was still business to be done. Zhang Pinsheng quickly suppressed the shock in his heart and moved closer to the microphone to start arranging the work:

"Radar No. 1 is powered on and performs a half-cycle round-trip movement around the orbit, 10 sets of cycles!"

At the edge of the test area about 1km away from the aircraft, a rail car equipped with a radar antenna array began to move in a uniform circular motion.

Like many natural phenomena, the reflection intensity of radar signals is not a stable value, so in the next about 15 minutes, the car will run back and forth 10 times to ensure a more representative result...

But not long after, even before the first cycle was over, someone discovered that not only around the engine tail nozzle, but also on both sides of the aircraft's horizontal tail and the edges of the twin ventral fins, there was a layer of vagueness. No halo.

At first, some people thought it was because they were dazzled or because the resolution of the optical observation equipment was not enough.

But soon, this halo strengthened to the point where it was impossible to ignore.

The plasma sheath itself is of course optically invisible, but the high-energy airflow as a carrier has become a symbol, giving everyone the opportunity to "observe plasma with the naked eye."

"It can actually cover the surface of the fuselage stably..."

Lin Jihong's eyes widened slightly.

However, despite being shocked, he suddenly felt a little worried:

"Speaking of Mr. Liu, the tail and ventral fins of the aircraft have not been treated with special heat protection like the engine nozzle... If this continues, won't it be burned out due to the high temperature?"

"You really asked about my knowledge blind spots..."

Faced with this problem, Liu Yongquan scratched his head in distress:

"However, according to Academician Chang, the temperature concept of plasma is quite special, and the so-called temperature is essentially equivalent to the macroscopic presentation of particle kinetic energy. Using electromagnetic fields to control the coverage of plasma can itself isolate particle kinetic energy to a certain extent. The role of…”

Before Lin Jihong could react, Zhang Pinsheng intervened in surprise:

"This principle seems to be... similar to that of a tokamak?"