Experimental device and method for testing diffusion behavior of micro-leakage gas in limited space

The invention discloses an experimental device and method for testing the diffusion behavior of micro-leakage gas in a limited space, and aims to overcome the defect that the diffusion behavior of the micro-leakage gas in the limited space cannot be simulated and tested in the existing technical scheme. According to the experimental device and method for testing the diffusion behavior of the micro-leakage fuel gas in the limited space, the limited space is simulated through a similar cavity, the diffusion behavior of the micro-leakage fuel gas in the limited space is tested, and the diffusion behavior of the micro-leakage fuel gas in the limited space comprises light natural gas in the fuel gas and heavy liquefied petroleum gas in the fuel gas. The device is suitable for testing the diffusion behavior of the micro-leakage gas in a general limited space. The experimental device comprises a gas cylinder, an isolating valve, a regulating valve, a flowmeter, a temperature sensor, a pressure sensor, a gas concentr