Traditional Culture Encyclopedia - Photography major - Why is the Xiangyun torch not afraid of water?

Why is the Xiangyun torch not afraid of water?

The bright yellow flame will not jump up and down.

The design of "Xiangyun" adopts a pressure stabilizing valve to maintain the gas pressure, thus stabilizing the flame height.

Different from the mixed fuel of the previous Olympic torch, the fuel of the Beijing 2008 Olympic torch is propane. This is a common fuel with low price and wide temperature range. Propane combustion only forms water vapor and carbon dioxide, and there are no other substances, which will not pollute the environment and meet the requirements of green Olympics. The flame color of propane gas combustion is bright yellow, which is convenient for identification, TV broadcast and news photography.

Stable fuel supply without heat preservation vehicle

When the fuel temperature of the torch reaches 20℃, the propane fuel in the fuel tank will generate a pressure of about 10 atmospheric pressure, while Xiangyun's solid fuel tank can withstand 150 atmospheric pressure. Therefore, there is no need to worry about the leakage of torch fuel due to excessive pressure. When the outside temperature is as low as -20℃, the atmospheric pressure generated by propane fuel is only 2. Under such a low atmospheric pressure, how to ensure the continuous energy supply of the torch? The pressure stabilizing valve and the heat return pipe will solve this problem.

In the past, the Olympic torch used mixed fuel, and it was necessary to equip a heat preservation vehicle to maintain the temperature and pressure of the fuel. The torch of Beijing 2008 Olympic Games uses regenerative tubes to heat fuel. In this way, the fuel tank can generate enough pressure to support the torch combustion without using external heating devices.

The torch continued to burn in the rain.