Before returning to the college entrance examination, I became popular in the science circle

It does not mean that the speed reaches Mach 5 or above to be called a "hypersonic weapon".Generally speaking, traditional missiles can be divided into two categories: cruise missiles and ballistic missiles.

The flight principle of cruise missiles is closer to that of aircraft. Its ballistics are basically inside the atmosphere, and the flight resistance is huge. Therefore, the speed performance is relatively average. Most cruise missiles are at the subsonic speed level, such as the "Tomahawk" cruise missile across the sea. The speed is only Mach 0.8.

But its advantage is that it can perform flexible large-overload maneuvers like an airplane, thereby reducing the probability of being intercepted.

The flight principle of a ballistic missile is closer to that of a rocket. After taking off, the ballistic missile will break through the atmosphere and glide for a long distance outside the atmosphere with almost no air resistance. It will not re-enter the atmosphere until it is close to the target and carry out a descent attack.

Therefore, the flight speed of ballistic missiles can easily exceed the upper limit of cruise missiles. However, because the flight trajectory of ballistic missiles is approximately parabolic, it is easy to predict the trajectory, and the risk of interception by the anti-missile system will be greater. This was previously Inevitable injuries.

The main reason for such a flaw is that ballistic missiles have fuel limitations. In order to achieve the greatest possible range, they must strictly follow the parabola.If maneuvering is used to change orbit, a large amount of fuel will be consumed, so that the intercontinental missile may become a long-range missile, and the long-range missile may become a medium-range missile.

Secondly, it is because of imperfect control technology, materials and processes.

It travels through the atmosphere repeatedly and hits the target accurately at the end.It requires superb control methods and extremely high measurement and control accuracy.At the same time, reentry into the atmosphere requires the missile itself to withstand high temperatures.

Therefore, for a long time, the mid-course change of this long-range missile will not be possible.

Of course Wu Tong would not be satisfied with the status quo. If she just wanted to increase the range, she would be able to do it without making any arrangements or switching to N24 high-energy fuel.She is committed to changing this situation, and her talented predecessors have made major breakthroughs, and Qian's ballistics is indispensable.

However, due to the difficulty of using Qian's ballistics, there has been no breakthrough in this area in China. Wu Tong wants to make perfect use of Qian's ballistics on this basis and make a breakthrough in application, so that Qian's ballistics can demonstrate it. What it should be, a shocking and unstoppable brilliant result.

In the previous discussion with Lu Xiao, Wu Tong discovered the waverider warhead design, which is also helping to increase the trajectory change capability of the new ballistic missile and accumulating power for it.

Wu Tong deeply felt that the optimized and innovative design of the warhead alone was not safe enough, so she added a body-assisted design.After careful deduction and simulation, Wu Tong finally settled on the design of boost section separation combined with Qian's ballistics.

After ignition, the missile will quickly drill into the adjacent space, separate the waverider body from the booster section, and maneuver at hypersonic speeds in the dense atmosphere. It can make multiple jumps at the edge of the atmosphere and within the atmosphere, and can also make jumps inside or outside the atmosphere. Large-scale lateral maneuvers change the parabola in the middle into a serpentine maneuver curve that repeatedly travels through the atmosphere and space. The waverider warhead can also automatically evade anti-missile systems and carry out initiation strikes on predetermined targets.

And after the thrusters in the ascending stage of the waverider are separated, it can no longer perform inertial ballistic flight as before. Based on the diffraction of Qian's ballistic trajectory, it can re-enter the atmosphere and start hypersonic gliding. This gliding flight is at the edge of the atmosphere or in the atmosphere. Therefore, for the existing anti-missile system designed mainly to intercept ballistic missile warheads, it will become a difficult target and cannot be intercepted, and the speed of surpassing it will be achieved. Arrives worldwide within hours.

Such a design has extremely high requirements on kinetic energy and materials.However, what Wu Tong is least worried about are these two challenges.For her, the most difficult thing is that she has no direction.

With the guidance of the general direction of the design, Wu Tong continued to conduct public relations deductions on materials. Soon, he finalized the carbon fiber composite materials used to cover the elastic wings and vertical stabilizers, as well as the important heat dissipation structure design, coupled with Wu Tong Upgraded super high temperature resistant coating again.In this way, the heat-resistant material of the entire missile body is ready.

With one hand of protection and material research and development in place, and one hand of guidance and cooling and heat dissipation structure design, Wu Tong has made great use of the two-way front-facing combination.

After getting the materials, the next step is to research the engine.

From fighter jet engines to air-to-air missile engines, Wu Tong has been accumulating in the aerospace engine sector without stopping. In this sector, she can be said to have profound accumulation and is second to none.

Traditional engine fuel restrictions, after the development of N24 super fuel, ejection fuel is no longer restricted. With the same fuel, on the basis of the same range, they have the basis for high consumption in orbit changes.

The scram double pulse compression engine can be further optimized and used on the PL-17, but for the DF-17, it needs to be further simplified to retain the supersonic and fast combustion ramjet kinetic energy. The structure must be simple and there may be no rotating compressor. machine parts to keep propulsion efficiency very high.

Wu Tong listed her needs for the engine one by one. Behind the simple structure, there was a huge challenge in the working principle. Step by step, she drew the blueprint of the engine she needed and gradually completed the filling. Her eyes were shining. A clear way forward.

In conventional turbojet engines, when the flame burns in the combustion chamber, the speed is subsonic. However, the flame of the new scramjet engine burns at hypersonic speed in the combustion chamber, making ignition very difficult.The difficulty is equivalent to striking a match in a Category 12 typhoon.

The oxygen in the atmosphere can be used as the oxidant, and only the fuel needs to be carried to increase the propulsion efficiency, which is expected to be more than four times higher than rocket propulsion.

In this way, when flying in the atmosphere, the aerodynamic control surface can provide control torque, allowing the missile to change its target during flight.

The aerodynamic control surface is another key section!
This is also the key to achieving the combination of ballistic missiles and cruise missiles, allowing the DF-17 to achieve the combination of the two, which not only has the orbit-changing ability of cruise missiles, but also has the super-speed requirements of ballistic missiles.The scramjet engine plus super fuel gives the new DF-17 super power, which is the greatest prerequisite for supporting power and fuel requirements for maneuverable orbit changes.

The entire research and development process, for Wu Tong, is a game of breakthrough. Old problems are solved and new problems are born. Pass through each obstacle one by one and assemble it into a whole, which ultimately leads to the door to success. The reward is the successful birth of the results. . (End of chapter)