Abstract

In order to study the internal gas flow of Y type branch pipes in the exhaust ventilation conditions, the branch pipe is simulated by using FLUENT software. Combined with experimental results, comparatively analyze exhaust ventilation pressure, velocity and vortex flow of the branch pipe. The results show that simulation and experimental data consistent overall trend, the difference is less than 8%, the main entrance pressure of the branch pipeline decreases with the width of the leakage increasing, leakage width of 0 mm, 1 mm, 2 mm cases, there is vortex tube, and valve and the main ventilation pipe case gas exchange occurs when no leakage, this study provides a theoretical and practical basis for further analysis of branch pipe exhaust ventilation.

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