In the field of aerospace, liquid fuel is more commonly used, while solid fuel is generally used in catapults.
This is mainly related to the characteristics of the two fuels. Liquid fuel is cheap, has a high specific impulse, can finely control the output power, and has a relatively complex engine structure.
Solid fuel is easy to store and has great strength, allowing rockets or missiles to be stored for a long time before launch and transported in a flexible manner, and the engine structure is simple.
Specific impulse represents the propulsion efficiency of a rocket, measured in seconds, the duration for each kilogram of fuel to produce one kilogram of thrust.
Between the two, the advantages of one are the disadvantages of the other.
It is known as a high-specific impulse liquid fuel. The current highest specific impulse data is contributed by liquid oxygen, which is only 457. The nitrogen tetroxide + unsymmetrical dimethylhydrazine commonly used in the domestic Long March series generally has a specific impulse of only about 348.
Although the specific impulse and thrust of solid fuel are somewhat unsatisfactory, it has greater thrust, is easy to launch, and has low cost. As the market for small and micro satellites becomes increasingly broad, China often conducts regular launches. These advantages are very attractive when used in the launch of small spacecraft.
Wu Tong decided from the very beginning that a solid-state engine would be more suitable. However, using a solid-state engine has the highest cost-effectiveness and stronger thrust. However, in order to achieve the desired effect, some shortcomings of solid fuel need to be optimized, or in other words, a new high-energy solid fuel that is different from the general solid fuels on the market needs to be designed and developed.
CO, H2, C2H2, CH4, C2H4, CH3CH2OH, N2H4
····A series of chemical symbols passed through Wu Tong's pen and condensed on the draft paper in her hand.
The fuel currently used in solid rocket engines is mostly high-grade borosilicate, and the oxidizer is nitrogen tetroxide (N2O4), liquid oxygen (O2) or hydrogen peroxide (H2O2).
Liquid oxygen can be used as fuel, alcohol and methane can be used as fuel, but what about nitrogen... It accounts for about four-fifths of the air. Does it have any value in use?
N, N2···N16···N18····All nitrogen molecules, a popular high-energy material section emerged from Wu Tong's mind, all nitrogen ion salt?
Theoretically, the energy of all-nitrogen substances is very high, reaching 100,000 to 1 million joules per gram most of the time. This energy level is equivalent to 10 times or even 100 times that of traditional TNT explosives.
The absolute direction told her that this unexpected inspiration was a pleasant surprise.
N18, N24... these two complement each other and are the direction to move forward. We can obtain a passivated high-energy material that can be used as explosives. The power should be ten times that of ordinary TNT. The base N18 also has its own wonderful effects.
Did I accidentally create something dangerous? The fleeting thought was quickly ignored by Wu Tong, who was immersed in his thoughts. This substance had more than one use.
The other is Wu Tong’s original intention for developing it, which is to use it to make solid rockets and missile fuels.
Nitrogen is not reactive. Under targeted storage conditions, all-nitrogen compounds have relatively stable performance and can produce tremendous power even with a small amount. This means that this new material can be used as fuel with high specific impulse and light volume. Once the preparation process matures, the price will not be expensive and the cost-effectiveness is very high.
If you count the advantages, it is what she needs, it has the advantages of both solid and liquid fuels, avoids the disadvantages of conventional solid fuel, and is perfect for helping rockets go into space.
How to prepare the application?
Filtration? Sedimentation? Vapor deposition?
Wu Tong suddenly thought of his insights from the last deduction of the co-bond effect.
Can polyoxygen reduction be prepared through reduction?
It seemed to have hit a key point, and it also seemed to be a similar idea. Sparks spread across Wu Tong's mind like a prairie fire. In an instant, Wu Tong's mind was enlightened, and his thoughts expanded completely.
Silica, silicon monoxide (SiO), silicon dioxide (SiO2)·······
Listing the chemical formulas one by one and judging by the absolute direction, the best choice is Sio6, silicon hexaoxide.
Through a special co-bonding effect, it is combined into a special hexagonal molecule, which is more appropriately called polygonal silicon oxide.
The data was transformed into a deductive model by Wu Tong, and as the judgment data was filled in one by one, Wu Tong determined that hexagonal silicon oxide best met the current needs for the preparation of all-nitrogen compounds.
How to prepare and use this special silicon oxide to achieve the desired separation effect? The question was raised, and the currently known materials swept through Wu Tong's mind like a storm.
Finally, among the currently available material preparation methods, Wu Tong determined the preparation direction, wrote a series of molecular formulas on the draft paper, and drew the atomic formula of the determination material.
The hybrid-connected carbon atoms are tightly stacked into a single-layer two-dimensional honeycomb lattice knot with a typical hexagonal structure and a honeycomb architectural aesthetic.
Graphene-(CH)n--COOH-COOH--HOOC-HO···
Graphene, a revolutionary new material of the future, is currently a hot topic in the field of physical chemistry. Using a vapor deposition process, a special hexagonal silicon oxide is combined with a graphene film to form a special filter membrane.
She also needs to build a special equipment, which must have a gas pipeline, a filter device, a vacuum pump, a pressure difference throughout the preparation process, a sealed workshop with a purity of over 100,000, and no visible light...
Wu Tong deduced and determined each preparation condition, and the preparation process standards gradually took shape.
After completing the preparation infrastructure, Wu Tong began to deduce the preparation process. The preparation process for the materials, according to the types she imagined would be used, from broad categories to detailed ones, step by step, Wu Tong used the screening method to the extreme, repeatedly screening, deducing and calculating, and using mathematical models to assist in deducing the directional data needed to achieve the corresponding results under special conditions...
By combining various abilities, Wu Tong selected the step parameters required for the preparation process.
Pressurization, pressurization parameters, vacuum pressure difference, specific current and voltage, and the special effect of electrifying hexagonal silicon oxide. Under this special effect, the synthesis from gas to solid...
Step by step, a groundbreaking new chain of high-energy molecular materials emerged from Wu Tong's pen.
After the final process was completed, Wu Tong gradually came out of his deep research state with no distractions.
At this moment, seeing what she had made, Wu Tong suddenly realized that what she had made this time was a little bit extraordinary!
This time she had a burst of inspiration and seemed to have come up with an incredible chain of reaction materials.
At first, she just wanted to research a better solid fuel as the power source for her newly designed scramjic dual pulse compression engine.
As she continued to study, she suddenly had an epiphany, which resonated with the special molecular formula she had previously derived under the co-bond effect, and she derived a new and special all-nitrogen compound N18.
This special all-nitrogen compound is an allotrope of nitrogen.
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