Chapter 110 I just added the 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 indeed ridiculously strong, and everyone who can always directly use the research results to defeat him is convinced.
In this case, the original lack of aura becomes advantages such as "elegant and easy-going" and "approachable" in the eyes of others.
Today is the first time 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 his 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 at the moment. During the test, there was no abnormality in the working condition of the engine.”
“So there is no need to disrupt the progress of the design finalization. After all, this also involves whether the Eighty-three Project can be successfully performed at the air show. The complete form is displayed.”
“Prototype No. 02 has been sent to Yanliang. We are just waiting for the high-altitude platform test here to be completed, and we are ready to go to the 086 platform for aerial testing. The 601 Institute has also already done so. Adjusting the aircraft's fuel tank layout to accommodate the two engines that have become 220 kilograms lighter."
"These tasks affect the whole body. If we stop, the work of these brother units will also occur. Impact."
"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 after seeing the performance of this engine, you are not willing to have any concerns. A risky idea, but comrades, the sky of the motherland does not leave us enough time to pursue the limit."
"..."
As the main proposal for the improvement of the turbojet 14 compressor. Well, when these words come out of Chang Haonan's mouth, their persuasiveness is naturally completely different.
The entire control room became quiet again.
Someone quickly stood up to express their agreement.
After all, everyone understands the truth, but most people were still in the excitement of yesterday, so their ideas were confused.
Of course, the final decision still has to be made by Yan Zhongcheng:
“Since it can be determined that it is a problem in the manufacturing process, I will first contact Comrade Zhong Shihong and ask him to first review the turbine blade production process. Conduct a self-examination 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 version of the Turbojet 13 at Zhucheng that will follow us for testing, so we continue to maintain the original plan.”
"If there are no problems, then go back and prepare for the start-up and restart tests tomorrow."
...
With the insistence of Chang Haonan and Yan Zhongcheng, the turbojet 14 Ground testing continues 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 all worked overtime with the cooperation of 624 Institute Done successfully.
There were no other 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 that there is no standardized 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 post-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 is currently almost Nothing.
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 guide lacks the necessary experience and test 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 1990s, when Russian compatibility theory and analysis methods were systematically introduced.
It is already the new century to truly set the standards.
The Turbojet 14 certainly cannot wait until that time.
So Chang Haonan decided to do it himself.
Of course, it does not 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 almost rolled his eyes. The child was so shocked that he protruded.
"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. people.
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.
“You are...designing a complete set of experiments in accordance with national military standards?”
“No.”
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 regarding temperature distortion and pressure distortion in the national military standards.”
“Cough—cough cough—”
< br>
(End of this chapter)