Chapter 1173: Fighting Around the World in One Hour

Chang Haonan paused for about a second to let the leaders have an idea of ​​the appearance on the PPT.

Then he moved closer to the microphone again:

"The first type is the traditional waverider, which is also a theoretically optimized conceptual shape reversely designed from the perspective of aerodynamic performance. It has the best lift-drag characteristics among all solutions. Thanks to the foresight of academician Qian and other seniors, our country Considerable research results have been accumulated on this configuration.”

"However, the volume of the waverider is very small, and due to its special shape, the internal space utilization efficiency is also low. When considering the mission load, almost only the use of external rockets or ballistic missiles can be considered as the propulsion system. "Give it a high trajectory height and initial velocity before gliding, but there are insurmountable shortcomings in using air as the oxidizer."

"In terms of weapon applications, this type of configuration must be large in size and can almost only be carried by launch vehicles, launch silos or ballistic missile nuclear submarines. It is difficult to hide the target characteristics during launch, and there is a large range close range. Therefore, it is more suitable to carry out medium and long-range strategic strikes..."

Everyone here is from his own family, so Chang Haonan doesn't have to deal with the frivolous things and directly use them for strategic deterrence.

However, this part of the content is still relatively routine.

As he himself said just now, the domestic research on traditional waveriders is relatively mature, so the relevant content was naturally mentioned in the previous reports of the Institute of Mechanics and the Aerospace Science and Industry Corporation.

It's just not necessarily so naked.

However, Chang Haonan's last words before turning the page still touched everyone's hearts:

"For example, if the Dongfeng 31 missile is equipped with a traditional waverider-shaped gliding warhead, it can become a complete intercontinental ballistic missile and cover most key locations in North America..."

Several leaders even had their eyes dazzled.

As an important weapon of the country that was only tested before the 1999 military parade, the status of Dongfeng 31 is indeed somewhat embarrassing.

In terms of range, it barely touches the standard edge of intercontinental missiles, which results in limited actual combat value. It also directly misses the point for others, resulting in a greatly reduced deterrent value.

Although the Dongfeng 31A with the extended range is nearing the end of development, it is difficult to say that it will be able to make up for it.

This made the Second Artillery 8xx Brigade equipped with the basic Dongfeng 31 model quite embarrassing.

The Aerospace Science and Industry Corporation has even considered learning from the experience of the Russians next door and using Dongfeng 31 as a launch vehicle.

Although it is indeed a solution, it is a pity no matter how you say it.

And it’s shameful.

But if it can be "brought back to life" by replacing the warhead, that is another matter entirely.

Instead, it showed the imaginary enemy our ultra-high fault tolerance rate.

Looking at the reaction of the audience below, Chang Haonan knew that his purpose of writing that report was probably more than half successful.

But now was not the time to be happy, so he calmed down and continued:

"The second category is the traditional wing-body combination model."

"The combined aerodynamic layout has a fuselage in the traditional sense, so the internal space is used very efficiently. The aerodynamic design technology has the basis and experience of traditional design ideas, but its design must be completely carried out in a three-dimensional sense, and its shock wave system is very It is complicated, and the cost of R&D and manufacturing is very high. It was precisely for this reason that Academician Qian vetoed our country's space shuttle program..."

"The third category is the aerodynamic layout of the lifting body. Its characteristics are similar to the wing-body assembly, but the shape is completely incompatible with the use of air as the oxidizer. It must be launched using a launch vehicle..."

"After more advanced thermal response and thermal protection technologies are obtained in the future, the above two configurations can be considered for use in aviation/space vehicles such as aerospace planes for space-to-ground transportation, or weapon launch platforms. However, due to the high cost, It is not suitable for use as disposable ammunition itself..."

Chang Haonan originally planned to quickly get over these two parts that were not the focus of today.

But one of the two chiefs in the middle is clearly interested.

He even raised his hand while recording in his notebook.

Laughing to death, the leader raised his hand, of course it cannot really be taken as a request.

So Chang Haonan was really flattered and quickly stopped turning the page.

"Comrade Haonan, you just mentioned the issue of thermal response and thermal protection. It happened that the previous report on the manned space project mentioned that the thermal protection of the spacecraft return capsule, including the thermal protection of the US space shuttle, is one-time. It can only take effect within a short time of re-entry into the atmosphere.”

The other party raised his head and said in a kind tone:

"If the hypersonic aircraft you are talking about needs to fly within the atmosphere for a long time, is there a relatively mature, or at least confirmed, effective technology to protect the aircraft itself?"

