Chapter 110 I conveniently added a national military standard

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

Fortunately, the other party's ability is really ridiculously strong, and everyone who can always directly use the research results to win is convinced.

In this case, the original lack of aura turns into advantages such as "elegant, easy-going" and "approachable" in the eyes of others.

Today is the first time that Yao Mengna has seen the other party be so decisive, even with a slightly domineering side.

After saying the first sentence, Chang Haonan's brain went blank for a moment.

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

Now that the matter has come to this, we can only continue talking.

Chang Haonan calmed down when he thought of this.

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

"As engineers, everyone should be aware of the risk control theory."

"Judging from the current situation, this unknown manufacturing defect has not broken down the redundancy left in our design process. At least in the current test, the working condition of the engine has not been abnormal because of this."

"So there is absolutely no need to disrupt the progress of the design finalization. After all, this also involves whether Project 83 can be displayed in a complete form at the air show."

"Prototype No. 02 has been sent to Yanliang. We are just waiting for the high-altitude platform test here to be completed before we prepare to go to the 086 platform for air testing. The 601 Institute is also adjusting the fuel tank layout of the aircraft to adapt to the lighter 220 Kilograms of two engines.”

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

"Of course, the problem cannot be left alone, but it can be solved one after another during the production and finalization process."

"I can understand that everyone is not willing to take risks after seeing the performance of this engine, 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 come from Chang Haonan's mouth, and the persuasiveness is naturally completely different.

The entire control room fell silent again.

Someone quickly stood up to express their agreement.

After all, everyone understands the truth, but most people are still in the excitement of yesterday, so their ideas are confused.

Of course, the final decision still has to be made by Yan Zhongcheng:

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

"As for us, Comrade Xiao Chang is right. Judging from the current situation, the testing work should continue. Moreover, the comrades from the 624th Institute said that there is an improved turbojet 13 on the Zhucheng side to follow us. Doing testing, so continue to maintain the original plan.”

"If there are no problems, then go back and prepare for tomorrow's startup and restart tests."

……

At the insistence of Chang Haonan and Yan Zhongcheng, the ground test of Turbojet 14 continued as usual.

In the following half month, a series of sub-projects such as start and restart, plateau and high and low temperature, thrust transient, afterburner on and off, engine control system, etc. were successfully completed with the cooperation of 624 institutes working overtime.

There were no further surprises worth mentioning.

And Chang Haonan was not idle during this period.

He is conducting the intake distortion test design that he is responsible for.

In fact, this can almost be said to be the most complex and difficult link in the entire high-altitude platform test.

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

The primary problem faced by the intake distortion experiment is actually -

There is no standard standard.

Although Yan Zhongcheng actually only asked Chang Haonan to test the surge condition of the engine when he first arrived in Fucheng to assign tasks, the strict intake distortion test is definitely not equivalent to the forced surge test.

After all, in addition to extreme situations such as surge and rotational stall, the more common situation of intake distortion will directly affect the performance of the engine.

This is especially true for fighter jets that often perform over-stall maneuvers with large angles of attack and large sideslip angles, and even launch missiles/rocket weapons during these maneuvers.

The missile launch exhaust smoke that has been bothering the J-8-3 before can also be regarded as a type of air intake distortion.

Therefore, if you want to evaluate the stability of an engine, you must at least first define what stability is, what indicators can determine stability, and how to measure these data...

The entire Chinese aviation industry currently knows almost nothing about this.

The turbojet 14 is actually the first Chinese engine to reach this point.

In 1994, based on the introduction of the American ARP1420 and AIR1419 standards, my country issued GJB/Z64-94, which is the "Aviation Turbojet and Turbofan Engine Import Total Pressure Distortion Assessment Guide."

However, this guideline lacks the necessary experience and experimental data support, as well as calculation procedures and engineering methods. It can be said that it has no operational value.

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

It is already the new century to truly set standards.

Turbojet 14 certainly cannot wait until that time.

So Chang Haonan decided to do it himself.

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

But at least give it a good start.

……

In short, when Chang Haonan placed a nearly 100-page "Aeroengine Inlet Distortion Test and Evaluation Method" in front of Yan Zhongcheng, the latter's eyes almost bulged out in shock.

"You wait, you wait."

Yan Zhongcheng put down the half-filled water glass, rubbed his pounding heart, and stopped the young man in front of him who was about to start a long speech.

He felt that he needed to slow down.

Too many surprises can sometimes turn into shock.

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

"Did you...design a complete set of experiments in accordance with national military standards?"

"That's not the case."

Chang Haonan shook his head decisively. The strict intake distortion experiment involves matching the engine and the intake duct. Firstly, there is not so much time for the current Eighth-three Project, and secondly, the objective conditions of the 624 Institute It also does not yet allow for complex distortion simulations.

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

"Oh, it's fine if you don't have it... No, it doesn't matter if you don't have it. We can do it step by step..." Yan Zhongcheng picked up the water glass again and took a sip of water.

"I just supplemented the engineering and calculation methods related to temperature distortion and pressure distortion in the national military standards."

"Cough-cough-"