Chapter 1507 You never know what kind of help a newly employed graduate student can get

Five minutes later, Guo Chunyu finally said goodbye and left the bridge.

"History will remember every detail of us..."

As he walked down the gangway, he repeated something the captain had said earlier.

In principle, the absence of actual ship airflow field measurement results will not affect the arrangements for carrier-based aircraft take-off and landing tests.

But because of this sentence, Guo Chunyu decided to do something.

Of course, decisions are decisions.

In fact, he knew very well in his heart that if he wanted to shorten the work originally scheduled for more than a month to within a week, it would definitely not be a goal that could be achieved by simply using more computing power.

Some new theories are needed.

That's why Guo Chunyu didn't dare to say anything final when he was in the bridge just now.

Fortunately, he has thought of a possible solution.

As soon as he walked out of the island, the strong sea breeze immediately messed up Comrade Lao Guo’s remaining hair.

However, at this critical moment, he had no time to take care of himself. He just put on his hat hastily, tightened his cotton coat, and walked towards the flight deck.

In the distance, technicians were checking the whip sensors, recording initial data.

He took a deep breath of the salty smell of the sea breeze, and his eyes swept back and forth over the figures that looked like copies and pastes, and finally stopped at a young engineer with thick hair not far away.

A researcher who has just joined the team, Dr. Shi Wenqiang.

Guo Chunyu quickened his pace and approached, where the latter was concentrating on adjusting the sensitivity of an anemometer.

"Xiao Shi." Guo Chunyu patted the young man on the shoulder.

The latter turned around and was shocked to find that the person who came was actually his immediate superior and the highest person in charge of the entire project.

The young man immediately stood at attention:

"Director Guo!"

Guo Chunyu waved his hand: "Don't be so nervous... Just continue working and don't worry about me."

He waited until Shi Wenqiang finished the task at hand before he approached him again.

This time I also brought a thermos cup filled with hot water.

The young man, who had just started working, had never seen such a scene before and was flattered for a moment.

At this time, Guo Chunyu finally lowered his voice and asked:

"Xiao Shi, I remember... your doctoral supervisor seemed to be... Academician Chang Haonan?"

Shi Wenqiang opened his mouth while holding the thermos cup, and after a while he answered:

"I did study for my PhD at Torch Lab, but it was under the name of another teacher..."

"That's fine!" Guo Chunyu's eyes lit up. "Can you contact Academician Chang and ask him to help solve a theoretical calculation problem?"

Faced with this request, Shi Wenqiang seemed a little hesitant:

"I'm afraid Academician Chang is very busy... But if our project requires his help, or the Torch Laboratory's help, we can go through a cooperation application process. As long as the importance is high enough, we will generally get a response."

Seeing that things were going well, Guo Chunyu quickly struck while the iron was hot:

"Don't worry, I will follow all the necessary procedures and steps, but there is an emergency right now and I need to get on the bus first and buy the ticket later, otherwise it will definitely be too late..."

He then briefly described the news that the fleet might conduct carrier-based aircraft tests ahead of schedule, and finally said solemnly:

"I need you to contact Academician Chang immediately after returning to port to see if you can give us some guidance on the theoretical calculation of the airflow field on the aircraft carrier deck. This is related to the safety of the first takeoff and landing of our country's aircraft carrier-based aircraft."

They will follow the Liao Province for a long time and maintain military management throughout the process, so the navigation plan does not need to be kept secret from team members.

"Okay, I'll give it a try..."

Looking at his leader's anxious eyes, Shi Wenqiang finally nodded:

"But I'm just an ordinary student from the Torch Laboratory. I can't guarantee that Academician Chang will agree..."

……

A few days later, Huairou Science City.

Chang Haonan was sitting in his office, checking the test flight data of the Wuzhen-8B program on the computer screen.

In the two rounds of test flights conducted a week ago, the subsonic ramjet engine of Plan B demonstrated performance that met the design indicators, and it was generally a very successful test.

More importantly, the magnetohydrodynamic power generation module installed at the engine's air intake also started successfully, driving the synthetic aperture radar in the payload bay to take the first clear high-altitude reconnaissance photo, while also providing them with a lot of long-term flight data that was difficult to obtain relying solely on a wind tunnel.

"Academician Chang."

Xing Muchun appeared at the door of the office.

Chang Haonan nodded and motioned for the other party to come in.

"This is a comparative report on the magnetohydrodynamic power generation efficiency of the left and right engines." Xing Muchun put a document on the table. "According to the calculation results, the power generation efficiency of the left engine is 1.35 times that of the right engine, which is qualitatively in line with our expectations."

