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I Pioneered Scientific Magic - Chapter 529
🕑 Added 2024-05-01 15:26:20 +0000 UTCChapter 529: Let's set a small goal first—to break the five times the speed of sound!
"How's my research going, Vice Chancellor Tim?" Dennis, after being excited for a while, turned his head to look at Tim, who was stunned.
The latter was at a loss for words, not expecting Dennis’s outrageous explosive propulsion theory to actually work, and could only smile bitterly to admit that he was wrong and that the institute would indeed send more people to support his research.
Seeing Tim finally conceding, Dennis also felt a sense of vindication.
During the year he spent researching the explosive propulsion device, he had endured mockery from those ignorant people, especially when his research hit a bottleneck, the Magic Research Institute even refused to send more alchemists to assist him.
On one hand, the kingdom was short of people everywhere, and on the other hand, many short-sighted grand wizards thought his explosive propulsion plan was too crazy, with no chance of success, just a waste of time and resources!
This was also why Dennis helplessly brought Lydia and others to assist him. These halflings might not know magic, but they were strong and had a good knack for engineering, always handy in doing odd jobs or assembling devices.
"Too bad, it’s a bit late; if it could be completed before this year's academic conference, it would have been perfect!" Dennis said regretfully.
Otherwise, his research would surely have earned him a Morning Star Medal!
"It’s not too late, by the time you perfect the jet fighter, just in time for next year’s academic conference," Lynn said with a smile, then looked at the now red-hot, slightly melting but still emitting streams of fire, the propulsion device, and reminded.
"Master Dennis, have you ever thought about changing the internal structure of the propulsion device to further increase the speed of the air jets..."
Since Dennis had already created a prototype of the jet propulsion device, Lynn no longer held back.
A jet plane, 700 kilometers per hour—how is that enough?
Even three times, five times the speed of sound is just a start!
You know, they are preparing for an interdimensional war this time, and it’s not too much to overestimate the enemy; they must give their all and make as many preparations as possible.
A supersonic fighter, in terms of speed, is already not much less than a legendary wizard. If it could also be equipped with an indestructible flame or even a mini fusion bomb device, it could pose a significant threat to legends.
Increase further? The wizards present looked at Lynn with strange eyes, and Tim was completely dumbfounded; to him, 700 kilometers per hour was already a terrifying speed, enough to traverse the empire several times in a day.
But Dennis was extremely excited. Of course, he had considered speeding up by changing the shape of the air chamber. In fact, he had already done many experiments.
For example, the third air chamber of the propulsion device had been modified by him to maximize the high-temperature, high-speed airflow from a hydrogen-oxygen explosion, greatly reducing the likelihood of explosions.
To make it clearer to Lynn, Dennis walked up, stopped the propulsion device, and dismantled it, explaining the internal structure design in order.
Although each structural improvement was the result of dozens or hundreds of experiments, in front of this star of magic, Dennis had no intention of hiding anything, from design concepts to problems encountered in actual applications.
After all, Lynn was very generous from the beginning, directly giving him the internal combustion engine blueprints for his own research, and Dennis didn't think the other party would do anything to steal the magic research results.
After listening to Dennis's explanation, Lynn pondered for a moment, then quickly spoke up.
"Your design of a three-chamber structure is very good, using the properties of highly pure hydrogen and oxygen that can't be ignited alone to block the backflow of high-temperature gases produced by combustion, but this isn’t safe enough..."
"I suggest you can add a step to compress the gases in the front half of the third chamber, not only to further increase the power provided by the gas combustion during ejection but also to create a pressure difference between the front and back, becoming a second safety measure..."
Lynn combined the design principles of jet turbine engines to explain to Dennis how to compress the manufactured gas multiple times using rotating and fixed blades arranged in a V-shape, and feed it into the combustion chamber.
"But, won't this make the propulsion device even more dangerous?" Tim couldn't help but interrupt; he felt that this star of magic was coming up with some bad ideas.
