Why can't the Olympic torch be blown out by wind and rain?

The torch of Beijing Olympic Games is designed with light and high-quality aluminum alloy and hollow plastic parts, which is very light, recyclable and environmentally friendly. The fuel used for the torch of Beijing Olympic Games is propane, which is a cheap common fuel. Combustion time15min, flame height 25-30cm at zero wind speed. Its main components are carbon and hydrogen. After burning, there are only carbon dioxide and water, and there are no other substances, which will not pollute the environment.

During the torch relay of Beijing Olympic Games, it is possible to face all kinds of unexpected climatic conditions, and strong winds and heavy rains will severely test the torch burning technology. In order to provide a reliable combustion system for the torch, Aerospace Science and Industry Group contributed a reliable "core" to the Olympic flame. This "core" combustion system consists of three parts: burner, pressure stabilizing device and gas storage tank. Among them, the burner adopts an innovative double flame scheme, that is, the pre-combustion chamber plus the main combustion chamber. This is the first time that the precombustion chamber is separated from the main combustion chamber in the design of the Olympic torch. The flame in the precombustion chamber will ensure that the torch will not go out. Even in windy weather, the precombustion chamber buried under the top of the torch will not be affected. The flame generated by the main combustion chamber will make the flame of the whole torch burn to ensure the visual effect of the torch. When the outside temperature is as low as -20 degrees Celsius, the heat pipe used in the torch of Beijing Olympic Games uses the heat generated by the torch combustion to heat the fuel, so that the fuel tank can generate enough pressure to support the torch combustion without external heating devices.

The torch of Beijing 2008 Olympic Games has reached a new technical height in terms of combustion stability and adaptability to the external environment, and it can keep burning under the conditions of strong wind of 65 kilometers per hour and 50 mm rainstorm.