The Wuzhen 8B plan uses two Yarush-2 ramjet engines as power. When manufacturing the first prototype, they specially installed magnetohydrodynamic power generation channels of different specifications on the engines on the left and right sides.

Specifically, there are 10 groups of electrodes arranged in the magnetohydrodynamic power generation channel of the left engine, while there are only 6 groups on the right side.

Chang Haonan took the report and quickly scanned the densely packed numbers and charts:

"It seems that the increase in the number of electrodes does offset the effects of the end effect and the Hall effect..."

Having said that, he flipped back two pages of the report in his hand before continuing:

"Moreover, this offsetting effect seems to increase with the increase of speed, but..."

"It's a pity that the maximum speed of the Wuzhen 8 can't reach Mach 5." Xing Muchun continued, "To verify the effect of hypersonic speed in a larger range, I'm afraid we have to wait until the real hypersonic verification aircraft is released."

Chang Haonan heard the regret in the other party's tone and comforted him:

"Hypersonic aircraft is, after all, a groundbreaking technology... It is destined to be impossible to achieve overnight."

Then he put the report back on the table:

"At this stage, it is already a major progress to confirm that increasing the number of electrodes can help maintain the power generation." He turned the screen to Xing Muchun and pointed to a data point on it. "Also look here. When the speed increases from Mach 3 to Mach 4.5, the compression efficiency of the prototype on the incoming flow increases by nearly 55%. This shows that our theoretical model of parallel waveriders is correct."

The topic was indeed quite jumpy, so much so that it took Xing Muchun about half a second to get his drift:

"So, you have a plan for the next step?"

"Two directions." Chang Haonan held up two fingers. "One is to continue to promote the development of air-breathing hypersonic missiles. I will personally take charge of this. The second is to use the flight data of Plan B to try to establish a working cycle model of a ramjet engine combined with magnetohydrodynamic power generation to lay the foundation for future research and development work."

He cast his eyes to the work schedule on the corner of the table:

"Let System Department 3 be in charge of this part and report the progress to me every two weeks... Also, remember to remind them that building a theoretical model is a long-term task and not to be impatient."

While the two were discussing, the phone in the office suddenly rang.

Seeing this, Xing Muchun prepared to go out to avoid it, but Chang Haonan glanced at the caller ID and found that the call was from Torch Laboratory, so he signaled the other party to stay.

"Teacher, I'm Li Yabo."

A familiar voice came from the other end of the receiver.

"Abo?"

Chang Haonan was a little confused and confirmed that today was neither a group meeting day nor a reimbursement day:

"In a hurry?"

Li Yabo also knew his mentor's style, so he got straight to the point:

"Teacher, there was a doctor named Shi Wenqiang who graduated from our research group two years ago. Do you still remember him?"

The scale of the Torch Laboratory is now quite impressive, but the core research team led by Chang Haonan still maintains a relatively refined size, so he only needs to recall it briefly to find the result:

"A PhD student from Bingcheng University of Technology, studying large-scale airflow simulation and evaluation?"

After confirming that Chang Haonan still had an impression of this person, Li Yabo continued:

"Shi Wenqiang contacted me today and said that they need to urgently calculate the surface airflow field of a large full-deck ship. However, the measured characteristic length exceeds 300 meters, and the corresponding calculation domain length reaches 15000 meters. The amount of meshing and calculation is very large, and it is difficult to complete it in a short time. Therefore, I hope to get your help."

A 300-meter-long "large full-deck ship".

The only thing missing was reporting his ID number.

After hearing this, Chang Haonan pondered for a few seconds:

"I do have some methods to increase the accuracy of the analytical solution of the NS equations, thereby reducing the amount of calculations for the flow around a cylinder problem, but they have only been applied at relatively high speeds... At the typical speed of 30 knots for surface ships, the boundary layer characteristics are different from those of aviation problems, so they cannot be directly applied."

He originally wanted to ask the other party to send him the data, but when he thought about the size of the "large full-deck ship", he felt that it might be better for him to go there himself.

As the saying goes, the fastest way to transmit information in the world is a heavy truck full of hard drives speeding on the highway.

So he turned and asked:

"Have they started the cooperation application process?"

There was silence for a while on the other end of the phone, and it seemed like he was asking the other party a question.

Ten seconds later, Li Yabo replied:

"We have submitted the application, but as you know, this kind of project... it will take some time to go through various approvals."

"It doesn't matter. Just say hello to the navy and tell them that I'm going to Lianhai in person..."