Original: Shen Peng Source: official account: Prince Hirahara has been authorized to reprint
In fact, China’s J20, Y-20, C919, and even the hypersonic missile Dongfeng 17 are all blown out.
You’re right, it was blown out in the “wind tunnel”.
Wind tunnels can generate strong airflow to simulate the effects of airflow on aircraft during high-speed operation. Any aircraft or missile design must undergo wind tunnel testing.
Natural wind cannot meet the simulation requirements of high-speed aircraft, so we need to manually create various types of wind, including low-speed wind, high-speed wind, variable speed wind, transonic wind, supersonic wind, ultra-high speed wind, cold and hot wind, icing wind… So we need wind tunnel groups.
The construction cost of the wind tunnel group will exceed hundreds of billions, and the maintenance cost is also astronomical.
Large wind tunnels consume a lot of electricity, so there should be specialized power stations or even reservoirs around the wind tunnels.
Light can blow out wind, but high-precision measurement and control equipment is also necessary.
The financial and technological barriers have blocked the vast majority of countries in the world
The reason why so-called “developed countries” such as Japan and Germany cannot produce high-tech modern fighter jets, large aircraft, and advanced missiles is because they do not have world-class wind tunnel laboratories.
Why can’t the United States build hypersonic missiles?
Because they cannot conduct wind tunnel experiments at this level.
So, in today’s world, it’s not like anyone wants to build an airplane, a missile, or a spaceship; If you want to go to heaven, you must first be able to blow.
What is the level of our wind tunnel laboratory? World number one! And how strong is the wind tunnel group in Sichuan, which ranks second in the world? Strong enough to undertake any wind tunnel experiment from all other countries around the world!
The JF22 ultra large shock wave wind tunnel built in China can blow 30 times the speed of sound, leading the United States by 20 to 30 years. If the aircraft can reach a flight speed of 35 Mach, which means it can fly over 12 kilometers in one second, then it can fly from China to the West Coast of the United States in 14 minutes (1 Mach is equal to twice the speed of sound).
In 1960, China’s first supersonic wind tunnel FL-1 was put into use at Shenyang Aerodynamic Research Institute, and hundreds of products underwent countless tests in this wind tunnel. In 1997, the China Aerodynamics Research Center in Mianyang, Sichuan built the largest transonic wind tunnel in Asia, which helped design and manufacture the J-10 and Flying Leopard series in China.
In May 2012, the JF-12 Shock Wave Wind Tunnel, one of the eight major national scientific research equipment development projects in China, passed the acceptance inspection. The JF-12 can simulate high-speed flight at Mach 10, providing support for the design and testing of the Dongfeng-17 hypersonic missile.
The instantaneous power of the “Shock Wave Wind Tunnel” is almost close to the power of the Three Gorges Dam. The aircraft blown out here can fly 10 kilometers per second, which has exceeded the first cosmic speed (7.9 kilometers per second) and approached the escape velocity (11.2 kilometers per second). It can almost circle the earth once an hour. It is because China has independently designed and manufactured world-class wind tunnel clusters (China Aerodynamics Research and Development Center in Mianyang, Sichuan) that China can become a major aerospace and aviation country. This wind tunnel group was planned by Qian Xuesen and Guo Yonghuai, and was established in 1968 with the approval of Chairman Mao.
The Mianyang Wind Tunnel Group has a 2.4-meter transonic wind tunnel and can be tested from low speeds to 24 times the supersonic speed. In addition, it also has a supercomputer capable of processing 14 trillion times per second, which can test multiple devices, including rocket engines. At present, the wind tunnel has conducted up to 470000 wind tunnel tests, including some tests on Shenzhou spacecraft and J-20 fighter jets.
China’s wind tunnel technology has even been used in sports. The Third Institute of the 11th Institute of China Aerospace Science and Technology Group Co., Ltd. has built two large, two small, and four sports wind tunnels for the General Administration of Sport of China, providing wind resistance data for athletes’ training, sportswear, and steel frame snowmobile design.
On May 30, 2023, the National Natural Science Foundation of China organized a final acceptance meeting for the national major scientific research instrument development project “Detonation Driven Ultra High Speed High Enthalpy Shock Wave Wind Tunnel” (JF-22 Ultra High Speed Wind Tunnel) at the Huairou Park of the Institute of Mechanics.
The JF-22 ultra high speed wind tunnel project is a national major scientific research instrument development project supported by the National Natural Science Foundation of China and undertaken by the Institute of Mechanics of the Chinese Academy of Sciences. It was officially launched in 2018, with a development cycle of five years. The project leader is researcher Jiang Zonglin.
Jiang Zonglin proposed a forward detonation driving method based on shock reflection, which turned the “unusable” detonation wave head into “usable” and “user-friendly”. He led the team to construct the technical system of the ultra-high speed shock wind tunnel and successfully developed the JF-22 ultra-high speed wind tunnel.
This wind tunnel is a super large experimental instrument in the hypersonic and hypersonic fields, with a total length of 167 meters, a nozzle outlet of 2.5 meters, a laboratory chamber diameter of 4 meters, and an experimental airflow velocity range of 3-10 km/s. It can reveal the complex medium flow pattern dominated by molecular dissociation, and can effectively support the development of China’s space and space transportation system and ultra-high speed aircraft. It is crucial for promoting the development of aerodynamics Improving China’s aerospace high-tech research and development capabilities is of great significance.
The JF-22 super-high speed wind tunnel and the JF-12 recurrent wind tunnel together constitute the only ground test platform covering all flight corridors of adjacent spacecraft.
The JF-22 wind tunnel can reproduce flight conditions at altitudes of 40-100km and speeds of approximately 30 times the sound speed. Jiang Zonglin said, “The goal of the JF-22 wind tunnel is to assist the space shuttle system. If successful, it can reduce the launch costs of satellites and spacecraft by 90%
Everyone can think of it, what does this mean?
So, for the sake of the stars and the sea, such a “Chinese wind” cannot be blown!