Chang Haonan's initial plan actually had some relevant content, even involving the analysis method of structural temperature field and stress field, but it was later deleted due to the audience's acceptance.

Now that someone asked about it, he summed it up:

"In terms of appearance, the waverider does have sharp edges and the aerodynamic heat peak is more serious than the edge of the blunt body. However, the nozzle can be set at the symmetrical center position of the front end of the flying body. When the total pressure ratio between the jet and the mainstream reaches When 0.35 or higher, it can interfere with or even isolate the mainstream flow field to achieve better thermal protection effect. "

"Of course, more specific research still needs to rely on large-scale hypersonic wind tunnels and actual test flights for verification..."

The leader lowered his head and wrote a few strokes on the notebook, and at the same time stretched out his hand slightly to signal:

"Okay, please continue."

Chang Haonan:

"Okay."

Good boy.jpg

Then continue to turn the page.

"The next fourth type of configuration is relatively simple, similar to the traditional slender aircraft fuselage. If a rocket engine is used, it belongs to an axisymmetric cone or a double cone. If an air-breathing engine is used, it can be like a fighter with head intake, through the Mach cone to reduce wave resistance and provide inlet intake conditions for the engine."

"This design is not difficult, the control system is simple, and the manufacturing cost is also low. Although the internal space utilization is limited, it is still better than the traditional waverider. The disadvantage is that the lift and drag are relatively low, so the speed potential is limited, and it is difficult to reach more than 7 times the speed of sound. Therefore, it can be considered for early models of hypersonic weapons, carried by ballistic missiles or high-altitude high-speed aircraft to compress the transfer time of enemy targets."

Chang Haonan simply did not discuss interception.

Judging from the experience of the previous life, China's imaginary enemies in the foreseeable future basically do not have the ability to intercept hypersonic weapons in the atmosphere.

Hearing this, Qiao Chenqing paused slightly, and seemed to be somewhat interested.

After all, Chang Haonan mentioned "carried by a hypersonic aircraft."

Therefore, in the former's view, this is obviously the most effective weapon that the Air Force can obtain when it is temporarily unable to involve nuclear weapons.

However, he looked at the situation around him and finally did not speak.

It was at this time that Chang Haonan paused for a moment, then took a deep breath and entered the most important part of his entire report.

"This is the last one, and it is also a configuration that my research group is focusing on."

As he clicked the mouse again, a three-dimensional rendering with a shark-like mouth and full of momentum appeared on the screen.

"A two-dimensional characteristic hypersonic aircraft based on the concept of waverider layout, referred to as a waverider-like aircraft."

This somewhat difficult name took a while for the big guys to digest.

Fortunately, the phrase structure is clear and not difficult to understand.

"This type of aircraft retains the advantages of a waverider. Its shape has a sharp leading edge like a waverider, so it has a smaller wave drag and a higher lift-to-drag ratio. It also has the advantage of a larger volume ratio of the wing-body combination layout, which can relatively easily accommodate autonomous power and mission payload at the same time."

"More importantly, the two-dimensional characteristics of this type of aerodynamic shape can easily construct a forebody shock wave system, which fully meets the intake conditions of the scramjet propulsion system. It only needs to use a limited volume rocket booster to provide an initial speed of about five times the speed of sound, and it can fly normally in the atmosphere like an ordinary cruise missile. If a dual-mode scramjet engine is used, this initial speed can be reduced to about three times the speed of sound..."

"At the same time, thanks to the powerful forebody shock wave and lift-to-drag ratio, the maximum speed potential of this configuration can reach 12-15 times the speed of sound, which is roughly equivalent to 4-5km/s, or about 1h..."

Chang Haonan marked a few numbers on the PPT in black bold font.

But even so, for most people, this speed is still too terrifying to establish an intuitive concept.

However, he also had a good idea -

The next page of the PPT was a complete world map.

However, a circle with a radius of 1 was drawn with Beijing as the center...

Except for Brazil, Chile and parts of Antarctica, almost all of the land on the earth was included.

Chang Haonan swore that he heard more than one inhalation the moment this picture appeared.

But he still used his greatest willpower to resist the temptation of "looking back".

Instead, he went directly to the side of the curtain and pointed to the edge of the circle on the map:

"As an intra-atmospheric aircraft, this weapon does not need to consider the problem of the ballistic ascent phase."

"That is to say, it can hit almost any location on the earth within an hour after launch!"