my scientific age

Chapter 237 Nanchang Large Wind Tunnel!

In front of the cabin door, an air force colonel in charge of reception was standing, facing Feng Karmen with a respectful face.

Feng Kamen smiled at the air force colonel, nodded, and looked around at the scene, looking at the grand and modern Nanyuan Airport, a flash of reminiscence in his eyes, it has been eight years since he last came to Peiping, China. , This is his second trip to China.

The last time I came, the scale and infrastructure of Nanyuan Airport had not reached this level.

The runway of the airport is simple, or hard surface, and the infrastructure such as the terminal building is not available. In the past eight years, the runway of Nanyuan Airport has become a cement road, and it has a large-scale terminal building and other infrastructure.

This is progress.

Admirable progress.

After stopping to observe, Feng Kamen suddenly saw a figure standing on the apron below, and his eyes suddenly lit up without delay.

Coming to the ground, Feng Kamen stepped forward quickly and walked towards the reception crowd.

Here, in the crowd, a young man with blue eyes and glasses also left the team and came towards Feng Kamen.

"Wardund, I didn't expect you to be here."

"Teacher, of course I will be here, long time no see."

Feng Kamen and Waldunde both stayed in the middle, with bright and comfortable smiles on their faces, repeated polite hugs like old friends they hadn't seen for a long time, and extended their sincerest greetings,
For von Karman, Frank Waldund was his first American graduate student, his closest student, his most capable colleague and his most trusted assistant.

The relationship between the two is also a teacher and a friend, and they always go hand in hand at work. Whenever they see Feng Kamen, they cannot do without Walden.

"How is the big guy you're building?" After hugging and greeting, Feng Kamen stepped back and asked Waldunde.

Last year, after being recommended and introduced by Feng Kamen, Waldunde came to Peiping, China and became a professor of aerodynamics at National Tsinghua University, and then proposed to Tsinghua University to build the largest large-scale wind tunnel in the Far East for the research and development of new aircraft. test.

Subsequently, with the approval of Tsinghua University, the National Tsinghua University Institute of Aeronautics was established. Professor Gu Yuxiu, Dean of the School of Engineering, served as the director, Professor Zhuang Qianding, the director of the Department of Mechanical Engineering, served as the deputy director, and Dr. Hua Dunde served as the most critical professor of aerodynamics. , the trio presided over and designed the state-of-the-art 15-foot wind tunnel in the Far East.

15 feet, about 4.572 meters in diameter.

At present, the entire large-scale wind tunnel project is being constructed in secret in Nanchang. Once completed, the large-scale wind tunnel in Nanchang will completely surpass the wind tunnels manufactured by the Japanese aviation industry and become the first in the Far East and the world's advanced level.

The importance of the wind tunnel is self-evident. It is the most basic and important tool for studying aerodynamics. Any aircraft that wants to transition from the drawing to the real stage must go through wind tunnel experiments to obtain relevant data.

And this is the big guy in Feng Ka's door.

As a professor of aerodynamics at the National Tsing Hua University, Dr. Waldund has a very luxurious resume. He graduated from the Department of Aeronautics of the Massachusetts Institute of Technology. In 1926, he studied turbulence with Prandtl in Göttingen. In 1927, he received his Ph.D. from the California Institute of Technology, focusing on wind tunnels and flight experiments.

This is a top genius in the field of wind tunnels, and it is inseparable from this situation that Walden can become the most capable colleague of Von Kamen.

"The Nanchang wind tunnel project is nearing completion, and it will be completed in about three months." Hua Dunde did not hide it from Feng Kamen, and told the truth about the progress of the entire project, smiling: "Teacher, you will be able to do it soon. see it."

"Then I have to look forward to it. The diameter of this wind tunnel designed and built by you is more than 50% larger than that of the wind tunnel at our California Institute of Technology." Feng Karmen heard this and showed a look of anticipation in his heart: "The experimental section What is the range of Mach numbers for airflow?"

"The internal structure is a recirculation wind tunnel design, using a three-stage pressurized axial flow fan. The air flow Mach number range in the test section is estimated to be about 0.4M-0.6M, which can meet the maximum speed of 489 kilometers per hour to 734 kilometers. Hole test," Waldund responded.

"If the Nanchang large-scale wind tunnel passes the completion test performance, it is indeed one of the most advanced large-scale wind tunnels in the world. Waldunde, you are indeed a genius in wind tunnel research and development." Feng Kamen heard Waldunde's suggestion. He answered, he already had a specific concept in his mind, and sighed softly.

The performance of the large-scale wind tunnel in Nanchang is undoubtedly top-notch. The diameter is 50% larger than that of the wind tunnel made by the California Institute of Technology. The Mach number index of the air flow in the test section, which determines the most important performance of the wind tunnel, is as high as 0.4M-0.6M, leading California The wind tunnel of the Polytechnic Institute is a full 0.15M.

The Mach number index of the airflow in the test section, in popular terms, is the wind speed performance of the wind tunnel, and the Mach 0.6M wind speed is equivalent to 204 meters per second.

Hearing Feng Kamen's praise, Waldunde smiled a little embarrassedly, and then cared: "Teacher, as far as I know, you should have an academic visit in Moscow now, why did you suddenly end the visit and arrive in Peiping by plane?"

"This is where I am puzzled." Feng Kamen shook his head gently, turning his eyes to the relevant personnel of the Army Aviation Administration who came slowly behind him, and said softly.

The reason for the early termination of the academic visit to Moscow was due to the requirements of the Army Aviation Administration. He did not know the specific reasons.

Waldender glanced at the colonel officer attached to the Army Aviation Bureau, knowing the seriousness of the situation, did not continue to speak, and kept quiet.

The people who came to pick up the plane this time were not only from the Chinese Air Force, but also Tian Hong, the head of the Blue Shirts Club in Peiping, and personnel from Nanjing. Soon, Feng Kamen, Colonel of the Army Aviation Administration and others were received by the Chinese side. , take a special car to leave Nanyuan Airport and go straight to the city.

"Professor Carmen, first of all, I'm sorry to have to interrupt your trip to Moscow. The reason why we do this is because we received a secret letter from China three days ago. This information shows that the Japanese We are preparing to launch a large-scale war or an all-out war against China, which will cause many deaths and our interests will be seriously damaged. In order to help China resist the Japanese attack, we need to help the Chinese Air Force become stronger." On the top, Von Kamen and the accompanying Colonel of the Army Aviation Bureau sat in the back row. Colonel George took out a highly confidential military document, handed it to Von Kamen to read, and then revealed the purpose of the trip to China.

"So that's how it is..." Feng Kamen took over the military documents and read the contents carefully, his eyebrows furrowed: "Colonel George, how can we help the Chinese Air Force become stronger? You should understand that the Air Force cannot be achieved in a short time. stronger."

"We have specific arrangements. What you have to do is to help the other party develop the aviation industry and aviation disciplines and make theoretical suggestions." Colonel George replied.

"Okay..." Feng Kamen nodded.

(End of this chapter)