Chapter 1171 Hypersonic Wind Tunnel
Even some aviation enthusiasts have heard about China’s establishment of the Turbofan 20 project.
Naturally, there is no way to hide this from these well-informed colleagues.
However, the industry's performance expectations for this model are basically the same as the PS90A, and it will serve as a domestic replacement for the latter.
However, this is not entirely because they underestimated China's aviation development level.
It’s that the Turbofan 10 itself is too confusing——
Although the self-use J-10A and J-11B have not officially appeared in public at air shows or other occasions, these two models, especially the latter, have encountered many old opponents around China.
Judging from feedback from pilots and information collected from various channels, the performance of the turbofan 10 should be slightly stronger than the original AL31F and early F110GE100, roughly reaching the level of the third and a half generations.
And considering China's relatively weak material and process level, it may be that the service life has been exchanged for a certain performance.
It should be said that this series of speculations are not wrong.
It can even be said to be very accurate.
But the problem lies behind.
Due to the above analysis, it is natural for everyone to regard this model alongside the 117S or F110GE129 as the ultimate overhaul of the third-generation turbofan engine.
It should be a state where the potential has been almost drained.
However, in fact, the Turbofan 10 is a youth version of the fourth-generation turbofan engine.
We are at a stage where we have not yet begun to exploit our potential.
Over and over again, the performance estimation of the turbofan 20/AE1500 naturally went wrong.
The performance is comparable to that of PS90A, which was barely enough in the 1990s.
But now in 2005, it is already at a level that is unlikely to make it to the table.
Basically, it can only be sold in China and Russia like C909/Tu214, or sold to some users who are unable to purchase the latest Airbus or Boeing aircraft due to Western sanctions.
What's more, the airworthiness mutual recognition agreement China reached with Europe a few years ago does not include mainline aircraft. Even if their new turbofans can reach the average level of V2500 or CFM56-7, it will be difficult to easily surpass
Therefore, in the view of Panos Watson at this moment, China has simply borrowed their British talent for stirring up trouble and is preparing to add chaos to the CAEP8 emission standards that are about to be formulated.
However, Tim Purdy has a different view.
"Mr. Director."
After all, they were discussing work matters, so he also changed his title:
"Do you think it is possible that China wants to take advantage of the opportunity of setting new emission standards to increase its voice in the entire aviation industry?"
"I mean, they first proposed a goal that is impossible for everyone to achieve, but we can't openly question the correctness of lowering emissions..."
Although the CAEP standards are said to be formulated by the Aviation Environmental Protection Committee, like most other international organizations, actual operations are controlled by a few countries.
When the CAEP2/4 standard was formulated, both China's aviation technology and shipping market were still at a level where it was difficult to put it on the table, so there was naturally no opportunity to speak out.
But in the second half of the 1990s, especially after entering the 21st century, China's technological progress and technical cooperation in the field of regional airliners and helicopters, as well as the terrifying market size that has begun to realize its potential, have gradually given them a chance to compete for the right to speak. Base.
Not to mention others, it is difficult for Finmeccanica, Eurocopter, Airbus, Dassault... and even Rolls-Royce themselves to completely ignore the opinions put forward by China.
Not to mention that judging from this report, people still firmly occupy the moral high ground on the climate issue.
"But the best this can do is make the entire negotiation deadlock... and it won't be of any benefit to them?"
Although he said so, there were some subtle changes in Watson's eyes.
It was obvious that he had come up with some new ideas.
For example, cooperating with the Chinese to create some extra chaos for the other two competitors.
I'm just not ready to say it myself.
And Bodi is very suitable as the person who takes the initiative to give opinions (and takes the blame if something goes wrong):
"Maybe you're right, but what I mean is...why let the situation reach a stalemate?"
Watson smiled like an old fox:
"Go on." "Since we have guessed this in advance, and have already had de facto cooperation with the Chinese..."
Hearing this, Watson's smile became even brighter.
