At the critical moment of the first verification machine's test run, Li Tianfeng was of course present. In addition, Qiu Wen'an, Sun Xiaoping and others were also present, and they had to see this very commemorative moment with their own eyes.

This time, Zhang Haiping came here early. He arrived in Songzhou yesterday afternoon and stayed at the Guobin Hotel. He arrived at Tianfeng Technology Company early this morning. At this time, he was next to Li Tianfeng.

Everything is ready and you can start the test drive!

A rapid alarm bell rang throughout the test workshop. Then, whistles sounded, and irrelevant personnel must immediately evacuate the site and go to the area outside the yellow line.

In the yellow line area in front of the air inlet in the test workshop, there will be no one in the yellow line area behind the exhaust passage. The relevant staff in the test workshop will evacuate, and the door between the test workshop and the monitoring control room will be closed, and the relevant staff will be in place in the monitoring control room.

Li Tianfeng and others were also in the monitoring and control room. Through the huge and thick glass, they could clearly see the engine located on the test stand in the test workshop.

A few minutes later, the second alarm rings!

The alarm rings again throughout the test workshop. When the second alarm ring was heard, the employees of the test workshop felt inexplicably excited, and the exciting test train was about to begin.

The third alarm rings!

As the alarm bell rang three times, Li Tianfeng said with great enthusiasm: "Start the test drive!"

The on-site test run commander also shouted loudly: "Start the test run!!! The test run started!!!"

Several test runners had already made all preparations and had long sat upright in front of the test drive console. When they heard the order, one of the test runners pressed the test run start button with a little excitement in their hearts, and started the first program of the test run, and the test run started.

The so-called test drive start means that the test drive starter drives the engine and accelerates the engine rotor from a standstill to a specified slow train.

On the test drive table, under the driving of the starter, the rotor part of the engine begins to rotate. It gradually accelerates and gradually reaches the specified slow state. The speed of the engine rotor can be clearly seen through the control display screen of the console.

The engine is in good condition and the engine is in good condition and the test runner who is responsible for monitoring the engine test run state said loudly: "The test run starts normally!"

"normal!"

"normal!!"

"normal!!!"

These test runners looked at the data in front of them and reported loudly one by one. A loud voice spread throughout the test run monitoring and control room. Qiu Wen'an and Sun Xiaoping looked at each other and could clearly see the joy between them. The start of the game was good and the test run started normally.

Li Tianfeng was also slightly happy. The test run started normally, which means there was no problem with the engine assembly and the engine could operate normally and freely.

The on-site test run commander said loudly: "Driving fake driving!" After saying that, he also made a special test run command gesture.

Generally speaking, the noise is very high. Although the monitoring and control room has taken sound insulation measures, it is very close to the test engine. Generally speaking, the noise in the monitoring and control room will exceed 85 decibels. The test command has a special command gesture. If the gesture command is not combined with the gesture command, the test operator may not be able to hear it clearly.

Hearing the commander, the test runner immediately started to drive fakely, and the engine quickly entered the fake driving state.

The so-called fake driving means that the engine is driven by the starter and only supplies fuel to the combustion chamber without ignition.

"normal!"

"normal!!"

"normal!!!"

The loud voices of several test runners came again, and everyone looked happy again. Li Tianfeng could clearly see the engine entering a fake driving state through the wide and thick glass.

After the engine started and the driving state was fake, everything was normal. The test commander shouted loudly again: "Immediately, enter the slow-moving state."

Hearing the order, the tester pressed the button, the engine ignited successfully, and started working, gradually making a series of sharp and stable sounds, and the sound gradually increased, and the monitoring test room. Everyone felt that the sound was deafening, and if they didn't speak loudly, they really couldn't hear clearly.

The slow train state and cruise working state, rated power state, maximum working state, etc. are all different working states of the aircraft engine.

The test drive of a new aircraft engine generally follows the principle of gradual progress, such as starting just now, driving, and then driving to the current slow train working state. The so-called slow train working state is the minimum power state for the engine to work reliably and stably. Generally, the speed is 25% to 30% of the maximum speed, and the power is 3% to 5% of the maximum power.

After a few minutes of slow train condition, the engine starts a series of test drives according to the test drive process, such as cruise working state, rated power state, and also conducts equivalent power start, cold start, hot start, warm start, cold start, cold start, etc.

"normal!"

"normal!!"