The previous multiple explosions of the propulsion device were due to the high-temperature gas flow produced by the hydrogen-oxygen combustion reaction being too strong, directly blasting through the air chamber. If the density of the gas is increased again, although the thrust produced during combustion will be stronger, the likelihood of accidents will also be higher.
"That's because the steel used to make it has poor
pressure resistance and heat resistance. If you replace the key parts with stronger alloys or mithril, this level of pressure is nothing," Lynn shook his head, picked up the blueprints on the table, started drawing, and continued speaking.
"Also, Master Dennis, the cooling of your propulsion device is also a big problem, I suggest designing the combustion chamber as an embedded structure, opening a few ventilation ports, and directly using the high-speed airflow around the fighter during flight to cool it down."
"Brilliant, what a fantastic idea..." Dennis was excited; he was originally planning to fill the outside of the combustion chamber with a low-temperature liquid to achieve a cooling effect, but Lynn's design was obviously more energy-efficient, as the wind came directly from the airflow during the flight.
Lynn drew many ideas into the improved design, and the propulsion device that came out after several modifications was simply like a patchwork monster.
But as long as it's useful and efficient, that's fine!
How convenient, that’s how it comes!
"Why does this propulsion device look so strange?" Dennis glanced at Lynn's improved blueprints and asked in confusion.
That model looked like two funnels placed end to end, then joined at the narrow points.
"This is what I've recently researched, the most fluid-dynamically efficient structure, and I expect that doubling the flow rate of gases and liquids through the tube should be no problem!" Lynn's lips curled up in a slight smile, explaining that this structure was the famous de Laval nozzle, also known as the supersonic nozzle.
Dennis looked at the blueprint and couldn't help furrowing his brow. He believed in speeding up by optimizing the structure of the propulsion device tubes, but just changing one structure to double the original speed seemed a bit too exaggerated.
You know, his explosive propulsion device originally could reach a speed of 700 kilometers per hour, and after the step of compressing the gas, its speed would only be faster!
To continue doubling that speed on such a basis—what kind of concept was that?
Dennis found it hard to imagine and couldn't see what was so special about this trumpet-shaped structure that it could have such a significant effect.
"Whether it works or not, just try it and you'll know," Lynn said with a smile; he was also curious about what kind of performance this patchwork propulsion device could ultimately achieve.
Dennis nodded, not wasting words, rolled up his sleeves, and immediately began the work of improving the propulsion device.
Lynn wasn't idle either, personally responsible for making the pressure-resistant third air chamber, even calling over the idle Tim.
The grand wizard possessed atomic-level control abilities, able to manipulate, analyze, and mimic nearly every element except for special ones, and in engineering, this could only be described as efficient.
Even with the engraving of alchemy arrays, the modification work on the new-style propulsion device was completed within two hours.
Then it was time for the experiment!
A group of alchemists and halflings like Darren immediately retreated to a safe area, perhaps because they were involved in the making, Tim didn't have such a big psychological barrier this time.
Dennis solemnly placed his hand on the magic transmission device, and as the magic quickly flowed in, the propulsion device was reactivated.
A huge booming sound soon rang in everyone's ears, followed by a red tail flame blasting out from the rear nozzle of the propulsion device.
The platform used to stabilize the propulsion device kept vibrating, and if Lynn hadn't specially reinforced it, the propulsion device would probably have flown out at that moment!
"Such a strong tail flame..." Dennis said in surprise; the high-temperature flames blasting out from the nozzle were gathered into a two-meter-long jet of flame, even longer than the propulsion device itself!
Even with the naked eye, he could see that the thrust provided by this thing was several grades higher than before.
Under the watchful eyes of everyone, the scales on the thrust detection device also kept climbing...
Six hundred, seven hundred, eight hundred, nine hundred... and then it stopped moving.
"Master Dennis, it has probably exceeded our detection limit!" one of the alchemists said in fear.