However, the meaning of the second half of Bodi's sentence completely deviated from Watson's estimate:
"Then why not talk to the Chinese people and use it as a bargaining chip to strengthen their voice within ICAO and get some additional investment from there?"
"..."
The sudden change made Watson's brain unable to react for a while:
"What?"
Bodie shrugged:
"Let's have a nominal joint research and development... Maybe we can hand over some parts to them for OEM production like the Trent 900, or refer to Airbus and put products sold to the Chinese market, or even the entire Greater China market. Assembled in China..."
Each company, or even the same company, has different positioning for "Greater China" at different times.
For example, on the Luoluo side, it refers to the entire China including both sides of the Taiwan Strait, Hong Kong and Macao, plus Malaysia, Vietnam and Singapore.
Watson's expression was a bit unbearable:
"But you just said that you didn't come to me to ask for money this time?"
But Bodi took it for granted:
"I'm not asking you for money, I'm just asking for your permission to make money abroad..."
……
As time passed, the report gradually caused ripples in the industry.
However, most people only regarded it as cooperating with Zheng Guogang's attack on the United States at the IPCC meeting, and did not really treat it as a particularly serious matter in the aviation field.
As for Chang Haonan himself, he has no time and is temporarily unable to pay attention to these small reactions that occur within other companies.
Instead, I have focused my main energy these days on a report——
After the component-level testing of the Turbofan 20 entered the second stage, he quickly determined the focus of his next work.
Considering that the future turbofan 10G can basically meet the basic needs of fourth-generation fighters, it seems that the variable-cycle engine will not have a suitable installation target in a short period of time.
On the other hand, as the new generation combat platforms of the People's Liberation Army (except the Army) are gradually finalized and installed, the main shortcoming that restricts the improvement of the army's combat effectiveness has become the lack of sufficiently advanced weapons and ammunition.
The hypersonic project can solve this urgent need.
Not only does the final hypersonic weapon have powerful deterrence capabilities, but the results obtained during the research process can also benefit other types of weapons and equipment, and even other fields.
But compared with Chang Haonan's past research, hypersonics is an almost completely different field.
It is difficult to rely on existing design and calculation theory and apply it mechanically.
So before any real research project, he first needed an assistive device.
Hypersonic wind tunnel!
And this can be said to be the area that Chang Haonan is most familiar with.
Not one of them!
You know, before his rebirth, he was a relevant technical staff member of the JF22 wind tunnel.
Although he was just an ordinary engineer who was not involved in the core design at that time.
But I am very familiar with the overall situation and technical difficulties of hypersonic wind tunnels...
"There are thermochemical reactions in the air around hypersonic vehicles, showing nonlinear, multi-physics and multi-scale characteristics...
When the temperature is around 2000K, the relaxation time of oxygen molecules is about one thousandth of a second, and at 6000K, it is about 0.1 microseconds. Calculated according to the flight speed of 6000m/s, then the equilibrium length of the first relaxation time is reached is 6 meters, which means that for a 6m long aircraft, the head shock wave has different shock wave temperatures, and the gas around the aircraft always has a certain area of gas in a non-equilibrium state..."
In order to express his importance, he did not use a computer or printer, but wrote quickly on a page:
"Reliable hypersonic ground tests must meet three key requirements. One is to reproduce the total airflow temperature under given hypersonic flight conditions. For example, under flight conditions at an altitude of 30km and a Mach number of 7, the total temperature of the wind tunnel test gas The temperature should be 2700K. At this time, the oxygen in the stagnation area of the aircraft model has begun to dissociate. For a flight with a Mach number of 10, the total airflow temperature exceeds 4500K, and nitrogen molecules begin to dissociate...
Therefore, any existing wind tunnel is not sufficient to support hypersonic research with a Mach number of 6 or above. Consideration should be given to building a new wind tunnel using detonation drive technology at the Fucheng base to support the development of hypersonic aircraft in my country's atmosphere. Work! ”
(End of chapter)