"normal!!!"

What Li Tianfeng heard was a loud "normal" sound. Such a sound sounded so pleasant and comfortable.

As the chief designer of this engine, Qiu Wen'an was in the most exciting and happy mood, and it can be clearly seen from the expression on his face.

Zhang Haiping was also happy. It was really worth the trip this time.

Aero engine verification and test run is a general verification of its design, manufacturing process, materials, etc. Only when the engine verification and test run is normal means that there is no problem in the design, manufacturing process, materials, and other aspects of the engine are also free of problems and feasible.

Once the engine fails to test and problems occur, the problem must be analyzed and the cause can be found, and even some defects and problems in the design can be directly reflected, or some problems in material selection, or some problems in parts manufacturing technology and aircraft assembly technology.

Now, the engine has been verified and tested for so many subjects, and it has always been normal. No wonder everyone is very happy. Even Qiu Wen'an, the general design, is full of joy. So many test subjects have been completed, and the first verification and test drive is about to come to an end.

Li Tianfeng was also quite happy, but Li Tianfeng was not as obvious as Qiu Wen'an, Zhang Haiping and others, because Li Tianfeng knew that the real test was about to begin.

In the series of test runs just now, the maximum working state reached by the engine is the rated working state, which is far from the maximum power working state.

When the engine reaches its maximum power working state, each part will withstand the limit test, whether it is under the force test or the working environment test, it will reach the limit.

If in the maximum power operating state, the turbine rotor, one of the thermal components, will output the maximum power, its stress will also reach the maximum state, and the temperature before the turbine will also reach the maximum.

Under such high temperature and high stress conditions, it is a strict test for turbine blades, turbine discs and other parts.

We all know that as the temperature increases, the strength of the metal will drop. When it reaches thousands of degrees Celsius, some metals will turn red and soft, and the strength will be completely different from that of the room temperature.

The "tfwz001" type turbine shaft engine has a temperature of more than 1,000 degrees Celsius. In such a high-temperature environment, turbine blades, turbine discs and other parts have to withstand huge forces and output huge power of 1,800kw or even more. The degree of test can be imagined.

After this series of test subjects were completed, the real test of test also began. The test commander-in-chief found that he had always been calm and suddenly became a little nervous. He couldn't help but look at Li Tianfeng and gave Li Tianfeng a look.

Li Tianfeng understood the meaning of this look, so Li Tianfeng nodded.

Seeing this, the test run commander waved his hand, made a gesture, and shouted loudly: "Test run in maximum working condition!"

Hearing the order, the test runner started the engine again and pushed the push rod gradually, pushing it to the extreme and to the maximum extent. The engine started and gradually accelerated. The sound of sharp and stable turboshaft engine test run sounded in everyone's ears again.

In the monitoring and control room, a series of instruments monitor the status of the engine. On several LCD screens, various parameters are clear, and the data about the working status of the engine has been climbing and changing rapidly.

For example, the engine speed, output power, fuel consumption, etc., all data become faster and faster as the engine speed increases. These data are like dancing, flashing quickly and changing rapidly.

In the entire monitoring and control room, there was only the sound coming from the engine when it was working. Everyone was quiet and no one spoke. Everyone's eyes were all staring at these instruments, these LCD screens, and these data.

Just now, the test subjects were successfully completed and everything was normal. Qiu Wen'an and others were still excited and happy. At this time, everyone looked at the data with a focused look on their faces.

The engine starts with power climbing, from 0.3 rated power state to 0.5 rated power state, to cruising working state, to 1.0 rated power state, and then move towards the maximum power state.

Watching the engine pass through the rated power state, the output power of the engine on the LCD screen reaches 1800kw and continues to rise, 1850kw, 1900kw, 1950kw...

As the power data climbed, everyone's hearts rose, and they almost reached their voice. When they lifted it up a little, they were about to jump out of their voices.

At this critical moment, suddenly, Li Tianfeng's face changed slightly, and the sound of the engine working also changed, and there was a significant abnormality.

As the general design city of this engine model, Qiu Wen'an naturally has clear engine performance and test drive. At this time, Qiu Wen'an's face changed drastically.

Although Zhang Haiping was not so professional, he couldn't help but feel inexplicably nervous when he saw the obvious changes in their faces. He said in his heart that it would be bad, it would be bad, there must be something wrong.

…………
Chapter completed!