Chapter 1341 Why is your missile like an airplane?
The follow-up work on the CTK series propellant and long-range air defense missiles will of course be left to Lin Chenggang and Shen Fangzhong to take charge.
Chang Haonan: "I have a lot of things to do, I have to focus on hypersonic weapons!"
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After the actual theory of wave-multiple configuration in the wide-speed domain was proposed and verified, the gliding superb project has entered the relatively fast lane.
However, from theoretical research to engineering development, there is still a stage to make the transition.
This made Chang Haonan take a few days off from his busy schedule and go back to Torch Laboratory to solve a small problem.
But after this, the work intensity of the entire R&D team will reach a new level.
The most critical one is naturally the design problem of wave-folding body configuration.
Although the overall plan for the wide speed domain design has been determined, the entire project team, including Chang Haonan himself, is still a little confused about how to implement it and some of the details.
Fixed the upper surface of the wave-multiplier body, and adapting to different velocities through a throwable fairing to change the lower surface profile. This is the first and most basic idea.
Simple and intuitive.
But it is a tricky choice.
Because it is ultimately to optimize the aerodynamic characteristics of different speed intervals by prefabing multiple configurations in advance.
If one of the configurations is taken out alone, its adaptation range is still relatively narrow.
Of course, there is a more direct question.
Overall, the faster the flight speed of the wave body, the more the corresponding optimal compression surface profile will protrude downward.
If a throwable fairing is used, then due to the problem of space utilization, the lower surface can only be convex and flat on the outside.
In other words, the raised fairing covers a relatively flat fixed lower surface.
Corresponding to the fast first and then slow flight process.
There is no problem when used during the verification stage.
But if it is put into use like this, it will be a bit stiff.
Although in order to improve hit accuracy, missiles do need to slow down at the end, which generally conforms to the trend of fast first and then slow, the speed of super-gliding in the process of flying with "water drift" ballistics is not constant. , but there will be multiple conversions of kinetic energy and gravitational potential energy.
When decelerating, you can throw away the fairing. When it comes to acceleration, the thrown fairing cannot be picked up and reinstalled, so the adaptability of the entire process is still not ideal.
What's more, Chang Haonan's long-term ambition is to make the wave-riding body a reusable aircraft, which requires a long gradual acceleration process.
So, this design is ultimately just used as a guaranteed solution.
If all other subsequent designs prove to be problematic, then take it out to at least ensure that the entire project has a beginning and end. "Since the throwable fairing is not flexible enough, what if it is designed as a variable?" Fu Changsheng, director of the overall design department, almost immediately followed.
"Variable?"
This ranking is obviously beyond the expectations of most people here.
Xing Muchun also said half-jokingly: "Director Fu is... not forgetting his original intention?"
Fu Changsheng is also in the aviation field, just like Chang Haonan. He was born, and in his early years he also participated in the development of the strong 6 aircraft and the reverse surveying and mapping of the MiG23 fighter.
Xing Muchun's evaluation is indeed appropriate to propose a variable structural design from a population with such experience.
For a moment, even the tension in the conference room was diluted a lot. "It's right to say that."
Fu Changsheng himself also smiled and touched the top of his head:
"It does have some influences in his early years... ”
Speaking of this, he suddenly made a turning point: "But my plan is absolutely serious." As soon as this said, everyone in laughter became serious again. "Although I did hear that the 611 Institute plans to use flexible skin to create the bulge of the DSI air inlet of the fourth generation machine, it can only be adjusted within a relatively small amplitude range... Our wide-speed wave-multiple body The difference between the two lower surfaces is quite large, and it is unlikely that it can be achieved by just adjusting the skin, right? "
Fu Changsheng glanced at Chang Hao sitting in the main seat Nan, seeing that the latter also seemed to listen carefully, he continued to say with confidence:
"I have also considered flexible skin material, but it is more sensitive to temperature and cannot support thermal and aerodynamic loads under hypersonic conditions, so it still requires mechanical structure... For example, combining wave-like bodies and retractable diamond wings , when flying at a relatively low speed, the wings extend out, providing lift with the lower surface, and the wings are placed inside at high speed, turning them into a pure wave-river configuration. "
Originally, it was just exposed, but in principle Jiang Zonglin, who was not involved in the design work, couldn't help but feel a little nervous: "Is it really necessary to change the swept wing?"
F14 and 160 that were brought back through different channels are considered to be a make-up. China has not been equipped with a small flaw in the swept-wing aircraft.
But if you really want to create a swept-winged flying body in the 21st century, it is still hypersonic...
It's still a bit abstract when thinking about it. "It's okay to say that it's changing the swept wing, but it's not a traditional sliding sleeve structure." Fu Changsheng explained:
"For example, Some mechanical metamaterials can show different morphological conversion characteristics when subjected to tension in different directions. They are very suitable for this kind of wing structure with only two morphological changes..."
No mistakes are made The first post, one content, one in 6, one in 9, one book, one bar, one bar!
"..."
For a moment, everyone started a fierce and exciting debate on this plan that sounded outrageous, but after careful consideration, it seemed to be quite reasonable.
Until Chang Haonan cleared his throat and prepared to speak.
The conference room suddenly became quiet.
"I happened to have some research on computational materials recently... Although mechanical metamaterials are a popular research direction recently, research on specific application levels has just begun. For us, new technologies bring The risk is really big..."
In fact, there is no need to continue discussing this.
If even Academician Chang said that the risk of your plan is a bit high, it must be really big.
So, no one answered, but waited for his follow-up speech.
"In fact, sometimes, there is no need to think too complicated..."
Sure enough, Chang Haonan said slowly:
"We can directly combine the wave multiplication bodies under the Mach number of designs, high and low. Some of them use hypersonic wave multiplication bodies designed under cruise conditions, while the other uses low-speed multiplications that meet the demand for takeoff acceleration. The wave body is connected with an adapter in the middle..."
"Then the trailing edge lines of the upper and lower surfaces of the wave front are stretched horizontally to form the main body, and the left and right sides are equipped with wave wings, and the lower surface of the fuselage is made of Compression surface treatment, add an oblique tail wing..."
As his concept gradually improved, the entire project team finally began to operate at full speed.
With the efforts of hundreds of members of the design department, the project plan finally stepped down the design drawings before the end of 2007.
However, there is still a last job to be completed before the real test launch-
Because of its lack of power, it completely relies on a ballistic missile to provide it with sufficient initial speed and altitude. Therefore, in addition to its own development work, it also needs to follow the missile R&D department as it did when developing the double-cone verification missile earlier. , of course, there is also the necessary coordination of the Second Artillery aspect.
After all, due to size problems, the gliding type can only be equipped with a special missile force.
Jing Zhiyuan, as the commander of the Second Artillery, had been waiting for this time.
For this reason, he also took some time to make up for some relevant knowledge about wave riding bodies and hypersonic aircraft.
Although I didn't understand it much in the end, at least I had some basic concepts.
Jing Zhiyuan was confident that no matter what kind of plan Chang Haonan brought out, he would not feel too shocked.
However, when he actually came to Huairou Science City and saw the other party report the 3D rendered diagram on the PPT...
All the preparations seemed so pale and powerless at this moment.
"Academician Chang..."
Jing Zhiyuan couldn't help but take a deep breath:
"How come your missile... is designed like an airplane?"
(The end of this chapter)