In her impression, this junior brother is always very confident in the technical field, but he always lacks some momentum when communicating with others.

Fortunately, the other party's ability is really outrageous, and everyone who can always directly smash the research results is convinced.

In this case, the original lack of aura has become an advantage such as "elegant and easy-going" and "approachable" in the eyes of others.

And today is the first time Yao Mengna has seen the other party so categorical, even with a slightly domineering side.

After saying the first sentence, Chang Haonan's brain experienced a momentary blank.

Fortunately, his performance just now made everyone think that he was brewing emotions.

At this point, we can only go on.

Thinking of this, Chang Haonan calmed down.

He took a deep breath and spent about half a second organizing the next language:

"As an engineer, you should be clear about the theory of risk control."

"As it stands, this unknown manufacturing flaw doesn't break down the redundancies left in our design process, at least in the current testing, and the engine isn't working as a result of it."

"So there is no need to disrupt the progress of the design finalization, after all, it also involves whether the 83 project can be displayed in a complete form in the air show."

"The No. 02 prototype has been sent to Yanliang, just waiting for the end of the high-altitude platform test on our side, and it is ready to go to the 086 platform for aerial testing, and the 601 side is also adjusting the fuel tank layout of the aircraft to adapt to the two engines that have become 220 kilograms lighter."

"These tasks affect the whole body, and if we stop, it will also have an impact on the work of these brother units."

"Of course, the problem must not be left alone, but it can be solved in the process of production finalization."

"I can understand that after seeing the performance of this engine, you are reluctant to take the slightest risk, but comrades, the sky of the motherland does not leave us enough time to pursue the limit."

“……”

As the main proposer of the turbojet 14 compressor improvement plan, these words came out of Chang Haonan's mouth, and the persuasiveness was naturally completely different.

The entire control room was quiet again.

Soon someone came forward to say yes.

After all, everyone understands the truth, but most people are still in the excitement of yesterday just now, so the idea is on the tip of the horns.

Of course, in the end, it has to be decided by Yan Zhongzhong:

"Since it can be determined that it is a problem in the manufacturing process, then I will contact Comrade Zhong Shihong first and ask him to conduct a self-inspection of the turbine blade production process first, at least to ensure that the current manufacturing process can be completed with quality and quantity."

"As for us, Comrade Xiaochang is right, judging from the current situation, the test work should continue, and the comrades of the 624 Institute said that there is still a turbojet 13 improved model to be tested after us on the Zhucheng side, so the original plan will continue to be maintained."

"If there's nothing going on, let's go back and prepare for tomorrow's start-up and re-launch test."

……

At the insistence of Chang Haonan and Yan Zhongzhong, the ground tests of Turbojet-14 continued as usual.

In the following half a month, a series of sub-projects such as starting and restarting, plateau and high and low temperature, thrust transient, afterburner on/off, and engine control system were successfully completed with the cooperation of 624 Institute of overtime.

There were no further surprises worth mentioning.

And Chang Haonan was not idle during this time.

He is working on the design of the intake distortion test for which he is responsible.

In fact, this is arguably the most complex and difficult part of the entire high-altitude test.

After all, the other test subjects only test the performance of the engine.

The first problem to be faced in the intake distortion experiment is actually -

There is no one standard for it.

Although when he first arrived in Fucheng to assign tasks, Yan Zhongzhong actually only asked Chang Haonan to test the surge of the engine, but the strict intake distortion test is definitely not the same as the breathing test.

After all, in addition to the extreme cases of surge and rotational stall, the common situation of intake distortion can still directly affect the performance of the engine.

This is especially true for fighter jets that often have to perform overstall maneuvers with large angles of attack, large sideslip angles, and even launch missile/rocket weapons during these maneuvers.

The tail smoke of the missile launch, which has been plaguing the J-8-3 before, can also be regarded as a kind of air intake distortion.

Therefore, in order to evaluate the stability of the engine, it is necessary to at least define what stability is, what indicators can determine stability, and how to measure these data......

And the aviation industry of China as a whole is currently almost ignorant of this.

The Turbojet 14 was actually the first engine in Huaxia to go this far.

In 1994, on the basis of the ARP1420 and AIR1419 standards introduced from the United States, China issued GJB/Z64-94, that is, the "Guidelines for the Evaluation of Total Pressure Distortion of Aviation Turbojet and Turbofan Engines".

However, this guide lacks the necessary experience and test data to support it, and does not have calculation procedures and engineering methods, so it can be said that it has no operational value.

In the original timeline, this problem was not solved until the end of the 90s, when Russian compatibility theory and analytical methods were systematically introduced.

It is already a new century to really set the standard.

Turbojet 14 certainly can't wait until that time.

So Chang Haonan decided to come by himself.

Of course, it doesn't mean that he alone wants to complete the content of the entire national military standard.

But at least give a good start.

……

In short, when Chang Haonan put a nearly 100-page copy of "Aero Engine Intake Distortion Test and Evaluation Method" in front of Yan Zhongzhong, the latter almost bulged out his eyeballs in shock.

"You wait, you wait."

Yan Zhongzhong put down the half-picked water glass, rubbed his pounding heart, and stopped the young man in front of him who was about to speak at length.

He felt he needed to take a break.

There are too many surprises, and sometimes they can turn into scares.

After about half a minute, Yan Zhongzhong finally felt that he had calmed down.

"What are you...... A whole set of experiments were designed according to the national military standard? ”

"That's not the case."

Chang Haonan shook his head decisively, the strict air intake distortion experiment involves the matching of the engine and the intake tract, firstly, there is not so much time to toss for today's 83 project, and secondly, the objective conditions of the 624 Institute do not allow complex distortion simulation.

For example, the tail smoke when the missile is launched will not work.

"Oh, it's good if you don't have it...... No, it doesn't matter if you don't, we can ...... step by step" Yan Zhongzhong picked up the water cup again and took a sip of water.

"I just added the engineering and calculation methods for temperature distortion and pressure distortion in the national military standard."

"Ahem-cough-ahem-"

(End of chapter)