The team that came to Blue Sky Heavy Industries to help was Academician Lavoie, the secondary academician of the Caroline Lavoie formula.
Lava does not have as good a creative talent as Caroline, but when it comes to mathematics, he is also one of the top academicians of the institute.
Blue Sky Heavy Industries is an emerging key enterprise. After the floating island took off, it is taking on more and more heavy tasks. Caroline is doing basic research in the hospital, and Lava was pulled out of the bed by the dean and thrust here to help.
Although Lantian belongs to Nanzhen, its area is larger than the whole of Nanzhen. It also has its own sacred tree. It and Nanzhen's sacred tree are the raw materials for the wooden man series aircraft. The Sacred Tree itself is also an office building. The nearest ones are two airframe assembly workshops. Next to them are several machine tool workshops that provide parts. There is an airstrip in the middle. Opposite is the engine department and power plant where Lava is... Yes, This is a company with its own power plant, which is mainly used to protect the wind tunnel test site next to the engine department.
For such a big factory, there are only 10,000 people, so we are a bit weak.
Lava didn't care about that. After coming to Blue Sky Heavy Industry and joining the engine research and development project team, his interest was aroused.
They are working on the turboprop engine that His Highness Li Xiang mentioned in his aerodynamics class.
The body of this thing is actually a turbojet, but compared with the propeller, the power of this jet turbine only accounts for a small portion.
The difficulty in development lies in materials and electricity.
The corresponding operating temperatures of steam turbines, gas turbines, and jet turbines are 400 degrees, 800 to 1200 degrees, and 1200 to 1500 degrees respectively.
The gas turbine was skipped because the thermal efficiency of this thing is not as good as that of a steam turbine. The power plant is not willing to use it, and it is not needed elsewhere. For shipbuilding, the kingdom is not close to the sea.
Without the accumulation of intermediate-level technology, the research and development process of jet turbines relies entirely on Blue Sky Heavy Industries itself. Although there is cooperation from other manufacturers, the effect is limited.
Harsh working conditions place extremely high demands on materials. In principle, niobium-tungsten alloy is needed to meet the long-term working requirements of top-level high-temperature combustion chambers.
Obviously, there is no mass production of niobium, and even if there is an alchemy studio that can provide a small amount, it is not enough to support steel mills in developing new products.
There were no good materials, so a team of academicians was invited to help provide a temperature control solution. At the same time, the team from Blue Sky Heavy Industry also tried to lower the temperature of the combustion chamber.
There are many contradictions in it. The higher the temperature, the greater the air pressure provided by the same amount of gas, and the more powerful power it can bring. Cooling down is somewhat contrary to the power goal.
So the pressure was put on the Lava team. The best solution was to use limited magic power to maintain the strength of the material without cooling down. If you really can't do it, use the magic array to do the water cooling work.
The temperature is still too high and the power is too high. If it is really water-cooled, it will explode at any time. Magic can do non-contact cooling, which can better protect the safety of the functional parts.
The electric part mainly refers to the starting section.
The jet turbine requires the turbine to be started first, and the turbine inhales air to pressurize the combustion chamber. When a certain air pressure is reached, the fuel is then ignited. Direct ignition cannot start without enough oxygen.
The work of Lava's team went relatively smoothly, because there are indeed many means in magic to prevent high temperatures. After calculating the energy consumption ratio and jet turbine structure, they decided to use the "shield" type.
Its essence is similar to a magic shield. It attaches a layer of cold air to the body surface to block the flames from directly burning the body.
The same is true in a jet turbine. As long as a solid, stagnant air boundary layer is maintained close to the metal wall in the rear part of the main combustion chamber, and the cooling effect brought by the outer bypass gas to the metal wall is used, it will Can maintain thermal balance.
To be more specific, for example, divide one centimeter thick air into three layers.
The innermost side is affected by the temperature of the combustion chamber and will reach more than 1400 degrees. The middle layer is affected by both internal and external influences, and the temperature is only 1200 degrees. The outer layer is mainly affected by the metal wall, and the metal wall will always be cooled by the wind from the outer duct, ensuring a lower temperature.
In short, the extremely poor thermal conductivity of air is used to protect the outer wall of the combustion chamber.
Specifically, how thick the air layer should be maintained, the impact of the air layer on the combustion chamber effect, whether the shape of the combustion chamber needs to be changed, etc., are all detailed work. Just check a little bit and keep communicating with other teams in a timely manner to advance. .
In addition to the academician himself, the academician's team also includes several junior academicians and new researchers. There are eight people in Lava's team. As long as the direction is set, Lava does not need to do much of the work himself.
He also took the time to study a purely magical solution for a jet turbine.
A turboprop uses a turbine to drive the forward propeller. The aerodynamic force is still inclined to propeller power. The propeller pulls the aircraft forward, and the turbine exhaust provides a certain amount of additional thrust.
Ignoring the propeller part for the time being, the essence of a jet turbine is the process of gas deceleration and pressurization - heating and expansion - fuel is converted into additional gas - and the cold flow is ejected from the mixed outer duct. Heat is only a factor that pressurizes the gas, not working principle.
Can we use magic to directly vaporize water and mix it to flow to achieve the same effect?
As long as you do a simple calculation, you will know that the answer is - yes!
Magic has limited efficiency in stabilizing mechanical energy, but it is very good at creating "changes". It does not even need to turn water into water vapor, but directly separates it into hydrogen and oxygen. The energy consumption is not much higher, and you can get additional benefits by igniting it. The thermal boosting effect prevents water vapor from condensing in the wake section and causing pressure reduction.
But when doing specific calculations, Rava found that there were still difficulties and weird ones.
The air pressure at the rear is too high and the temperature is too high, and the existing turbine cannot withstand it at all.
If magic is used to condense the gaseous turbine slurry, the entire magic system will be too complicated, making mass production almost impossible. Magic arrays of this complexity are generally only used on production equipment required by heavy industry to achieve maximum utilization. No matter how powerful a single engine is, can it be comparable to a heavy machine tool?
Of course, if His Majesty needs a special plane for travel, you can consider it.
After doing a lot of work, on the way to see the progress of the team members, I saw the engine development sequence promotional diagram on the wall of the engine factory, and suddenly realized that the problem was still complicated.
If you use water to make a pure magic jet, there is no need to use a turbine!
The turbine has only one function, rectification.
The high-speed incoming flow turns into medium-speed and high-pressure, and then to the high-speed and high-pressure in the wake. This is the effect of the duct shape and combustion, and has nothing to do with the turbine itself.
The result of non-rectification is poor fuel mixing ratio, insufficient combustion, and thrust flow deformation.
As long as the fuel-to-mass-thrust ratio does not decrease, whether or not there is a turbine does not actually affect its use, right? Moreover, the jet engine structure is simpler and the maintenance difficulty is much lower.
A hydrodynamic jet engine should have application prospects.
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