First use of hydrogen energy, resistance to 10 strong winds…The high-tech behind the Olympic torch

2022-07-25 0 By

Technology and green are the two main themes of the Winter Olympics, which are reflected in everything from venue construction to event organization and facilities.The torch, one of the most characteristic symbols of the Winter Olympics, has achieved zero carbon emissions for the torch in the history of the Winter Olympics for the first time.What are the high-tech features of the Olympic torch?And how to achieve zero emissions?”Flying” is the name of the hand-held torch used in the Winter Olympics. It is powered by hydrogen and is the world’s first high-voltage hydrogen storage torch, achieving zero carbon emissions for the Olympic Flame in history.Wang Chenggang, director of the 101 Institute of the Sixth Institute of China Aerospace Science and Technology Corporation: The whole core of the torch is called the hydrogen core.This part is our cylinder, aluminum alloy liner, carbon fiber winding is mainly for safety, its bearing capacity should reach 42 mpa.It should be in the high pressure category, and you have to decompress the hydrogen stored in the cylinder to atmospheric pressure, which is our proprietary technology in space.Hydrogen is green, but flammable, explosive and leaky, and there has been no successful use of hydrogen as torch fuel in previous Winter Olympics.In order to fit the design of the curved shell of the hand-held torch for the Winter Olympic Games, the researchers made bold innovations and adopted targeted design and lightweight technology to “slim down” the entire combustion system, freeing up space to ensure sufficient fuel storage.At the same time, to ensure high reliability of the torch burning process, the researchers used aerospace design concepts.Zheng Xiaodong, technical director of hydrogen control valve for the Torch project of Beijing 11th Institute of Aerospace Science and Technology Group: When we designed it, its strength was several times the safety margin.In accordance with our concept of reliability in space, we have conducted relatively full tests, which are somewhat similar to what we do in developing (rocket) engines, with all the functions and safety we should have.The torch braving the cold and the rain and snow, using rocket technology to do the torch, this is really quite new, so make the torch reliable?With such questions, CCTV reporters went to visit the torch test process.CCTV reporter Li Ning: In order to ensure the high reliability of the Olympic torch, a test base has been set up in the sixth Institute of China Aerospace Science and Technology Corporation.The test has already begun, and we can feel the wind and rain very clearly here, and the wind is about 65 kilometers per hour, which is about a force eight.Olympic torch to pass for many times, may encounter during the transmission of extreme weather, in order to make the torch in the face of bad environment can still stable, when researchers to simulate the special climate, such as wind, rain, low temperature environment, has carried on the experiment under various working conditions of more than 300 times, and ultimately to ensure the high reliability of the torch.Wang Chenggang, director of the 101 Institute of the Sixth Institute of China Aerospace Science and Technology Corporation, said: “During the testing process, the technical indicators of the torch only need to meet the force 8 wind, and we tested the limit of force 10 wind.The altitude test calls for 4,000 meters, and we tested 5,000 meters.In addition, the experiment also carried out torchbearers’ movement simulation under severe weather conditions, covering all kinds of movement during the torch relay.After much training, Feiyang has a very stable combustion condition under strong wind of 10, low temperature of minus 40 degrees Celsius, heavy rain and high altitude of 5000 meters.Even so, the researchers are still worried. Before each torch leaves the factory, there is one more test.Wang Chenggang, director of 101 Institute of the Sixth Institute of China Aerospace Science and Technology Corporation, said: “After the assembly of each torch, we conduct a 10-second test to assess the overall performance of the torch.So during the torch relay, every torch has been perfectly displayed.To shape the flame to ensure that the flame is elegant and flexible through rigorous and extreme tests, the reliability of the torch has been guaranteed.But at the same time, researchers were faced with a new challenge: how to make the flame more elegant?Due to the high pressure of the hydrogen storage tank, the flame will be as fierce as the tail flame emitted by the rocket engine, which is not only unsafe, but also lacks the elegant beauty of flame combustion. The flame produced by the Olympic torch needs to have a specific height and shape to ensure the flowing and elegant beauty.The combination valve installed at the mouth of the cylinder, which controls the hydrogen valve, has a part called the pressure relief valve, which is the key part that determines the beautiful shape of the flame.Liu Yue, technical director of Beijing 11th Winter Olympic Torch Project of the Sixth Institute of China Aerospace Science and Technology Corporation, said: “The size of our pressure relief valve is only 2/3 of the original size. It combines the three parts together.Hydrogen burns fast, and when the flame comes out, it’s straight, it doesn’t flutter or move.The amount of pressure after our pressure reducing valve (decompression) will directly affect its flame shape.Liu Yue introduced that the control hydrogen valve can change the pressure of hydrogen from 42 mpa of high pressure into about 1000 kpa of low pressure, so as to control the scope of flame combustion, and the shape of the flapper will need to complete the burner in the torch.Liu Yue, technical director of the Beijing 11th Winter Olympics Torch Project under the Sixth Institute of China Aerospace Science and Technology Corporation: the final requirement of the flame is that it should be stepped, with a higher center.This is a completely 3D printed shape, bending is not bent out of shape and direction.To color the flame in order to beautifully “fly” to solve the reliability problem, and to create a perfect shape for the flame, this should be done, right?It didn’t, and then there was the important problem of coloring the flame.01:24 Due to the nature of hydrogen, it burns in the air with a pale blue flame that is almost invisible to the naked eye in the natural environment.In order to achieve the flame visibility, it is necessary to find a way to make the flame display color.Developers in order to achieve flame coloring, tried a lot of methods, even in the home of the gas stove to start the experiment, this has now stable visible torch flame.Liu Yue, technical director of Beijing 11th Winter Olympic Torch Project of the Sixth Institute of China Aerospace Science and Technology Corporation, said: although you have some basic knowledge at the beginning, you still need to do tests. You can try them at home.Through trial and error, the researchers developed dozens of flame colors, and after a lot of comparison, settled on the yellow flame we see today.After determining the color, one of the next important issues to be solved is how to apply the developer to ensure a continuous 5 minutes of flame reaction.Liu Yue, technical director of the Beijing 11th Institute of The Sixth Institute of The China Aerospace Science and Technology Corporation, said: it uses a solvent to dissolve the flame dye formula together, thicken it, and then slowly brush it onto the surface.That’s about right there.Reporter: how much does besmear also have (do experiment)?Liu Yue, technical director of the Torch project at the Sixth Institute of China Aerospace Science and Technology Corporation, said: “Yes, we have to do experiments. The reliability of the hand-held torch for five minutes is not a problem at all.Reprint: CCTV news editor: Su Zhan Statement: Reprint this article for the purpose of passing on more information.If the source is wrong or violated your legitimate rights and interests, please contact the author with proof of ownership, we will promptly correct, delete, thank you.