This meant that the maximum speed of the jet stream exceeded one thousand kilometers per hour!
After tens of seconds of accumulating speed, the shape of the high-temperature gas stream blasting out from the nozzle changed again, with the part of the flame near the nozzle slightly indented inward, this area's flame stream far brighter than the rest, forming a ring, slightly trembling...
Lynn took the initiative to explain before anyone asked. "This is the sonic ring, indicating that the jet stream's ejection speed has surpassed the speed of sound!"
The pressure of a supersonic airstream is very high, so when it is ejected from the nozzle into the air, it will rapidly expand, but after expansion, the pressure of the airstream will be noticeably lower than atmospheric pressure, therefore it will be compressed again.
In this way, the sup
ersonic airstream will oscillate between expansion and compression, forming expansion waves and compression waves in this process. When these two meet and overlap during propagation, they form the rings on the tail flame of the propulsion device, also known as sonic rings or Mach rings!
Due to the steam formed by the combustion of hydrogen and oxygen raising the humidity of the nearby air, this colorful sonic ring looks particularly obvious.
"Seeing a ring represents one times the speed of sound!" Lynn looked at the continuously surging tail flame; the second sonic ring did not emerge. "Too bad, it still didn't reach twice the speed of sound, but I think it should be very close..."
According to his expectations, after the step of gas compression, the high-temperature gas stream should reach subsonic speed before entering the de Laval nozzle, and after the two accelerations before and after the de Laval nozzle, it should reach around twice the speed of sound, only to unfortunately fall short in the end.
"Chairman Lynn, do you mean that the speed of the high-temperature gas jet now exceeds two thousand kilometers per hour?" Tim said incredulously.
The speed of sound transmission varies slightly depending on air pressure and temperature but averages about three hundred forty meters per second, or about twelve hundred kilometers per hour!
And approaching twice the speed of sound also means exceeding two thousand kilometers per hour...
Tim smacked his lips; what kind of monster were they creating?
Even Dennis was somewhat incredulous; even though he had guessed that after their modifications, the propulsion device's power would definitely undergo a qualitative improvement, he hadn't expected it to be this fast.
"Chairman Lynn, can you fly that fast?" Lydia curiously asked.
"Not yet..." Lynn shook his head; his flying speed was about one and a half times the speed of sound.
"Doesn't that mean that as long as I'm flying this fighter, even legendary wizards won't be able to catch up with me?" Lydia said with anticipation.
"That's hard to say." Lynn laughed, not to make Lydia overly confident, and poured cold water on her. "Some magics are very fast, like my electromagnetic railgun, which can reach over twenty times the speed of sound, and if it's a laser beam, you probably won't even have a chance to dodge."
Lydia thought about herself piloting the fighter, targeted by several laser beams, and suddenly shrank her neck.
Lynn then had Dennis stop the operation of the propulsion device, disassemble it again to find out exactly what was affecting the speed of the airflow reaching the limit, and continued to improve the internal structure.
"More changes?" Tim's mouth twitched involuntarily, the fast speed gave him a sense of fear, completely beyond his imagination.
In the past, the speed of sound was a realm that only legends could reach, meaning breaking the sound barrier, breaking through natural limits.
In his view, this speed was already fast enough!
"It's just close to twice the speed of sound, still far from reaching the jet propulsion device's limit!" Lynn said with a smile.
For a jet fighter, three times the speed of sound isn't much, five times the speed of sound is acceptable, and ten times the speed of sound can be considered up to par...
"Besides, the shape of the fighter also needs to be further optimized. The concept of supersonic and subsonic speeds are completely different; a high-speed flying fighter will drive the surrounding air to flow faster, compressing the gas, forming a shock wave at the front of the plane..."
Lynn explained to Dennis the various obstacles encountered by a fighter during high-speed flight and drew out the design blueprints for a simple wind tunnel to simulate the airflow state during supersonic flight.
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